xfrm: fix xfrm_state_construct() auth-trunc leak (Linux Linux)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.19 % · percentile 9 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Received
Description
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.
References
- https://git.kernel.org/stable/c/958ae9f261319e1cdc44879886bcda2263258cca
- https://git.kernel.org/stable/c/fb7f3e74789a3c89647f4eb768f6dfaf4a751e72
- https://git.kernel.org/stable/c/ba0c110c205855b3f1e3130d8c0fdb484d704c8c
- https://git.kernel.org/stable/c/c8837bbe792257af547fd1c0252553ce13148795
- https://git.kernel.org/stable/c/71d42da01740ec6557837bebec0bc48cfc3b4c39
- https://git.kernel.org/stable/c/cf67361e78dca488d6e4df8396a53e6745a3a80e
- https://git.kernel.org/stable/c/37426395cb90ef217beec8407a14bd82153793d3
- https://git.kernel.org/stable/c/be19d20e53a239572bb2a28efcc1cd2b069b1ef9
- https://git.kernel.org/stable/c/c12cbf56320fb633484ee0ca1fb7d68d6b64b213
European references
- ENISA EUVD · EUVD-2026-71293
- GCVE · GCVE-0-2026-80843
CERT-FR advisories
- CERTFR-2026-AVI-1385 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1289 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1253 — Multiples vulnérabilités dans le noyau Linux de Debian · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1163 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected 4447bb33f09444920a8f1d89e1540137429351b6 < 958ae9f261319e1cdc44879886bcda2263258cca ; affected 4447bb33f09444920a8f1d89e1540137429351b6 < fb7f3e74789a3c89647f4eb768f6dfaf4a751e72 ; affected 4447bb33f09444920a8f1d89e1540137429351b6 < ba0c110c205855b3f1e3130d8c0fdb484d704c8c ; affected 4447bb33f09444920a8f1d89e1540137429351b6 < c8837bbe792257af547fd1c0252553ce13148795 ; affected 4447bb33f09444920a8f1d89e1540137429351b6 < 71d42da01740ec6557837bebec0bc48cfc3b4c39 ; affected 4447bb33f09444920a8f1d89e1540137429351b6 < cf67361e78dca488d6e4df8396a53e6745a3a80e |
| Linux · Linux | affected 2.6.33 ; unaffected 0 < 2.6.33 ; unaffected 5.10.269 ≤ 5.10.* ; unaffected 5.15.220 ≤ 5.15.* ; unaffected 6.1.187 ≤ 6.1.* ; unaffected 6.6.156 ≤ 6.6.* |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |