{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "security/apparmor/file.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "2791dd42d41e38805572b12116f721c97c4fcc0c",
              "status": "affected",
              "version": "b2a8011ae8749215f3939881239b454728a2d88b",
              "versionType": "git"
            },
            {
              "lessThan": "a5c79d44ef19203bd7cf6f3de8ff088112ebff95",
              "status": "affected",
              "version": "4a134723f9f1ad2f3621566259db673350d19cb1",
              "versionType": "git"
            },
            {
              "lessThan": "bcd1b34c21748531a3febaf7440632b89d8deab7",
              "status": "affected",
              "version": "4a134723f9f1ad2f3621566259db673350d19cb1",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "d276f52ecaf854e41549311e93802afea0abab5b",
              "versionType": "git"
            },
            {
              "lessThan": "6.18.40",
              "status": "affected",
              "version": "6.18.14",
              "versionType": "semver"
            },
            {
              "lessThan": "6.20",
              "status": "affected",
              "version": "6.19.4",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "security/apparmor/file.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "7.0"
            },
            {
              "lessThan": "7.0",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.40",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.40",
                  "versionStartIncluding": "6.18.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.5",
                  "versionStartIncluding": "7.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "7.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "6.19.4",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\napparmor: fix uninitialised pointer passed to audit_log_untrustedstring()\n\nCommit 4a134723f9f1 (\"apparmor: move check for aa_null file to cover all cases\")\nintrdouced a small bug, where path_name() may pass a potentially uninitialized\n*name to aa_audit_file() if the path-\u003edentry had been replaced with\naa_null.dentry earlier on. This can lead to page fault like one observed on\n7.0.2 openSUSE Tumbleweed kernel:\n\n[51692.242756] [  T24690] BUG: unable to handle page fault for address: 0000000f00000003\n[51692.242762] [  T24690] #PF: supervisor read access in kernel mode\n[51692.242763] [  T24690] #PF: error_code(0x0000) - not-present page\n[51692.242765] [  T24690] PGD 0 P4D 0\n[51692.242768] [  T24690] Oops: Oops: 0000 [#1] SMP NOPTI\n[51692.242772] [  T24690] CPU: 3 UID: 1020 PID: 24690 Comm: snap-confine Tainted: G           O        7.0.2-1-default #1 PREEMPT(full) openSUSE Tumbleweed  ab90b4c9940707f9cafa19bdad80b2cec52dbe51\n[51692.242775] [  T24690] Tainted: [O]=OOT_MODULE\n[51692.242777] [  T24690] Hardware name: Framework Laptop 13 (AMD Ryzen 7040Series)/FRANMDCP05, BIOS 03.18 01/08/2026\n[51692.242778] [  T24690] RIP: 0010:strlen+0x4/0x30\n[51692.242783] [  T24690] Code: f7 75 ec 31 c0 e9 17 9f 00 ff 48 89 f8 e9 0f 9f 00 ff 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa \u003c80\u003e 3f 00 74 18 48 89 f8 0f 1f 40 00 48 83 c0 01 80 38 00 75 f7 48\n[51692.242785] [  T24690] RSP: 0018:ffffd015eb1e3608 EFLAGS: 00010282\n[51692.242787] [  T24690] RAX: 0000000000000000 RBX: ffff89796198a360 RCX: 0000000000000000\n[51692.242788] [  T24690] RDX: 00000000000000d1 RSI: 0000000f00000003 RDI: 0000000f00000003\n[51692.242790] [  T24690] RBP: ffffffffb7ede090 R08: 00000000000005f5 R09: 0000000000000000\n[51692.242791] [  T24690] R10: 0000000000000000 R11: 0000000000000000 R12: ffffd015eb1e3700\n[51692.242792] [  T24690] R13: ffff8977a22bc380 R14: ffffffffb7ec5190 R15: ffff8977a0c8aa80\n[51692.242794] [  T24690] FS:  0000000000000000(0000) GS:ffff897f640d8000(0000) knlGS:0000000000000000\n[51692.242796] [  T24690] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[51692.242797] [  T24690] CR2: 0000000f00000003 CR3: 00000006ad15f000 CR4: 0000000000f50ef0\n[51692.242799] [  T24690] PKRU: 55555554\n[51692.242800] [  T24690] Call Trace:\n[51692.242802] [  T24690]  \u003cTASK\u003e\n[51692.242804] [  T24690]  audit_log_untrustedstring+0x1d/0x40\n[51692.242811] [  T24690]  common_lsm_audit+0x71/0x1d0\n[51692.242816] [  T24690]  aa_audit+0x5a/0x170\n[51692.242819] [  T24690]  aa_audit_file+0x18a/0x1b0\n[51692.242825] [  T24690]  path_name+0xd2/0x100\n[51692.242829] [  T24690]  profile_path_perm.part.0+0x58/0xb0\n[51692.242832] [  T24690]  aa_path_perm+0xef/0x150\n[51692.242837] [  T24690]  apparmor_file_open+0x153/0x2e0\n[51692.242840] [  T24690]  security_file_open+0x46/0xd0\n[51692.242844] [  T24690]  do_dentry_open+0xe9/0x4d0\n[51692.242848] [  T24690]  vfs_open+0x30/0x100\n\nWhile here, initialise variables which are passed down to path_name()."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.1,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - Exploitation requires local syscalls that invoke AppArmor LSM file/path hooks (e.g. open on an inherited fd replaced with aa_null.dentry during exec); there is no network, adjacent-wireless, or physical-device entry point to this audit code path.\nAC:L - An unprivileged attacker can reliably trigger the bug by execing into a confined AppArmor profile with disallowed inherited fds (aa_inherit_files replaces them with aa_null) and then opening or linking those paths; this was reproduced in production by snap-confine without rare timing or layout dependencies.\nPR:L - The observed crash was from snap-confine running as UID 1020 under AppArmor confinement; triggering the aa_null inheritance-and-reopen sequence requires only a normal unprivileged local account on an AppArmor-enabled system, not real init-namespace root or special capabilities.\nUI:N - No victim interaction is required beyond the attacker performing their own exec and subsequent file operations to hit the vulnerable audit path on aa_null-replaced file descriptors.\nS:U - Impact is a kernel oops/panic from the LSM audit path within the same kernel security domain; it is not a cross-boundary escape such as KVM guest-to-host or IOMMU bypass.\nC:H - The uninitialized name pointer is passed to audit_log_untrustedstring(), which calls strlen() and performs an uncontrolled kernel memory read; if the stack value were valid, leaked bytes could be written to the audit log, and even the faulting read is an out-of-bounds-style disclosure primitive.\nI:N - The flaw is an uninitialized-pointer read in strlen during audit formatting; it does not corrupt or modify kernel or user data, and observed impact is a crash rather than an arbitrary write or code-execution primitive.\nA:H - Triggering the uninitialized pointer in audit_log_untrustedstring() causes a supervisor page fault and kernel oops, as demonstrated on openSUSE Tumbleweed 7.0.2, denying service to the local system and potentially all users on the host."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T05:44:24.111Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/2791dd42d41e38805572b12116f721c97c4fcc0c"
        },
        {
          "url": "https://git.kernel.org/stable/c/a5c79d44ef19203bd7cf6f3de8ff088112ebff95"
        },
        {
          "url": "https://git.kernel.org/stable/c/bcd1b34c21748531a3febaf7440632b89d8deab7"
        }
      ],
      "title": "apparmor: fix uninitialised pointer passed to audit_log_untrustedstring()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-72455",
    "datePublished": "2026-08-15T05:57:02.234Z",
    "dateReserved": "2026-08-09T03:40:39.932Z",
    "dateUpdated": "2026-08-17T05:44:24.111Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}