CVE-2026-52961 (GCVE-0-2026-52961)

Vulnerability from cvelistv5 – Published: 2026-06-24 16:28 – Updated: 2026-06-24 16:28
VLAI
Title
ceph: fix BUG_ON in __ceph_build_xattrs_blob() due to stale blob size
Summary
In the Linux kernel, the following vulnerability has been resolved: ceph: fix BUG_ON in __ceph_build_xattrs_blob() due to stale blob size The generic/642 test-case can reproduce the kernel crash: [40243.605254] ------------[ cut here ]------------ [40243.605956] kernel BUG at fs/ceph/xattr.c:918! [40243.607142] Oops: invalid opcode: 0000 [#1] SMP PTI [40243.608067] CPU: 7 UID: 0 PID: 498762 Comm: kworker/7:1 Not tainted 7.0.0-rc7+ #3 PREEMPT(full) [40243.609700] Hardware name: QEMU Ubuntu 25.10 PC v2 (i440FX + PIIX, + 10.1 machine, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [40243.611820] Workqueue: ceph-msgr ceph_con_workfn [40243.612715] RIP: 0010:__ceph_build_xattrs_blob+0x1b8/0x1e0 [40243.613731] Code: 0f 84 82 fe ff ff e9 cf 8e 56 ff 48 8d 65 e8 31 c0 5b 41 5c 41 5d 5d 31 d2 31 c9 31 f6 31 ff 45 31 c0 45 31 c9 c3 cc cc cc cc <0f> 0b 4c 8b 62 08 41 8b 85 24 07 00 00 49 83 c4 04 41 89 44 24 fc [40243.616888] RSP: 0018:ffffcc80c4d4b688 EFLAGS: 00010287 [40243.617773] RAX: 0000000000010026 RBX: 0000000000000001 RCX: 0000000000000000 [40243.618928] RDX: ffff8a773798dee0 RSI: 0000000000000000 RDI: 0000000000000000 [40243.620158] RBP: ffffcc80c4d4b6a0 R08: 0000000000000000 R09: 0000000000000000 [40243.621573] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8a75f3b58000 [40243.622907] R13: ffff8a75f3b58000 R14: 0000000000000080 R15: 000000000000bffd [40243.624054] FS: 0000000000000000(0000) GS:ffff8a787d1b4000(0000) knlGS:0000000000000000 [40243.625331] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [40243.626269] CR2: 000072f390b623c0 CR3: 000000011c02a003 CR4: 0000000000372ef0 [40243.627408] Call Trace: [40243.627839] <TASK> [40243.628188] __prep_cap+0x3fd/0x4a0 [40243.628789] ? do_raw_spin_unlock+0x4e/0xe0 [40243.629474] ceph_check_caps+0x46a/0xc80 [40243.630094] ? __lock_acquire+0x4a2/0x2650 [40243.630773] ? find_held_lock+0x31/0x90 [40243.631347] ? handle_cap_grant+0x79f/0x1060 [40243.632068] ? lock_release+0xd9/0x300 [40243.632696] ? __mutex_unlock_slowpath+0x3e/0x340 [40243.633429] ? lock_release+0xd9/0x300 [40243.634052] handle_cap_grant+0xcf6/0x1060 [40243.634745] ceph_handle_caps+0x122b/0x2110 [40243.635415] mds_dispatch+0x5bd/0x2160 [40243.636034] ? ceph_con_process_message+0x65/0x190 [40243.636828] ? lock_release+0xd9/0x300 [40243.637431] ceph_con_process_message+0x7a/0x190 [40243.638184] ? kfree+0x311/0x4f0 [40243.638749] ? kfree+0x311/0x4f0 [40243.639268] process_message+0x16/0x1a0 [40243.639915] ? sg_free_table+0x39/0x90 [40243.640572] ceph_con_v2_try_read+0xf58/0x2120 [40243.641255] ? lock_acquire+0xc8/0x300 [40243.641863] ceph_con_workfn+0x151/0x820 [40243.642493] process_one_work+0x22f/0x630 [40243.643093] ? process_one_work+0x254/0x630 [40243.643770] worker_thread+0x1e2/0x400 [40243.644332] ? __pfx_worker_thread+0x10/0x10 [40243.645020] kthread+0x109/0x140 [40243.645560] ? __pfx_kthread+0x10/0x10 [40243.646125] ret_from_fork+0x3f8/0x480 [40243.646752] ? __pfx_kthread+0x10/0x10 [40243.647316] ? __pfx_kthread+0x10/0x10 [40243.647919] ret_from_fork_asm+0x1a/0x30 [40243.648556] </TASK> [40243.648902] Modules linked in: overlay hctr2 libpolyval chacha libchacha adiantum libnh libpoly1305 essiv intel_rapl_msr intel_rapl_common intel_uncore_frequency_common skx_edac_common nfit kvm_intel kvm irqbypass joydev ghash_clmulni_intel aesni_intel rapl input_leds mac_hid psmouse vga16fb serio_raw vgastate floppy i2c_piix4 pata_acpi bochs qemu_fw_cfg i2c_smbus sch_fq_codel rbd dm_crypt msr parport_pc ppdev lp parport efi_pstore [40243.654766] ---[ end trace 0000000000000000 ]--- Commit d93231a6bc8a ("ceph: prevent a client from exceeding the MDS maximum xattr size") moved the required_blob_size computation to before the __build_xattrs() call, introducing a race. __build_xattrs() releases and reacquires i_ceph_lock during execution. In that window, handle_cap_grant() may update i_xattrs.blob with a newer MDS-provided blob and bump i_xattrs.version. When __bui ---truncated---
