GHSA-7VV6-3XQC-JR7V
Vulnerability from github – Published: 2026-09-04 18:31 – Updated: 2026-09-04 18:31
VLAI
Details
In the Linux kernel, the following vulnerability has been resolved:
xfrm: fix xfrm_state_construct() auth-trunc leak
attach_auth_trunc() can allocate x->aalg while leaving x->props.aalgo at zero when the selected auth algorithm has no sadb_alg_id. One real case is cmac(aes).
xfrm_state_construct() then treats !x->props.aalgo as "no auth algorithm attached yet" and calls attach_auth(). That overwrites x->aalg and loses the first allocation. Any later failure or teardown only frees the replacement pointer.
Check whether x->aalg is already attached instead of inferring that state from x->props.aalgo.
{
"affected": [],
"aliases": [
"CVE-2026-80843"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-04T16:18:12Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: fix xfrm_state_construct() auth-trunc leak\n\nattach_auth_trunc() can allocate x-\u003eaalg while leaving\nx-\u003eprops.aalgo at zero when the selected auth algorithm has no\nsadb_alg_id. One real case is cmac(aes).\n\nxfrm_state_construct() then treats !x-\u003eprops.aalgo as \"no auth\nalgorithm attached yet\" and calls attach_auth(). That overwrites\nx-\u003eaalg and loses the first allocation. Any later failure or teardown\nonly frees the replacement pointer.\n\nCheck whether x-\u003eaalg is already attached instead of inferring that\nstate from x-\u003eprops.aalgo.",
"id": "GHSA-7vv6-3xqc-jr7v",
"modified": "2026-09-04T18:31:29Z",
"published": "2026-09-04T18:31:28Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80843"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/37426395cb90ef217beec8407a14bd82153793d3"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/71d42da01740ec6557837bebec0bc48cfc3b4c39"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/958ae9f261319e1cdc44879886bcda2263258cca"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/ba0c110c205855b3f1e3130d8c0fdb484d704c8c"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/be19d20e53a239572bb2a28efcc1cd2b069b1ef9"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c12cbf56320fb633484ee0ca1fb7d68d6b64b213"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c8837bbe792257af547fd1c0252553ce13148795"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/cf67361e78dca488d6e4df8396a53e6745a3a80e"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/fb7f3e74789a3c89647f4eb768f6dfaf4a751e72"
}
],
"schema_version": "1.4.0",
"severity": []
}
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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.
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- 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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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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