GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

CVE-2026-80863 (GCVE-0-2026-80863)

Vulnerability from cvelistv5 – Published: 2026-09-04 15:55 – Updated: 2026-09-04 15:55
VLAI
Title
RDMA/rxe: Fix OOB in free_rd_atomic_resources()
Summary
In the Linux kernel, the following vulnerability has been resolved: RDMA/rxe: Fix OOB in free_rd_atomic_resources() free_rd_atomic_resources() iterates using qp->attr.max_dest_rd_atomic. Updating max_dest_rd_atomic before freeing the old array can make the free path walk past the old allocation and trigger a slab out-of-bounds write catched by KASAN: ================================================================== BUG: KASAN: slab-out-of-bounds in free_rd_atomic_resource drivers/infiniband/sw/rxe/rxe_qp.c:180 [inline] BUG: KASAN: slab-out-of-bounds in free_rd_atomic_resources drivers/infiniband/sw/rxe/rxe_qp.c:171 [inline] BUG: KASAN: slab-out-of-bounds in free_rd_atomic_resources drivers/infiniband/sw/rxe/rxe_qp.c:163 [inline] BUG: KASAN: slab-out-of-bounds in rxe_qp_from_attr+0x1e88/0x2150 drivers/infiniband/sw/rxe/rxe_qp.c:712 Write of size 4 at addr ffff88802b8dddb8 by task syz.3.451/11063 CPU: 0 UID: 0 PID: 11063 Comm: syz.3.451 Not tainted 7.1.0 #2 PREEMPT(full) Hardware name: QEMU Ubuntu 24.04 PC v2 (i440FX + PIIX, arch_caps fix, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Call Trace: <TASK> __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x10e/0x1f0 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0xf7/0x600 mm/kasan/report.c:482 kasan_report+0xe4/0x120 mm/kasan/report.c:595 free_rd_atomic_resource drivers/infiniband/sw/rxe/rxe_qp.c:180 [inline] free_rd_atomic_resources drivers/infiniband/sw/rxe/rxe_qp.c:171 [inline] free_rd_atomic_resources drivers/infiniband/sw/rxe/rxe_qp.c:163 [inline] rxe_qp_from_attr+0x1e88/0x2150 drivers/infiniband/sw/rxe/rxe_qp.c:712 rxe_modify_qp+0x1e2/0x530 drivers/infiniband/sw/rxe/rxe_verbs.c:623 ib_security_modify_qp+0x223/0xfa0 drivers/infiniband/core/security.c:625 _ib_modify_qp+0x333/0xec0 drivers/infiniband/core/verbs.c:1915 modify_qp+0x13ca/0x1940 drivers/infiniband/core/uverbs_cmd.c:1932 ib_uverbs_modify_qp+0xcb/0x120 drivers/infiniband/core/uverbs_cmd.c:1958 ib_uverbs_write+0xb86/0x1030 drivers/infiniband/core/uverbs_main.c:680 vfs_write+0x2aa/0x1070 fs/read_write.c:686 ksys_write+0x1f8/0x250 fs/read_write.c:740 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x116/0x800 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fefc75a70cd Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fefc8495018 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fefc7835fa0 RCX: 00007fefc75a70cd RDX: 0000000000000078 RSI: 0000200000000240 RDI: 0000000000000007 RBP: 00007fefc764f10f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fefc7836038 R14: 00007fefc7835fa0 R15: 00007ffcf0586aa0 </TASK> Allocated by task 11063: kasan_save_stack+0x33/0x60 mm/kasan/common.c:57 kasan_save_track+0x14/0x30 mm/kasan/common.c:78 poison_kmalloc_redzone mm/kasan/common.c:398 [inline] __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:415 kasan_kmalloc include/linux/kasan.h:263 [inline] __do_kmalloc_node mm/slub.c:5296 [inline] __kmalloc_noprof+0x32a/0x850 mm/slub.c:5308 kmalloc_noprof include/linux/slab.h:954 [inline] kzalloc_noprof include/linux/slab.h:1188 [inline] alloc_rd_atomic_resources drivers/infiniband/sw/rxe/rxe_qp.c:155 [inline] rxe_qp_from_attr+0x3f8/0x2150 drivers/infiniband/sw/rxe/rxe_qp.c:714 rxe_modify_qp+0x1e2/0x530 drivers/infiniband/sw/rxe/rxe_verbs.c:623 ib_security_modify_qp+0x223/0xfa0 drivers/infiniband/core/security.c:625 _ib_modify_qp+0x333/0xec0 drivers/infiniband/core/verbs.c:1915 modify_qp+0x13ca/0x1940 drivers/infiniband/core/uverbs_cmd.c:1932 ib_uverbs_modify_qp+0xcb/0x120 drivers/infiniband/core/uverbs_cmd.c:1958 ib_uverbs_write+0xb86/0x1030 drivers/infiniband/core/uverbs_ma ---truncated---
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f , < 142c8165b7974b40fa62c393653edb5c00b8b5fe (git)
Affected: b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f , < 30b90b55201902b2b8edcdbe2315ccd4c7547002 (git)
Affected: b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f , < 9b7d66ea88ae9395e42766b94a5c717b158b940a (git)
Affected: b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f , < f5e6580a3a16a83c743ad5a7c16922854a0d8b71 (git)
Affected: b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f , < bc6e943794515d2a8417b02597a27bd377468d04 (git)
Affected: b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f , < bdf5deccfbf9f556a08d1d2ef52e9e48f969e53e (git)
Affected: b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f , < 4e5f753e8c280278c09f68fe728abf846e2bdfc1 (git)
Affected: b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f , < d219e7a8eed3802970c3e4d243d79c70ef0a31bf (git)
Affected: b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f , < de329533792a373186d79dca1ca120f8fa0afd05 (git)
guessed Create a notification for this product.
Linux Linux Affected: 4.9
Unaffected: 0 , < 4.9 (semver)
Unaffected: 5.10.269 , ≤ 5.10.* (semver)
Unaffected: 5.15.220 , ≤ 5.15.* (semver)
Unaffected: 6.1.187 , ≤ 6.1.* (semver)
Unaffected: 6.6.156 , ≤ 6.6.* (semver)
Unaffected: 6.12.108 , ≤ 6.12.* (semver)
Unaffected: 6.18.49 , ≤ 6.18.* (semver)
Unaffected: 7.1.13 , ≤ 7.1.* (semver)
Unaffected: 7.2.3 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/sw/rxe/rxe_qp.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "142c8165b7974b40fa62c393653edb5c00b8b5fe",
              "status": "affected",
              "version": "b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f",
              "versionType": "git"
            },
            {
              "lessThan": "30b90b55201902b2b8edcdbe2315ccd4c7547002",
              "status": "affected",
              "version": "b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f",
              "versionType": "git"
            },
            {
              "lessThan": "9b7d66ea88ae9395e42766b94a5c717b158b940a",
              "status": "affected",
              "version": "b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f",
              "versionType": "git"
            },
            {
              "lessThan": "f5e6580a3a16a83c743ad5a7c16922854a0d8b71",
              "status": "affected",
              "version": "b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f",
              "versionType": "git"
            },
            {
              "lessThan": "bc6e943794515d2a8417b02597a27bd377468d04",
              "status": "affected",
              "version": "b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f",
              "versionType": "git"
            },
            {
              "lessThan": "bdf5deccfbf9f556a08d1d2ef52e9e48f969e53e",
              "status": "affected",
              "version": "b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f",
              "versionType": "git"
            },
            {
              "lessThan": "4e5f753e8c280278c09f68fe728abf846e2bdfc1",
              "status": "affected",
              "version": "b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f",
              "versionType": "git"
            },
            {
              "lessThan": "d219e7a8eed3802970c3e4d243d79c70ef0a31bf",
              "status": "affected",
              "version": "b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f",
              "versionType": "git"
            },
            {
              "lessThan": "de329533792a373186d79dca1ca120f8fa0afd05",
              "status": "affected",
              "version": "b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/sw/rxe/rxe_qp.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.9"
            },
            {
              "lessThan": "4.9",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.269",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.220",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.187",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.156",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.108",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.49",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.13",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.269",
                  "versionStartIncluding": "4.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.220",
                  "versionStartIncluding": "4.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.187",
                  "versionStartIncluding": "4.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.156",
                  "versionStartIncluding": "4.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.108",
                  "versionStartIncluding": "4.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.49",
                  "versionStartIncluding": "4.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.13",
                  "versionStartIncluding": "4.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.3",
                  "versionStartIncluding": "4.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc1",
                  "versionStartIncluding": "4.9",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/rxe: Fix OOB in free_rd_atomic_resources()\n\nfree_rd_atomic_resources() iterates using qp-\u003eattr.max_dest_rd_atomic.\nUpdating max_dest_rd_atomic before freeing the old array can make the\nfree path walk past the old allocation and trigger a slab out-of-bounds\nwrite catched by KASAN:\n==================================================================\nBUG: KASAN: slab-out-of-bounds in free_rd_atomic_resource drivers/infiniband/sw/rxe/rxe_qp.c:180 [inline]\nBUG: KASAN: slab-out-of-bounds in free_rd_atomic_resources drivers/infiniband/sw/rxe/rxe_qp.c:171 [inline]\nBUG: KASAN: slab-out-of-bounds in free_rd_atomic_resources drivers/infiniband/sw/rxe/rxe_qp.c:163 [inline]\nBUG: KASAN: slab-out-of-bounds in rxe_qp_from_attr+0x1e88/0x2150 drivers/infiniband/sw/rxe/rxe_qp.c:712\nWrite of size 4 at addr ffff88802b8dddb8 by task syz.3.451/11063\n\nCPU: 0 UID: 0 PID: 11063 Comm: syz.3.451 Not tainted 7.1.0 #2 PREEMPT(full)\nHardware name: QEMU Ubuntu 24.04 PC v2 (i440FX + PIIX, arch_caps fix, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\nCall Trace:\n \u003cTASK\u003e\n __dump_stack lib/dump_stack.c:94 [inline]\n dump_stack_lvl+0x10e/0x1f0 lib/dump_stack.c:120\n print_address_description mm/kasan/report.c:378 [inline]\n print_report+0xf7/0x600 mm/kasan/report.c:482\n kasan_report+0xe4/0x120 mm/kasan/report.c:595\n free_rd_atomic_resource drivers/infiniband/sw/rxe/rxe_qp.c:180 [inline]\n free_rd_atomic_resources drivers/infiniband/sw/rxe/rxe_qp.c:171 [inline]\n free_rd_atomic_resources drivers/infiniband/sw/rxe/rxe_qp.c:163 [inline]\n rxe_qp_from_attr+0x1e88/0x2150 drivers/infiniband/sw/rxe/rxe_qp.c:712\n rxe_modify_qp+0x1e2/0x530 drivers/infiniband/sw/rxe/rxe_verbs.c:623\n ib_security_modify_qp+0x223/0xfa0 drivers/infiniband/core/security.c:625\n _ib_modify_qp+0x333/0xec0 drivers/infiniband/core/verbs.c:1915\n modify_qp+0x13ca/0x1940 drivers/infiniband/core/uverbs_cmd.c:1932\n ib_uverbs_modify_qp+0xcb/0x120 drivers/infiniband/core/uverbs_cmd.c:1958\n ib_uverbs_write+0xb86/0x1030 drivers/infiniband/core/uverbs_main.c:680\n vfs_write+0x2aa/0x1070 fs/read_write.c:686\n ksys_write+0x1f8/0x250 fs/read_write.c:740\n do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n do_syscall_64+0x116/0x800 arch/x86/entry/syscall_64.c:94\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\nRIP: 0033:0x7fefc75a70cd\nCode: ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 \u003c48\u003e 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48\nRSP: 002b:00007fefc8495018 EFLAGS: 00000246 ORIG_RAX: 0000000000000001\nRAX: ffffffffffffffda RBX: 00007fefc7835fa0 RCX: 00007fefc75a70cd\nRDX: 0000000000000078 RSI: 0000200000000240 RDI: 0000000000000007\nRBP: 00007fefc764f10f R08: 0000000000000000 R09: 0000000000000000\nR10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000\nR13: 00007fefc7836038 R14: 00007fefc7835fa0 R15: 00007ffcf0586aa0\n \u003c/TASK\u003e\n\nAllocated by task 11063:\n kasan_save_stack+0x33/0x60 mm/kasan/common.c:57\n kasan_save_track+0x14/0x30 mm/kasan/common.c:78\n poison_kmalloc_redzone mm/kasan/common.c:398 [inline]\n __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:415\n kasan_kmalloc include/linux/kasan.h:263 [inline]\n __do_kmalloc_node mm/slub.c:5296 [inline]\n __kmalloc_noprof+0x32a/0x850 mm/slub.c:5308\n kmalloc_noprof include/linux/slab.h:954 [inline]\n kzalloc_noprof include/linux/slab.h:1188 [inline]\n alloc_rd_atomic_resources drivers/infiniband/sw/rxe/rxe_qp.c:155 [inline]\n rxe_qp_from_attr+0x3f8/0x2150 drivers/infiniband/sw/rxe/rxe_qp.c:714\n rxe_modify_qp+0x1e2/0x530 drivers/infiniband/sw/rxe/rxe_verbs.c:623\n ib_security_modify_qp+0x223/0xfa0 drivers/infiniband/core/security.c:625\n _ib_modify_qp+0x333/0xec0 drivers/infiniband/core/verbs.c:1915\n modify_qp+0x13ca/0x1940 drivers/infiniband/core/uverbs_cmd.c:1932\n ib_uverbs_modify_qp+0xcb/0x120 drivers/infiniband/core/uverbs_cmd.c:1958\n ib_uverbs_write+0xb86/0x1030 drivers/infiniband/core/uverbs_ma\n---truncated---"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-04T15:55:17.668Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/142c8165b7974b40fa62c393653edb5c00b8b5fe"
        },
        {
          "url": "https://git.kernel.org/stable/c/30b90b55201902b2b8edcdbe2315ccd4c7547002"
        },
        {
          "url": "https://git.kernel.org/stable/c/9b7d66ea88ae9395e42766b94a5c717b158b940a"
        },
        {
          "url": "https://git.kernel.org/stable/c/f5e6580a3a16a83c743ad5a7c16922854a0d8b71"
        },
        {
          "url": "https://git.kernel.org/stable/c/bc6e943794515d2a8417b02597a27bd377468d04"
        },
        {
          "url": "https://git.kernel.org/stable/c/bdf5deccfbf9f556a08d1d2ef52e9e48f969e53e"
        },
        {
          "url": "https://git.kernel.org/stable/c/4e5f753e8c280278c09f68fe728abf846e2bdfc1"
        },
        {
          "url": "https://git.kernel.org/stable/c/d219e7a8eed3802970c3e4d243d79c70ef0a31bf"
        },
        {
          "url": "https://git.kernel.org/stable/c/de329533792a373186d79dca1ca120f8fa0afd05"
        }
      ],
      "title": "RDMA/rxe: Fix OOB in free_rd_atomic_resources()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-80863",
    "datePublished": "2026-09-04T15:55:17.668Z",
    "dateReserved": "2026-08-26T14:34:25.798Z",
    "dateUpdated": "2026-09-04T15:55:17.668Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-80863",
      "date": "2026-09-18",
      "epss": "0.00182",
      "percentile": "0.08047"
    },
    "microsoft_vex": {
      "current_release_date": "2026-09-07T01:54:41.000Z",
      "cve": "CVE-2026-80863",
      "id": "msrc_CVE-2026-80863",
      "initial_release_date": "2026-09-07T01:54:41.000Z",
      "product_status:known_affected": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "RDMA/rxe: Fix OOB in free_rd_atomic_resources()",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-80863.json",
      "version": "1"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "product": "Linux",
                "programFiles": [
                  "drivers/infiniband/sw/rxe/rxe_qp.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "lessThan": "142c8165b7974b40fa62c393653edb5c00b8b5fe",
                    "status": "affected",
                    "version": "b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "30b90b55201902b2b8edcdbe2315ccd4c7547002",
                    "status": "affected",
                    "version": "b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "9b7d66ea88ae9395e42766b94a5c717b158b940a",
                    "status": "affected",
                    "version": "b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "f5e6580a3a16a83c743ad5a7c16922854a0d8b71",
                    "status": "affected",
                    "version": "b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "bc6e943794515d2a8417b02597a27bd377468d04",
                    "status": "affected",
                    "version": "b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "bdf5deccfbf9f556a08d1d2ef52e9e48f969e53e",
                    "status": "affected",
                    "version": "b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "4e5f753e8c280278c09f68fe728abf846e2bdfc1",
                    "status": "affected",
                    "version": "b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "d219e7a8eed3802970c3e4d243d79c70ef0a31bf",
                    "status": "affected",
