CVE-2026-23269 (GCVE-0-2026-23269)
Vulnerability from cvelistv5 – Published: 2026-03-18 17:54 – Updated: 2026-08-05 12:20
VLAI
EPSS
VEX
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
7.1 (High)
Assigner
References
9 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
ad5ff3db53c68c2f12936bc74ea5dfe0af943592 , < f43eea8ae0102ea198da211ef7f5ce83725ecf19
(git)
Affected: ad5ff3db53c68c2f12936bc74ea5dfe0af943592 , < 5487871b2b56c19d26936ed6fdc62652b30941df (git) Affected: ad5ff3db53c68c2f12936bc74ea5dfe0af943592 , < 5443c027ec16afa55b1b8a3e7a1ab2ea3c77767a (git) Affected: ad5ff3db53c68c2f12936bc74ea5dfe0af943592 , < 07cf6320f40ea2ccfad63728cff34ecb309d03da (git) Affected: ad5ff3db53c68c2f12936bc74ea5dfe0af943592 , < 15c3eb8916e7db01cb246d04a1fe6f0fdc065b0c (git) Affected: ad5ff3db53c68c2f12936bc74ea5dfe0af943592 , < 0baadb0eece2c4d939db10d3c323b4652ac79a58 (git) Affected: ad5ff3db53c68c2f12936bc74ea5dfe0af943592 , < 3bb7db43e32190c973d4019037cedb7895920184 (git) Affected: ad5ff3db53c68c2f12936bc74ea5dfe0af943592 , < 9063d7e2615f4a7ab321de6b520e23d370e58816 (git) |
guessed | |
| Linux | Linux |
Affected:
3.4
Unaffected: 0 , < 3.4 (semver) Unaffected: 5.10.253 , ≤ 5.10.* (semver) Unaffected: 5.15.203 , ≤ 5.15.* (semver) Unaffected: 6.1.169 , ≤ 6.1.* (semver) Unaffected: 6.6.130 , ≤ 6.6.* (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 , ≤ * (original_commit_for_fix) |
guessed |
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"value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\napparmor: validar que los estados iniciales de DFA est\u00e1n dentro de los l\u00edmites en unpack_pdb\n\nLos estados iniciales se leen de datos no confiables y se usan como \u00edndices en las tablas de estados de DFA. La llamada a la funci\u00f3n aa_dfa_next() en unpack_pdb() acceder\u00e1 a dfa-\u0026gt;tables[YYTD_ID_BASE][start], y si el estado inicial excede el n\u00famero de estados en el DFA, esto resulta en una lectura fuera de l\u00edmites.\n\n==================================================================\nERROR: KASAN: slab-out-of-bounds en aa_dfa_next+0x2a1/0x360\nLectura de tama\u00f1o 4 en la direcci\u00f3n ffff88811956fb90 por la tarea su/1097\n...\n\nRechazar pol\u00edticas con estados iniciales fuera de l\u00edmites durante el desempaquetado para prevenir el problema."
}
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"id": "CVE-2026-23269",
"lastModified": "2026-06-17T10:21:13.413",
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"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/07cf6320f40ea2ccfad63728cff34ecb309d03da"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/0baadb0eece2c4d939db10d3c323b4652ac79a58"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/15c3eb8916e7db01cb246d04a1fe6f0fdc065b0c"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/3bb7db43e32190c973d4019037cedb7895920184"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/5443c027ec16afa55b1b8a3e7a1ab2ea3c77767a"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/5487871b2b56c19d26936ed6fdc62652b30941df"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/9063d7e2615f4a7ab321de6b520e23d370e58816"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/f43eea8ae0102ea198da211ef7f5ce83725ecf19"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Third Party Advisory"
],
"url": "https://www.qualys.com/2026/03/10/crack-armor.txt"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Analyzed",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-125"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Important",
"current_release_date": "2026-08-20T13:42:26+00:00",
"cve": "CVE-2026-23269",
"id": "CVE-2026-23269",
"initial_release_date": "2026-03-18T00:00:00+00:00",
"product_status:known_not_affected": "274",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: Linux kernel: AppArmor out-of-bounds read via crafted policy",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-23269.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-09-11T01:37:33Z",
"cve": "CVE-2026-23269",
"id": "CVE-2026-23269",
"initial_release_date": "2026-03-19T00:26:43Z",
"product_status:first_fixed": "2",
"product_status:known_affected": "546",
"product_status:known_not_affected": "4",
"product_status:recommended": "576",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2026-23269",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-23269.json",
"version": "33"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
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.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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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.
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