Vulnerability-Lookup

CVE-2026-53041 (GCVE-0-2026-53041)

Vulnerability from cvelistv5 – Published: 2026-06-24 16:29 – Updated: 2026-06-28 06:38

Title

ocfs2: fix listxattr handling when the buffer is full

Summary

In the Linux kernel, the following vulnerability has been resolved: ocfs2: fix listxattr handling when the buffer is full [BUG] If an OCFS2 inode has both inline and block-based xattrs, listxattr() can return a size larger than the caller's buffer when the inline names consume that buffer exactly. kernel BUG at mm/usercopy.c:102! Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI RIP: 0010:usercopy_abort+0xb7/0xd0 mm/usercopy.c:102 Call Trace: __check_heap_object+0xe3/0x120 mm/slub.c:8243 check_heap_object mm/usercopy.c:196 [inline] __check_object_size mm/usercopy.c:250 [inline] __check_object_size+0x5c5/0x780 mm/usercopy.c:215 check_object_size include/linux/ucopysize.h:22 [inline] check_copy_size include/linux/ucopysize.h:59 [inline] copy_to_user include/linux/uaccess.h:219 [inline] listxattr+0xb0/0x170 fs/xattr.c:926 filename_listxattr fs/xattr.c:958 [inline] path_listxattrat+0x137/0x320 fs/xattr.c:988 __do_sys_listxattr fs/xattr.c:1001 [inline] __se_sys_listxattr fs/xattr.c:998 [inline] __x64_sys_listxattr+0x7f/0xd0 fs/xattr.c:998 ... [CAUSE] Commit 936b8834366e ("ocfs2: Refactor xattr list and remove ocfs2_xattr_handler().") replaced the old per-handler list accounting with ocfs2_xattr_list_entry(), but it kept using size == 0 to detect probe mode. That assumption stops being true once ocfs2_listxattr() finishes the inline-xattr pass. If the inline names fill the caller buffer exactly, the block-xattr pass runs with a non-NULL buffer and a remaining size of zero. ocfs2_xattr_list_entry() then skips the bounds check, keeps counting block names, and returns a positive size larger than the supplied buffer. [FIX] Detect probe mode by testing whether the destination buffer pointer is NULL instead of whether the remaining size is zero. That restores the pre-refactor behavior and matches the OCFS2 getxattr helpers. Once the remaining buffer reaches zero while more names are left, the block-xattr pass now returns -ERANGE instead of reporting a size larger than the allocated list buffer.

Severity

7.1 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Assigner

Linux

References

8 references

URL	Tags
https://git.kernel.org/stable/c/a35a1c2b170b5b578…
https://git.kernel.org/stable/c/2323084c17370304f…
https://git.kernel.org/stable/c/6f702b00b8124c5d3…
https://git.kernel.org/stable/c/d919b905939eda933…
https://git.kernel.org/stable/c/46e66fefb83811958…
https://git.kernel.org/stable/c/2685df8577a38d83b…
https://git.kernel.org/stable/c/50033ec1350fe68ab…
https://git.kernel.org/stable/c/d12f558e6200b3f47…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 936b8834366ec05f2a6993f73afd8348cac9718e , < a35a1c2b170b5b578b1b3fecb95694796552af9a (git) Affected: 936b8834366ec05f2a6993f73afd8348cac9718e , < 2323084c17370304f49c84b354fe7b3edbb264fe (git) Affected: 936b8834366ec05f2a6993f73afd8348cac9718e , < 6f702b00b8124c5d3525f19172934544826a114d (git) Affected: 936b8834366ec05f2a6993f73afd8348cac9718e , < d919b905939eda93393e3572900ff70dbad2b47f (git) Affected: 936b8834366ec05f2a6993f73afd8348cac9718e , < 46e66fefb83811958127bc9ad736983ec629d82b (git) Affected: 936b8834366ec05f2a6993f73afd8348cac9718e , < 2685df8577a38d83b367c8cf52eda9dc286959ff (git) Affected: 936b8834366ec05f2a6993f73afd8348cac9718e , < 50033ec1350fe68abdc63b950ced7ae57364b77a (git) Affected: 936b8834366ec05f2a6993f73afd8348cac9718e , < d12f558e6200b3f47dbef9331ed6d115d2410e59 (git)
Linux	Linux	Affected: 2.6.28 Unaffected: 0 , < 2.6.28 (semver) Unaffected: 5.10.258 , ≤ 5.10.* (semver) Unaffected: 5.15.209 , ≤ 5.15.* (semver) Unaffected: 6.1.175 , ≤ 6.1.* (semver) Unaffected: 6.6.141 , ≤ 6.6.* (semver) Unaffected: 6.12.91 , ≤ 6.12.* (semver) Unaffected: 6.18.33 , ≤ 6.18.* (semver) Unaffected: 7.0.10 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix)

