CVE-2026-23269 (GCVE-0-2026-23269)

Vulnerability from cvelistv5 – Published: 2026-03-18 17:54 – Updated: 2026-03-23 12:53
VLAI?
Title
apparmor: validate DFA start states are in bounds in unpack_pdb
Summary
In the Linux kernel, the following vulnerability has been resolved: apparmor: validate DFA start states are in bounds in unpack_pdb Start states are read from untrusted data and used as indexes into the DFA state tables. The aa_dfa_next() function call in unpack_pdb() will access dfa->tables[YYTD_ID_BASE][start], and if the start state exceeds the number of states in the DFA, this results in an out-of-bound read. ================================================================== BUG: KASAN: slab-out-of-bounds in aa_dfa_next+0x2a1/0x360 Read of size 4 at addr ffff88811956fb90 by task su/1097 ... Reject policies with out-of-bounds start states during unpacking to prevent the issue.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: ad5ff3db53c68c2f12936bc74ea5dfe0af943592 , < 15c3eb8916e7db01cb246d04a1fe6f0fdc065b0c (git)
Affected: ad5ff3db53c68c2f12936bc74ea5dfe0af943592 , < 0baadb0eece2c4d939db10d3c323b4652ac79a58 (git)
Affected: ad5ff3db53c68c2f12936bc74ea5dfe0af943592 , < 3bb7db43e32190c973d4019037cedb7895920184 (git)
Affected: ad5ff3db53c68c2f12936bc74ea5dfe0af943592 , < 9063d7e2615f4a7ab321de6b520e23d370e58816 (git)
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    Linux Linux Affected: 3.4
Unaffected: 0 , < 3.4 (semver)
Unaffected: 6.12.77 , ≤ 6.12.* (semver)
Unaffected: 6.18.18 , ≤ 6.18.* (semver)
Unaffected: 6.19.8 , ≤ 6.19.* (semver)
Unaffected: 7.0-rc4 , ≤ * (original_commit_for_fix)
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          "product": "Linux",
          "programFiles": [
            "security/apparmor/policy_unpack.c"
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\napparmor: validate DFA start states are in bounds in unpack_pdb\n\nStart states are read from untrusted data and used as indexes into the\nDFA state tables. The aa_dfa_next() function call in unpack_pdb() will\naccess dfa-\u003etables[YYTD_ID_BASE][start], and if the start state exceeds\nthe number of states in the DFA, this results in an out-of-bound read.\n\n==================================================================\n BUG: KASAN: slab-out-of-bounds in aa_dfa_next+0x2a1/0x360\n Read of size 4 at addr ffff88811956fb90 by task su/1097\n ...\n\nReject policies with out-of-bounds start states during unpacking\nto prevent the issue."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-03-23T12:53:04.804Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        },
        {
          "url": "https://www.qualys.com/2026/03/10/crack-armor.txt"
        }
      ],
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23269",
    "datePublished": "2026-03-18T17:54:42.988Z",
    "dateReserved": "2026-01-13T15:37:45.991Z",
    "dateUpdated": "2026-03-23T12:53:04.804Z",
    "state": "PUBLISHED"
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    "nvd": "{\"cve\":{\"id\":\"CVE-2026-23269\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-03-18T18:16:25.907\",\"lastModified\":\"2026-03-23T14:16:32.520\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\napparmor: validate DFA start states are in bounds in unpack_pdb\\n\\nStart states are read from untrusted data and used as indexes into the\\nDFA state tables. The aa_dfa_next() function call in unpack_pdb() will\\naccess dfa-\u003etables[YYTD_ID_BASE][start], and if the start state exceeds\\nthe number of states in the DFA, this results in an out-of-bound read.\\n\\n==================================================================\\n BUG: KASAN: slab-out-of-bounds in aa_dfa_next+0x2a1/0x360\\n Read of size 4 at addr ffff88811956fb90 by task su/1097\\n ...\\n\\nReject policies with out-of-bounds start states during unpacking\\nto prevent the issue.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0baadb0eece2c4d939db10d3c323b4652ac79a58\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/15c3eb8916e7db01cb246d04a1fe6f0fdc065b0c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/3bb7db43e32190c973d4019037cedb7895920184\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9063d7e2615f4a7ab321de6b520e23d370e58816\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://www.qualys.com/2026/03/10/crack-armor.txt\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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  • 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.
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  • 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.



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