                    "version": "b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "de329533792a373186d79dca1ca120f8fa0afd05",
                    "status": "affected",
                    "version": "b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f",
                    "versionType": "git"
                  }
                ]
              },
              {
                "defaultStatus": "affected",
                "product": "Linux",
                "programFiles": [
                  "drivers/infiniband/sw/rxe/rxe_qp.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "status": "affected",
                    "version": "4.9"
                  },
                  {
                    "lessThan": "4.9",
                    "status": "unaffected",
                    "version": "0",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "5.10.*",
                    "status": "unaffected",
                    "version": "5.10.269",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "5.15.*",
                    "status": "unaffected",
                    "version": "5.15.220",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.1.*",
                    "status": "unaffected",
                    "version": "6.1.187",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.6.*",
                    "status": "unaffected",
                    "version": "6.6.156",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.12.*",
                    "status": "unaffected",
                    "version": "6.12.108",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.18.*",
                    "status": "unaffected",
                    "version": "6.18.49",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "7.1.*",
                    "status": "unaffected",
                    "version": "7.1.13",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "7.2.*",
                    "status": "unaffected",
                    "version": "7.2.3",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "*",
                    "status": "unaffected",
                    "version": "7.3-rc1",
                    "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\nRDMA/rxe: Fix OOB in free_rd_atomic_resources()\n\nfree_rd_atomic_resources() iterates using qp-\u003eattr.max_dest_rd_atomic.\nUpdating max_dest_rd_atomic before freeing the old array can make the\nfree path walk past the old allocation and trigger a slab out-of-bounds\nwrite catched by KASAN:\n==================================================================\nBUG: KASAN: slab-out-of-bounds in free_rd_atomic_resource drivers/infiniband/sw/rxe/rxe_qp.c:180 [inline]\nBUG: KASAN: slab-out-of-bounds in free_rd_atomic_resources drivers/infiniband/sw/rxe/rxe_qp.c:171 [inline]\nBUG: KASAN: slab-out-of-bounds in free_rd_atomic_resources drivers/infiniband/sw/rxe/rxe_qp.c:163 [inline]\nBUG: KASAN: slab-out-of-bounds in rxe_qp_from_attr+0x1e88/0x2150 drivers/infiniband/sw/rxe/rxe_qp.c:712\nWrite of size 4 at addr ffff88802b8dddb8 by task syz.3.451/11063\n\nCPU: 0 UID: 0 PID: 11063 Comm: syz.3.451 Not tainted 7.1.0 #2 PREEMPT(full)\nHardware name: QEMU Ubuntu 24.04 PC v2 (i440FX + PIIX, arch_caps fix, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\nCall Trace:\n \u003cTASK\u003e\n __dump_stack lib/dump_stack.c:94 [inline]\n dump_stack_lvl+0x10e/0x1f0 lib/dump_stack.c:120\n print_address_description mm/kasan/report.c:378 [inline]\n print_report+0xf7/0x600 mm/kasan/report.c:482\n kasan_report+0xe4/0x120 mm/kasan/report.c:595\n free_rd_atomic_resource drivers/infiniband/sw/rxe/rxe_qp.c:180 [inline]\n free_rd_atomic_resources drivers/infiniband/sw/rxe/rxe_qp.c:171 [inline]\n free_rd_atomic_resources drivers/infiniband/sw/rxe/rxe_qp.c:163 [inline]\n rxe_qp_from_attr+0x1e88/0x2150 drivers/infiniband/sw/rxe/rxe_qp.c:712\n rxe_modify_qp+0x1e2/0x530 drivers/infiniband/sw/rxe/rxe_verbs.c:623\n ib_security_modify_qp+0x223/0xfa0 drivers/infiniband/core/security.c:625\n _ib_modify_qp+0x333/0xec0 drivers/infiniband/core/verbs.c:1915\n modify_qp+0x13ca/0x1940 drivers/infiniband/core/uverbs_cmd.c:1932\n ib_uverbs_modify_qp+0xcb/0x120 drivers/infiniband/core/uverbs_cmd.c:1958\n ib_uverbs_write+0xb86/0x1030 drivers/infiniband/core/uverbs_main.c:680\n vfs_write+0x2aa/0x1070 fs/read_write.c:686\n ksys_write+0x1f8/0x250 fs/read_write.c:740\n do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n do_syscall_64+0x116/0x800 arch/x86/entry/syscall_64.c:94\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\nRIP: 0033:0x7fefc75a70cd\nCode: ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 \u003c48\u003e 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48\nRSP: 002b:00007fefc8495018 EFLAGS: 00000246 ORIG_RAX: 0000000000000001\nRAX: ffffffffffffffda RBX: 00007fefc7835fa0 RCX: 00007fefc75a70cd\nRDX: 0000000000000078 RSI: 0000200000000240 RDI: 0000000000000007\nRBP: 00007fefc764f10f R08: 0000000000000000 R09: 0000000000000000\nR10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000\nR13: 00007fefc7836038 R14: 00007fefc7835fa0 R15: 00007ffcf0586aa0\n \u003c/TASK\u003e\n\nAllocated by task 11063:\n kasan_save_stack+0x33/0x60 mm/kasan/common.c:57\n kasan_save_track+0x14/0x30 mm/kasan/common.c:78\n poison_kmalloc_redzone mm/kasan/common.c:398 [inline]\n __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:415\n kasan_kmalloc include/linux/kasan.h:263 [inline]\n __do_kmalloc_node mm/slub.c:5296 [inline]\n __kmalloc_noprof+0x32a/0x850 mm/slub.c:5308\n kmalloc_noprof include/linux/slab.h:954 [inline]\n kzalloc_noprof include/linux/slab.h:1188 [inline]\n alloc_rd_atomic_resources drivers/infiniband/sw/rxe/rxe_qp.c:155 [inline]\n rxe_qp_from_attr+0x3f8/0x2150 drivers/infiniband/sw/rxe/rxe_qp.c:714\n rxe_modify_qp+0x1e2/0x530 drivers/infiniband/sw/rxe/rxe_verbs.c:623\n ib_security_modify_qp+0x223/0xfa0 drivers/infiniband/core/security.c:625\n _ib_modify_qp+0x333/0xec0 drivers/infiniband/core/verbs.c:1915\n modify_qp+0x13ca/0x1940 drivers/infiniband/core/uverbs_cmd.c:1932\n ib_uverbs_modify_qp+0xcb/0x120 drivers/infiniband/core/uverbs_cmd.c:1958\n ib_uverbs_write+0xb86/0x1030 drivers/infiniband/core/uverbs_ma\n---truncated---"
          }
        ],
        "id": "CVE-2026-80863",
        "lastModified": "2026-09-04T16:18:15.560",
        "metrics": {},
        "published": "2026-09-04T16:18:15.560",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/142c8165b7974b40fa62c393653edb5c00b8b5fe"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/30b90b55201902b2b8edcdbe2315ccd4c7547002"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/4e5f753e8c280278c09f68fe728abf846e2bdfc1"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/9b7d66ea88ae9395e42766b94a5c717b158b940a"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/bc6e943794515d2a8417b02597a27bd377468d04"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/bdf5deccfbf9f556a08d1d2ef52e9e48f969e53e"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/d219e7a8eed3802970c3e4d243d79c70ef0a31bf"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/de329533792a373186d79dca1ca120f8fa0afd05"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/f5e6580a3a16a83c743ad5a7c16922854a0d8b71"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-09-08T21:12:23+00:00",
      "cve": "CVE-2026-80863",
      "id": "CVE-2026-80863",
      "initial_release_date": "2026-09-04T00:00:00+00:00",
      "product_status:known_affected": "169",
      "product_status:known_not_affected": "107",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: RDMA/rxe: Fix OOB in free_rd_atomic_resources()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80863.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-15T01:07:05Z",
      "cve": "CVE-2026-80863",
      "id": "CVE-2026-80863",
      "initial_release_date": "2026-09-07T16:19:33Z",
      "product_status:known_affected": "349",
      "product_status:known_not_affected": "4",
      "product_status:recommended": "4",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-80863",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-80863.json",
      "version": "4"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





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

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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.