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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nocfs2: fix listxattr handling when the buffer is full\n\n[BUG]\nIf an OCFS2 inode has both inline and block-based xattrs, listxattr()\ncan return a size larger than the caller\u0027s buffer when the inline names\nconsume that buffer exactly.\n\nkernel BUG at mm/usercopy.c:102!\nOops: invalid opcode: 0000 [#1] SMP KASAN NOPTI\nRIP: 0010:usercopy_abort+0xb7/0xd0 mm/usercopy.c:102\nCall Trace:\n __check_heap_object+0xe3/0x120 mm/slub.c:8243\n check_heap_object mm/usercopy.c:196 [inline]\n __check_object_size mm/usercopy.c:250 [inline]\n __check_object_size+0x5c5/0x780 mm/usercopy.c:215\n check_object_size include/linux/ucopysize.h:22 [inline]\n check_copy_size include/linux/ucopysize.h:59 [inline]\n copy_to_user include/linux/uaccess.h:219 [inline]\n listxattr+0xb0/0x170 fs/xattr.c:926\n filename_listxattr fs/xattr.c:958 [inline]\n path_listxattrat+0x137/0x320 fs/xattr.c:988\n __do_sys_listxattr fs/xattr.c:1001 [inline]\n __se_sys_listxattr fs/xattr.c:998 [inline]\n __x64_sys_listxattr+0x7f/0xd0 fs/xattr.c:998\n ...\n\n[CAUSE]\nCommit 936b8834366e (\"ocfs2: Refactor xattr list and remove\nocfs2_xattr_handler().\") replaced the old per-handler list accounting\nwith ocfs2_xattr_list_entry(), but it kept using size == 0 to detect\nprobe mode.\n\nThat assumption stops being true once ocfs2_listxattr() finishes the\ninline-xattr pass. If the inline names fill the caller buffer exactly,\nthe block-xattr pass runs with a non-NULL buffer and a remaining size of\nzero. ocfs2_xattr_list_entry() then skips the bounds check, keeps\ncounting block names, and returns a positive size larger than the\nsupplied buffer.\n\n[FIX]\nDetect probe mode by testing whether the destination buffer pointer is\nNULL instead of whether the remaining size is zero.\n\nThat restores the pre-refactor behavior and matches the OCFS2 getxattr\nhelpers. Once the remaining buffer reaches zero while more names are\nleft, the block-xattr pass now returns -ERANGE instead of reporting a\nsize larger than the allocated list buffer."
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            "version": "3.1"
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          "url": "https://git.kernel.org/stable/c/d12f558e6200b3f47dbef9331ed6d115d2410e59"
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      "title": "ocfs2: fix listxattr handling when the buffer is full",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-53041",
    "datePublished": "2026-06-24T16:29:47.501Z",
    "dateReserved": "2026-06-09T07:44:35.380Z",
    "dateUpdated": "2026-06-28T06:38:23.107Z",
    "state": "PUBLISHED"
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      "date": "2026-07-06",
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    "nvd": "{\"cve\":{\"id\":\"CVE-2026-53041\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-06-24T17:17:15.830\",\"lastModified\":\"2026-06-28T08:16:30.773\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nocfs2: fix listxattr handling when the buffer is full\\n\\n[BUG]\\nIf an OCFS2 inode has both inline and block-based xattrs, listxattr()\\ncan return a size larger than the caller\u0027s buffer when the inline names\\nconsume that buffer exactly.\\n\\nkernel BUG at mm/usercopy.c:102!\\nOops: invalid opcode: 0000 [#1] SMP KASAN NOPTI\\nRIP: 0010:usercopy_abort+0xb7/0xd0 mm/usercopy.c:102\\nCall Trace:\\n __check_heap_object+0xe3/0x120 mm/slub.c:8243\\n check_heap_object mm/usercopy.c:196 [inline]\\n __check_object_size mm/usercopy.c:250 [inline]\\n __check_object_size+0x5c5/0x780 mm/usercopy.c:215\\n check_object_size include/linux/ucopysize.h:22 [inline]\\n check_copy_size include/linux/ucopysize.h:59 [inline]\\n copy_to_user include/linux/uaccess.h:219 [inline]\\n listxattr+0xb0/0x170 fs/xattr.c:926\\n filename_listxattr fs/xattr.c:958 [inline]\\n path_listxattrat+0x137/0x320 fs/xattr.c:988\\n __do_sys_listxattr fs/xattr.c:1001 [inline]\\n __se_sys_listxattr fs/xattr.c:998 [inline]\\n __x64_sys_listxattr+0x7f/0xd0 fs/xattr.c:998\\n ...\\n\\n[CAUSE]\\nCommit 936b8834366e (\\\"ocfs2: Refactor xattr list and remove\\nocfs2_xattr_handler().\\\") replaced the old per-handler list accounting\\nwith ocfs2_xattr_list_entry(), but it kept using size == 0 to detect\\nprobe mode.\\n\\nThat assumption stops being true once ocfs2_listxattr() finishes the\\ninline-xattr pass. If the inline names fill the caller buffer exactly,\\nthe block-xattr pass runs with a non-NULL buffer and a remaining size of\\nzero. ocfs2_xattr_list_entry() then skips the bounds check, keeps\\ncounting block names, and returns a positive size larger than the\\nsupplied buffer.\\n\\n[FIX]\\nDetect probe mode by testing whether the destination buffer pointer is\\nNULL instead of whether the remaining size is zero.\\n\\nThat restores the pre-refactor behavior and matches the OCFS2 getxattr\\nhelpers. Once the remaining buffer reaches zero while more names are\\nleft, the block-xattr pass now returns -ERANGE instead of reporting a\\nsize larger than the allocated list buffer.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"fs/ocfs2/xattr.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"936b8834366ec05f2a6993f73afd8348cac9718e\",\"lessThan\":\"a35a1c2b170b5b578b1b3fecb95694796552af9a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"936b8834366ec05f2a6993f73afd8348cac9718e\",\"lessThan\":\"2323084c17370304f49c84b354fe7b3edbb264fe\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"936b8834366ec05f2a6993f73afd8348cac9718e\",\"lessThan\":\"6f702b00b8124c5d3525f19172934544826a114d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"936b8834366ec05f2a6993f73afd8348cac9718e\",\"lessThan\":\"d919b905939eda93393e3572900ff70dbad2b47f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"936b8834366ec05f2a6993f73afd8348cac9718e\",\"lessThan\":\"46e66fefb83811958127bc9ad736983ec629d82b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"936b8834366ec05f2a6993f73afd8348cac9718e\",\"lessThan\":\"2685df8577a38d83b367c8cf52eda9dc286959ff\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"936b8834366ec05f2a6993f73afd8348cac9718e\",\"lessThan\":\"50033ec1350fe68abdc63b950ced7ae57364b77a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"936b8834366ec05f2a6993f73afd8348cac9718e\",\"lessThan\":\"d12f558e6200b3f47dbef9331ed6d115d2410e59\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"fs/ocfs2/xattr.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"2.6.28\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"2.6.28\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.258\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.209\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.175\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.141\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.91\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.33\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.0.10\",\"lessThanOrEqual\":\"7.0.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H\",\"baseScore\":7.1,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.2}]},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/2323084c17370304f49c84b354fe7b3edbb264fe\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/2685df8577a38d83b367c8cf52eda9dc286959ff\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/46e66fefb83811958127bc9ad736983ec629d82b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/50033ec1350fe68abdc63b950ced7ae57364b77a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6f702b00b8124c5d3525f19172934544826a114d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a35a1c2b170b5b578b1b3fecb95694796552af9a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d12f558e6200b3f47dbef9331ed6d115d2410e59\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d919b905939eda93393e3572900ff70dbad2b47f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}

FKIE_CVE-2026-53041

Vulnerability from fkie_nvd - Published: 2026-06-24 17:17 - Updated: 2026-06-28 08:16

Severity

7.1 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Summary

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/2323084c17370304f49c84b354fe7b3edbb264fe
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/2685df8577a38d83b367c8cf52eda9dc286959ff
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/46e66fefb83811958127bc9ad736983ec629d82b
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/50033ec1350fe68abdc63b950ced7ae57364b77a
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/6f702b00b8124c5d3525f19172934544826a114d
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/a35a1c2b170b5b578b1b3fecb95694796552af9a
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d12f558e6200b3f47dbef9331ed6d115d2410e59
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d919b905939eda93393e3572900ff70dbad2b47f

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/ocfs2/xattr.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "a35a1c2b170b5b578b1b3fecb95694796552af9a",
              "status": "affected",
              "version": "936b8834366ec05f2a6993f73afd8348cac9718e",
              "versionType": "git"
            },
            {
              "lessThan": "2323084c17370304f49c84b354fe7b3edbb264fe",
              "status": "affected",
              "version": "936b8834366ec05f2a6993f73afd8348cac9718e",
              "versionType": "git"
            },
            {
              "lessThan": "6f702b00b8124c5d3525f19172934544826a114d",
              "status": "affected",
              "version": "936b8834366ec05f2a6993f73afd8348cac9718e",
              "versionType": "git"
            },
            {
              "lessThan": "d919b905939eda93393e3572900ff70dbad2b47f",
              "status": "affected",
              "version": "936b8834366ec05f2a6993f73afd8348cac9718e",
              "versionType": "git"
            },
            {
              "lessThan": "46e66fefb83811958127bc9ad736983ec629d82b",
              "status": "affected",
              "version": "936b8834366ec05f2a6993f73afd8348cac9718e",
              "versionType": "git"
            },
            {
              "lessThan": "2685df8577a38d83b367c8cf52eda9dc286959ff",
              "status": "affected",
              "version": "936b8834366ec05f2a6993f73afd8348cac9718e",
              "versionType": "git"
            },
            {
              "lessThan": "50033ec1350fe68abdc63b950ced7ae57364b77a",
              "status": "affected",
              "version": "936b8834366ec05f2a6993f73afd8348cac9718e",
              "versionType": "git"
            },
            {
              "lessThan": "d12f558e6200b3f47dbef9331ed6d115d2410e59",
              "status": "affected",
              "version": "936b8834366ec05f2a6993f73afd8348cac9718e",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/ocfs2/xattr.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.28"
            },
            {
              "lessThan": "2.6.28",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.258",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.209",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.175",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.141",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.91",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.33",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nocfs2: fix listxattr handling when the buffer is full\n\n[BUG]\nIf an OCFS2 inode has both inline and block-based xattrs, listxattr()\ncan return a size larger than the caller\u0027s buffer when the inline names\nconsume that buffer exactly.\n\nkernel BUG at mm/usercopy.c:102!\nOops: invalid opcode: 0000 [#1] SMP KASAN NOPTI\nRIP: 0010:usercopy_abort+0xb7/0xd0 mm/usercopy.c:102\nCall Trace:\n __check_heap_object+0xe3/0x120 mm/slub.c:8243\n check_heap_object mm/usercopy.c:196 [inline]\n __check_object_size mm/usercopy.c:250 [inline]\n __check_object_size+0x5c5/0x780 mm/usercopy.c:215\n check_object_size include/linux/ucopysize.h:22 [inline]\n check_copy_size include/linux/ucopysize.h:59 [inline]\n copy_to_user include/linux/uaccess.h:219 [inline]\n listxattr+0xb0/0x170 fs/xattr.c:926\n filename_listxattr fs/xattr.c:958 [inline]\n path_listxattrat+0x137/0x320 fs/xattr.c:988\n __do_sys_listxattr fs/xattr.c:1001 [inline]\n __se_sys_listxattr fs/xattr.c:998 [inline]\n __x64_sys_listxattr+0x7f/0xd0 fs/xattr.c:998\n ...\n\n[CAUSE]\nCommit 936b8834366e (\"ocfs2: Refactor xattr list and remove\nocfs2_xattr_handler().\") replaced the old per-handler list accounting\nwith ocfs2_xattr_list_entry(), but it kept using size == 0 to detect\nprobe mode.\n\nThat assumption stops being true once ocfs2_listxattr() finishes the\ninline-xattr pass. If the inline names fill the caller buffer exactly,\nthe block-xattr pass runs with a non-NULL buffer and a remaining size of\nzero. ocfs2_xattr_list_entry() then skips the bounds check, keeps\ncounting block names, and returns a positive size larger than the\nsupplied buffer.\n\n[FIX]\nDetect probe mode by testing whether the destination buffer pointer is\nNULL instead of whether the remaining size is zero.\n\nThat restores the pre-refactor behavior and matches the OCFS2 getxattr\nhelpers. Once the remaining buffer reaches zero while more names are\nleft, the block-xattr pass now returns -ERANGE instead of reporting a\nsize larger than the allocated list buffer."
    }
  ],
  "id": "CVE-2026-53041",
  "lastModified": "2026-06-28T08:16:30.773",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.1,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.2,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-06-24T17:17:15.830",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/2323084c17370304f49c84b354fe7b3edbb264fe"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/2685df8577a38d83b367c8cf52eda9dc286959ff"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/46e66fefb83811958127bc9ad736983ec629d82b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/50033ec1350fe68abdc63b950ced7ae57364b77a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6f702b00b8124c5d3525f19172934544826a114d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a35a1c2b170b5b578b1b3fecb95694796552af9a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d12f558e6200b3f47dbef9331ed6d115d2410e59"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d919b905939eda93393e3572900ff70dbad2b47f"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}

GHSA-GMX4-G5VQ-2X9X

Vulnerability from github – Published: 2026-06-24 18:32 – Updated: 2026-06-28 09:31

Details

In the Linux kernel, the following vulnerability has been resolved:

ocfs2: fix listxattr handling when the buffer is full

[BUG] If an OCFS2 inode has both inline and block-based xattrs, listxattr() can return a size larger than the caller's buffer when the inline names consume that buffer exactly.

kernel BUG at mm/usercopy.c:102! Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI RIP: 0010:usercopy_abort+0xb7/0xd0 mm/usercopy.c:102 Call Trace: __check_heap_object+0xe3/0x120 mm/slub.c:8243 check_heap_object mm/usercopy.c:196 [inline] __check_object_size mm/usercopy.c:250 [inline] __check_object_size+0x5c5/0x780 mm/usercopy.c:215 check_object_size include/linux/ucopysize.h:22 [inline] check_copy_size include/linux/ucopysize.h:59 [inline] copy_to_user include/linux/uaccess.h:219 [inline] listxattr+0xb0/0x170 fs/xattr.c:926 filename_listxattr fs/xattr.c:958 [inline] path_listxattrat+0x137/0x320 fs/xattr.c:988 __do_sys_listxattr fs/xattr.c:1001 [inline] __se_sys_listxattr fs/xattr.c:998 [inline] __x64_sys_listxattr+0x7f/0xd0 fs/xattr.c:998 ...

[CAUSE] Commit 936b8834366e ("ocfs2: Refactor xattr list and remove ocfs2_xattr_handler().") replaced the old per-handler list accounting with ocfs2_xattr_list_entry(), but it kept using size == 0 to detect probe mode.