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: d93231a6bc8a452323d5fef16cca7107ce483a27 , < 7eb72425c4e3234926502eb262f9d6193ccd572c (git)
Affected: d93231a6bc8a452323d5fef16cca7107ce483a27 , < d5bd8b4e39cfa8b087448adcd48088065cd629d5 (git)
Affected: d93231a6bc8a452323d5fef16cca7107ce483a27 , < 368d21ae9081c93497b1c8163bed3eddcb2443ff (git)
Affected: d93231a6bc8a452323d5fef16cca7107ce483a27 , < 0c22d9511cbde746622f8e4c11aaa63fe76d45f9 (git)
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Linux Linux Affected: 6.0
Unaffected: 0 , < 6.0 (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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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/ceph/xattr.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "7eb72425c4e3234926502eb262f9d6193ccd572c",
              "status": "affected",
              "version": "d93231a6bc8a452323d5fef16cca7107ce483a27",
              "versionType": "git"
            },
            {
              "lessThan": "d5bd8b4e39cfa8b087448adcd48088065cd629d5",
              "status": "affected",
              "version": "d93231a6bc8a452323d5fef16cca7107ce483a27",
              "versionType": "git"
            },
            {
              "lessThan": "368d21ae9081c93497b1c8163bed3eddcb2443ff",
              "status": "affected",
              "version": "d93231a6bc8a452323d5fef16cca7107ce483a27",
              "versionType": "git"
            },
            {
              "lessThan": "0c22d9511cbde746622f8e4c11aaa63fe76d45f9",
              "status": "affected",
              "version": "d93231a6bc8a452323d5fef16cca7107ce483a27",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/ceph/xattr.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.0"
            },
            {
              "lessThan": "6.0",
              "status": "unaffected",
              "version": "0",
              "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"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.91",
                  "versionStartIncluding": "6.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.33",
                  "versionStartIncluding": "6.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0.10",
                  "versionStartIncluding": "6.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1",
                  "versionStartIncluding": "6.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nceph: fix BUG_ON in __ceph_build_xattrs_blob() due to stale blob size\n\nThe generic/642 test-case can reproduce the kernel crash:\n\n[40243.605254] ------------[ cut here ]------------\n[40243.605956] kernel BUG at fs/ceph/xattr.c:918!\n[40243.607142] Oops: invalid opcode: 0000 [#1] SMP PTI\n[40243.608067] CPU: 7 UID: 0 PID: 498762 Comm: kworker/7:1 Not tainted 7.0.0-rc7+ #3 PREEMPT(full)\n[40243.609700] Hardware name: QEMU Ubuntu 25.10 PC v2 (i440FX + PIIX, + 10.1 machine, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\n[40243.611820] Workqueue: ceph-msgr ceph_con_workfn\n[40243.612715] RIP: 0010:__ceph_build_xattrs_blob+0x1b8/0x1e0\n[40243.613731] Code: 0f 84 82 fe ff ff e9 cf 8e 56 ff 48 8d 65 e8 31 c0 5b 41 5c 41 5d 5d 31 d2 31 c9 31 f6 31 ff 45 31 c0 45 31 c9 c3 cc cc cc cc \u003c0f\u003e 0b 4c 8b 62 08 41 8b 85 24 07 00 00 49 83 c4 04 41 89 44 24 fc\n[40243.616888] RSP: 0018:ffffcc80c4d4b688 EFLAGS: 00010287\n[40243.617773] RAX: 0000000000010026 RBX: 0000000000000001 RCX: 0000000000000000\n[40243.618928] RDX: ffff8a773798dee0 RSI: 0000000000000000 RDI: 0000000000000000\n[40243.620158] RBP: ffffcc80c4d4b6a0 R08: 0000000000000000 R09: 0000000000000000\n[40243.621573] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8a75f3b58000\n[40243.622907] R13: ffff8a75f3b58000 R14: 0000000000000080 R15: 000000000000bffd\n[40243.624054] FS:  0000000000000000(0000) GS:ffff8a787d1b4000(0000) knlGS:0000000000000000\n[40243.625331] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[40243.626269] CR2: 000072f390b623c0 CR3: 000000011c02a003 CR4: 0000000000372ef0\n[40243.627408] Call Trace:\n[40243.627839]  \u003cTASK\u003e\n[40243.628188]  __prep_cap+0x3fd/0x4a0\n[40243.628789]  ? do_raw_spin_unlock+0x4e/0xe0\n[40243.629474]  ceph_check_caps+0x46a/0xc80\n[40243.630094]  ? __lock_acquire+0x4a2/0x2650\n[40243.630773]  ? find_held_lock+0x31/0x90\n[40243.631347]  ? handle_cap_grant+0x79f/0x1060\n[40243.632068]  ? lock_release+0xd9/0x300\n[40243.632696]  ? __mutex_unlock_slowpath+0x3e/0x340\n[40243.633429]  ? lock_release+0xd9/0x300\n[40243.634052]  handle_cap_grant+0xcf6/0x1060\n[40243.634745]  ceph_handle_caps+0x122b/0x2110\n[40243.635415]  mds_dispatch+0x5bd/0x2160\n[40243.636034]  ? ceph_con_process_message+0x65/0x190\n[40243.636828]  ? lock_release+0xd9/0x300\n[40243.637431]  ceph_con_process_message+0x7a/0x190\n[40243.638184]  ? kfree+0x311/0x4f0\n[40243.638749]  ? kfree+0x311/0x4f0\n[40243.639268]  process_message+0x16/0x1a0\n[40243.639915]  ? sg_free_table+0x39/0x90\n[40243.640572]  ceph_con_v2_try_read+0xf58/0x2120\n[40243.641255]  ? lock_acquire+0xc8/0x300\n[40243.641863]  ceph_con_workfn+0x151/0x820\n[40243.642493]  process_one_work+0x22f/0x630\n[40243.643093]  ? process_one_work+0x254/0x630\n[40243.643770]  worker_thread+0x1e2/0x400\n[40243.644332]  ? __pfx_worker_thread+0x10/0x10\n[40243.645020]  kthread+0x109/0x140\n[40243.645560]  ? __pfx_kthread+0x10/0x10\n[40243.646125]  ret_from_fork+0x3f8/0x480\n[40243.646752]  ? __pfx_kthread+0x10/0x10\n[40243.647316]  ? __pfx_kthread+0x10/0x10\n[40243.647919]  ret_from_fork_asm+0x1a/0x30\n[40243.648556]  \u003c/TASK\u003e\n[40243.648902] Modules linked in: overlay hctr2 libpolyval chacha libchacha adiantum libnh libpoly1305 essiv intel_rapl_msr intel_rapl_common intel_uncore_frequency_common skx_edac_common nfit kvm_intel kvm irqbypass joydev ghash_clmulni_intel aesni_intel rapl input_leds mac_hid psmouse vga16fb serio_raw vgastate floppy i2c_piix4 pata_acpi bochs qemu_fw_cfg i2c_smbus sch_fq_codel rbd dm_crypt msr parport_pc ppdev lp parport efi_pstore\n[40243.654766] ---[ end trace 0000000000000000 ]---\n\nCommit d93231a6bc8a (\"ceph: prevent a client from exceeding the MDS\nmaximum xattr size\") moved the required_blob_size computation to before\nthe __build_xattrs() call, introducing a race.\n\n__build_xattrs() releases and reacquires i_ceph_lock during execution.\nIn that window, handle_cap_grant() may update i_xattrs.blob with a\nnewer MDS-provided blob and bump i_xattrs.version.  When\n__bui\n---truncated---"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-24T16:28:41.836Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/7eb72425c4e3234926502eb262f9d6193ccd572c"
        },
        {
          "url": "https://git.kernel.org/stable/c/d5bd8b4e39cfa8b087448adcd48088065cd629d5"
        },
        {
          "url": "https://git.kernel.org/stable/c/368d21ae9081c93497b1c8163bed3eddcb2443ff"
        },
        {
          "url": "https://git.kernel.org/stable/c/0c22d9511cbde746622f8e4c11aaa63fe76d45f9"
        }
      ],
      "title": "ceph: fix BUG_ON in __ceph_build_xattrs_blob() due to stale blob size",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-52961",
    "datePublished": "2026-06-24T16:28:41.836Z",
    "dateReserved": "2026-06-09T07:44:35.374Z",
    "dateUpdated": "2026-06-24T16:28:41.836Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-52961",
      "date": "2026-08-24",
      "epss": "0.00183",
      "percentile": "0.07834"
    },
    "microsoft_vex": {
      "current_release_date": "2026-08-13T00:14:35.000Z",
      "cve": "CVE-2026-52961",
      "id": "msrc_CVE-2026-52961",
