CVE-2026-23403 (GCVE-0-2026-23403)
Vulnerability from cvelistv5 – Published: 2026-04-01 08:36 – Updated: 2026-04-01 08:36
VLAI?
Title
apparmor: fix memory leak in verify_header
Summary
In the Linux kernel, the following vulnerability has been resolved:
apparmor: fix memory leak in verify_header
The function sets `*ns = NULL` on every call, leaking the namespace
string allocated in previous iterations when multiple profiles are
unpacked. This also breaks namespace consistency checking since *ns
is always NULL when the comparison is made.
Remove the incorrect assignment.
The caller (aa_unpack) initializes *ns to NULL once before the loop,
which is sufficient.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Affected:
dd51c84857630e77c139afe4d9bba65fc051dc3f , < 663ce34786e759ebcbeb3060685c20bcc886d51a
(git)
Affected: dd51c84857630e77c139afe4d9bba65fc051dc3f , < 786e2c2a87d9c505f33321d1fd23a176aa8ddeb1 (git) Affected: dd51c84857630e77c139afe4d9bba65fc051dc3f , < 4f0889f2df1ab99224a5e1ac4e20437eea5fe38e (git) Affected: dd51c84857630e77c139afe4d9bba65fc051dc3f , < 42fd831abfc15d0643c14688f0522556b347e7e6 (git) Affected: dd51c84857630e77c139afe4d9bba65fc051dc3f , < e38c55d9f834e5b848bfed0f5c586aaf45acb825 (git) |
||
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"versions": [
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"version": "6.18.18",
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{
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"version": "6.19.8",
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{
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"status": "unaffected",
"version": "7.0-rc4",
"versionType": "original_commit_for_fix"
}
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}
],
"cpeApplicability": [
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}
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"negate": false,
"operator": "OR"
}
]
}
],
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\napparmor: fix memory leak in verify_header\n\nThe function sets `*ns = NULL` on every call, leaking the namespace\nstring allocated in previous iterations when multiple profiles are\nunpacked. This also breaks namespace consistency checking since *ns\nis always NULL when the comparison is made.\n\nRemove the incorrect assignment.\nThe caller (aa_unpack) initializes *ns to NULL once before the loop,\nwhich is sufficient."
}
],
"providerMetadata": {
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"url": "https://git.kernel.org/stable/c/786e2c2a87d9c505f33321d1fd23a176aa8ddeb1"
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"url": "https://git.kernel.org/stable/c/4f0889f2df1ab99224a5e1ac4e20437eea5fe38e"
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"url": "https://git.kernel.org/stable/c/42fd831abfc15d0643c14688f0522556b347e7e6"
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{
"url": "https://git.kernel.org/stable/c/e38c55d9f834e5b848bfed0f5c586aaf45acb825"
}
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"title": "apparmor: fix memory leak in verify_header",
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"cveId": "CVE-2026-23403",
"datePublished": "2026-04-01T08:36:34.269Z",
"dateReserved": "2026-01-13T15:37:46.012Z",
"dateUpdated": "2026-04-01T08:36:34.269Z",
"state": "PUBLISHED"
},
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}
}
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Sightings
| Author | Source | Type | Date |
|---|
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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