That assumption stops being true once ocfs2_listxattr() finishes the inline-xattr pass. If the inline names fill the caller buffer exactly, the block-xattr pass runs with a non-NULL buffer and a remaining size of zero. ocfs2_xattr_list_entry() then skips the bounds check, keeps counting block names, and returns a positive size larger than the supplied buffer.

[FIX] Detect probe mode by testing whether the destination buffer pointer is NULL instead of whether the remaining size is zero.

That restores the pre-refactor behavior and matches the OCFS2 getxattr helpers. Once the remaining buffer reaches zero while more names are left, the block-xattr pass now returns -ERANGE instead of reporting a size larger than the allocated list buffer.

Severity

7.1 (High)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-53041"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-24T17:17:15Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nocfs2: fix listxattr handling when the buffer is full\n\n[BUG]\nIf an OCFS2 inode has both inline and block-based xattrs, listxattr()\ncan return a size larger than the caller\u0027s buffer when the inline names\nconsume that buffer exactly.\n\nkernel BUG at mm/usercopy.c:102!\nOops: invalid opcode: 0000 [#1] SMP KASAN NOPTI\nRIP: 0010:usercopy_abort+0xb7/0xd0 mm/usercopy.c:102\nCall Trace:\n __check_heap_object+0xe3/0x120 mm/slub.c:8243\n check_heap_object mm/usercopy.c:196 [inline]\n __check_object_size mm/usercopy.c:250 [inline]\n __check_object_size+0x5c5/0x780 mm/usercopy.c:215\n check_object_size include/linux/ucopysize.h:22 [inline]\n check_copy_size include/linux/ucopysize.h:59 [inline]\n copy_to_user include/linux/uaccess.h:219 [inline]\n listxattr+0xb0/0x170 fs/xattr.c:926\n filename_listxattr fs/xattr.c:958 [inline]\n path_listxattrat+0x137/0x320 fs/xattr.c:988\n __do_sys_listxattr fs/xattr.c:1001 [inline]\n __se_sys_listxattr fs/xattr.c:998 [inline]\n __x64_sys_listxattr+0x7f/0xd0 fs/xattr.c:998\n ...\n\n[CAUSE]\nCommit 936b8834366e (\"ocfs2: Refactor xattr list and remove\nocfs2_xattr_handler().\") replaced the old per-handler list accounting\nwith ocfs2_xattr_list_entry(), but it kept using size == 0 to detect\nprobe mode.\n\nThat assumption stops being true once ocfs2_listxattr() finishes the\ninline-xattr pass. If the inline names fill the caller buffer exactly,\nthe block-xattr pass runs with a non-NULL buffer and a remaining size of\nzero. ocfs2_xattr_list_entry() then skips the bounds check, keeps\ncounting block names, and returns a positive size larger than the\nsupplied buffer.\n\n[FIX]\nDetect probe mode by testing whether the destination buffer pointer is\nNULL instead of whether the remaining size is zero.\n\nThat restores the pre-refactor behavior and matches the OCFS2 getxattr\nhelpers. Once the remaining buffer reaches zero while more names are\nleft, the block-xattr pass now returns -ERANGE instead of reporting a\nsize larger than the allocated list buffer.",
  "id": "GHSA-gmx4-g5vq-2x9x",
  "modified": "2026-06-28T09:31:39Z",
  "published": "2026-06-24T18:32:44Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53041"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2323084c17370304f49c84b354fe7b3edbb264fe"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2685df8577a38d83b367c8cf52eda9dc286959ff"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/46e66fefb83811958127bc9ad736983ec629d82b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/50033ec1350fe68abdc63b950ced7ae57364b77a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6f702b00b8124c5d3525f19172934544826a114d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a35a1c2b170b5b578b1b3fecb95694796552af9a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d12f558e6200b3f47dbef9331ed6d115d2410e59"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d919b905939eda93393e3572900ff70dbad2b47f"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

MSRC_CVE-2026-53041

Vulnerability from csaf_microsoft - Published: 2026-06-02 00:00 - Updated: 2026-07-02 14:45

Summary

ocfs2: fix listxattr handling when the buffer is full

Notes

Additional Resources: To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle

Disclaimer: The information provided in the Microsoft Knowledge Base is provided \"as is\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.