      "initial_release_date": "2026-06-27T01:13:44.000Z",
      "product_status:known_affected": "4",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "ceph: fix BUG_ON in __ceph_build_xattrs_blob() due to stale blob size",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-52961.json",
      "version": "4"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-52961\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-06-24T17:17:06.360\",\"lastModified\":\"2026-07-14T16:20:05.417\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nceph: fix BUG_ON in __ceph_build_xattrs_blob() due to stale blob size\\n\\nThe generic/642 test-case can reproduce the kernel crash:\\n\\n[40243.605254] ------------[ cut here ]------------\\n[40243.605956] kernel BUG at fs/ceph/xattr.c:918!\\n[40243.607142] Oops: invalid opcode: 0000 [#1] SMP PTI\\n[40243.608067] CPU: 7 UID: 0 PID: 498762 Comm: kworker/7:1 Not tainted 7.0.0-rc7+ #3 PREEMPT(full)\\n[40243.609700] Hardware name: QEMU Ubuntu 25.10 PC v2 (i440FX + PIIX, + 10.1 machine, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\\n[40243.611820] Workqueue: ceph-msgr ceph_con_workfn\\n[40243.612715] RIP: 0010:__ceph_build_xattrs_blob+0x1b8/0x1e0\\n[40243.613731] Code: 0f 84 82 fe ff ff e9 cf 8e 56 ff 48 8d 65 e8 31 c0 5b 41 5c 41 5d 5d 31 d2 31 c9 31 f6 31 ff 45 31 c0 45 31 c9 c3 cc cc cc cc \u003c0f\u003e 0b 4c 8b 62 08 41 8b 85 24 07 00 00 49 83 c4 04 41 89 44 24 fc\\n[40243.616888] RSP: 0018:ffffcc80c4d4b688 EFLAGS: 00010287\\n[40243.617773] RAX: 0000000000010026 RBX: 0000000000000001 RCX: 0000000000000000\\n[40243.618928] RDX: ffff8a773798dee0 RSI: 0000000000000000 RDI: 0000000000000000\\n[40243.620158] RBP: ffffcc80c4d4b6a0 R08: 0000000000000000 R09: 0000000000000000\\n[40243.621573] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8a75f3b58000\\n[40243.622907] R13: ffff8a75f3b58000 R14: 0000000000000080 R15: 000000000000bffd\\n[40243.624054] FS:  0000000000000000(0000) GS:ffff8a787d1b4000(0000) knlGS:0000000000000000\\n[40243.625331] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\n[40243.626269] CR2: 000072f390b623c0 CR3: 000000011c02a003 CR4: 0000000000372ef0\\n[40243.627408] Call Trace:\\n[40243.627839]  \u003cTASK\u003e\\n[40243.628188]  __prep_cap+0x3fd/0x4a0\\n[40243.628789]  ? do_raw_spin_unlock+0x4e/0xe0\\n[40243.629474]  ceph_check_caps+0x46a/0xc80\\n[40243.630094]  ? __lock_acquire+0x4a2/0x2650\\n[40243.630773]  ? find_held_lock+0x31/0x90\\n[40243.631347]  ? handle_cap_grant+0x79f/0x1060\\n[40243.632068]  ? lock_release+0xd9/0x300\\n[40243.632696]  ? __mutex_unlock_slowpath+0x3e/0x340\\n[40243.633429]  ? lock_release+0xd9/0x300\\n[40243.634052]  handle_cap_grant+0xcf6/0x1060\\n[40243.634745]  ceph_handle_caps+0x122b/0x2110\\n[40243.635415]  mds_dispatch+0x5bd/0x2160\\n[40243.636034]  ? ceph_con_process_message+0x65/0x190\\n[40243.636828]  ? lock_release+0xd9/0x300\\n[40243.637431]  ceph_con_process_message+0x7a/0x190\\n[40243.638184]  ? kfree+0x311/0x4f0\\n[40243.638749]  ? kfree+0x311/0x4f0\\n[40243.639268]  process_message+0x16/0x1a0\\n[40243.639915]  ? sg_free_table+0x39/0x90\\n[40243.640572]  ceph_con_v2_try_read+0xf58/0x2120\\n[40243.641255]  ? lock_acquire+0xc8/0x300\\n[40243.641863]  ceph_con_workfn+0x151/0x820\\n[40243.642493]  process_one_work+0x22f/0x630\\n[40243.643093]  ? process_one_work+0x254/0x630\\n[40243.643770]  worker_thread+0x1e2/0x400\\n[40243.644332]  ? __pfx_worker_thread+0x10/0x10\\n[40243.645020]  kthread+0x109/0x140\\n[40243.645560]  ? __pfx_kthread+0x10/0x10\\n[40243.646125]  ret_from_fork+0x3f8/0x480\\n[40243.646752]  ? __pfx_kthread+0x10/0x10\\n[40243.647316]  ? __pfx_kthread+0x10/0x10\\n[40243.647919]  ret_from_fork_asm+0x1a/0x30\\n[40243.648556]  \u003c/TASK\u003e\\n[40243.648902] Modules linked in: overlay hctr2 libpolyval chacha libchacha adiantum libnh libpoly1305 essiv intel_rapl_msr intel_rapl_common intel_uncore_frequency_common skx_edac_common nfit kvm_intel kvm irqbypass joydev ghash_clmulni_intel aesni_intel rapl input_leds mac_hid psmouse vga16fb serio_raw vgastate floppy i2c_piix4 pata_acpi bochs qemu_fw_cfg i2c_smbus sch_fq_codel rbd dm_crypt msr parport_pc ppdev lp parport efi_pstore\\n[40243.654766] ---[ end trace 0000000000000000 ]---\\n\\nCommit d93231a6bc8a (\\\"ceph: prevent a client from exceeding the MDS\\nmaximum xattr size\\\") moved the required_blob_size computation to before\\nthe __build_xattrs() call, introducing a race.\\n\\n__build_xattrs() releases and reacquires i_ceph_lock during execution.\\nIn that window, handle_cap_grant() may update i_xattrs.blob with a\\nnewer MDS-provided blob and bump i_xattrs.version.  When\\n__bui\\n---truncated---\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"fs/ceph/xattr.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"d93231a6bc8a452323d5fef16cca7107ce483a27\",\"lessThan\":\"7eb72425c4e3234926502eb262f9d6193ccd572c\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d93231a6bc8a452323d5fef16cca7107ce483a27\",\"lessThan\":\"d5bd8b4e39cfa8b087448adcd48088065cd629d5\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d93231a6bc8a452323d5fef16cca7107ce483a27\",\"lessThan\":\"368d21ae9081c93497b1c8163bed3eddcb2443ff\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d93231a6bc8a452323d5fef16cca7107ce483a27\",\"lessThan\":\"0c22d9511cbde746622f8e4c11aaa63fe76d45f9\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"fs/ceph/xattr.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.0\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.0\",\"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\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-617\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.0\",\"versionEndExcluding\":\"6.12.91\",\"matchCriteriaId\":\"896B2EC2-6E66-4010-9768-4CB388F782AE\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.13\",\"versionEndExcluding\":\"6.18.33\",\"matchCriteriaId\":\"96D99E49-380D-43AB-BDBA-25C3AD018A9C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.19\",\"versionEndExcluding\":\"7.0.10\",\"matchCriteriaId\":\"A13475D2-59BF-4716-94B5-7C1D239A2CF4\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"B1EF7059-E670-45F4-B422-54C40FA86390\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"0D38F0BF-A728-4133-A358-D44A2F7EE6D6\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"EC732D08-5F7B-46D9-B154-E60C7F4F0A97\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0c22d9511cbde746622f8e4c11aaa63fe76d45f9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/368d21ae9081c93497b1c8163bed3eddcb2443ff\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/7eb72425c4e3234926502eb262f9d6193ccd572c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/d5bd8b4e39cfa8b087448adcd48088065cd629d5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-07-14T18:05:08+00:00",
      "cve": "CVE-2026-52961",
      "id": "CVE-2026-52961",
      "initial_release_date": "2026-06-24T00:00:00+00:00",
      "product_status:known_affected": "232",
      "product_status:known_not_affected": "42",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: ceph: fix BUG_ON in __ceph_build_xattrs_blob() due to stale blob size",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-52961.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-07-30T16:41:48Z",
      "cve": "CVE-2026-52961",
      "id": "CVE-2026-52961",
      "initial_release_date": "2026-06-26T02:14:39Z",
      "product_status:known_affected": "472",
      "product_status:known_not_affected": "150",
      "product_status:recommended": "120",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-52961",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-52961.json",
      "version": "9"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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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.