CVE-2026-53041

Affected products

Known not affected 1 product

Product	Identifier	Version	Remediation
Unresolved product id: 17084-1		—

References

4 references

URL	Category
https://msrc.microsoft.com/csaf/vex/2026/msrc_cve…	self
https://support.microsoft.com/lifecycle	external
https://www.first.org/cvss	external
https://msrc.microsoft.com/csaf/vex/2026/msrc_cve…	self

JSON

To clipboard

{
  "document": {
    "category": "csaf_vex",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Public",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en-US",
    "notes": [
      {
        "category": "general",
        "text": "To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle",
        "title": "Additional Resources"
      },
      {
        "category": "legal_disclaimer",
        "text": "The information provided in the Microsoft Knowledge Base is provided \\\"as is\\\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.",
        "title": "Disclaimer"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "secure@microsoft.com",
      "name": "Microsoft Security Response Center",
      "namespace": "https://msrc.microsoft.com"
    },
    "references": [
      {
        "category": "self",
        "summary": "CVE-2026-53041 ocfs2: fix listxattr handling when the buffer is full - VEX",
        "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-53041.json"
      },
      {
        "category": "external",
        "summary": "Microsoft Support Lifecycle",
        "url": "https://support.microsoft.com/lifecycle"
      },
      {
        "category": "external",
        "summary": "Common Vulnerability Scoring System",
        "url": "https://www.first.org/cvss"
      }
    ],
    "title": "ocfs2: fix listxattr handling when the buffer is full",
    "tracking": {
      "current_release_date": "2026-07-02T14:45:43.000Z",
      "generator": {
        "date": "2026-07-03T07:14:17.385Z",
        "engine": {
          "name": "MSRC Generator",
          "version": "1.0"
        }
      },
      "id": "msrc_CVE-2026-53041",
      "initial_release_date": "2026-06-02T00:00:00.000Z",
      "revision_history": [
        {
          "date": "2026-06-27T01:14:46.000Z",
          "legacy_version": "1",
          "number": "1",
          "summary": "Information published."
        },
        {
          "date": "2026-07-02T14:45:43.000Z",
          "legacy_version": "2",
          "number": "2",
          "summary": "Information published."
        }
      ],
      "status": "final",
      "version": "2"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version",
                "name": "3.0",
                "product": {
                  "name": "Azure Linux 3.0",
                  "product_id": "17084"
                }
              }
            ],
            "category": "product_name",
            "name": "Azure Linux"
          },
          {
            "category": "product_name",
            "name": "azl3 kernel 0:6.6.139.1-1.azl3",
            "product": {
              "name": "azl3 kernel 0:6.6.139.1-1.azl3",
              "product_id": "1"
            }
          }
        ],
        "category": "vendor",
        "name": "Microsoft"
      }
    ],
    "relationships": [
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "azl3 kernel 0:6.6.139.1-1.azl3 as a component of Azure Linux 3.0",
          "product_id": "17084-1"
        },
        "product_reference": "1",
        "relates_to_product_reference": "17084"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-53041",
      "flags": [
        {
          "label": "vulnerable_code_not_present",
          "product_ids": [
            "17084-1"
          ]
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "Linux",
          "title": "Assigning CNA"
        }
      ],
      "product_status": {
        "known_not_affected": [
          "17084-1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-53041 ocfs2: fix listxattr handling when the buffer is full - VEX",
          "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-53041.json"
        }
      ],
      "title": "ocfs2: fix listxattr handling when the buffer is full"
    }
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

CVE-2026-53041 (GCVE-0-2026-53041)

FKIE_CVE-2026-53041

GHSA-GMX4-G5VQ-2X9X

MSRC_CVE-2026-53041

Tags

Sightings

Nomenclature