CVE-2026-80843
CVE CVE-2026-80843EUVD EUVD-2026-71293Published 2026-09-04T15:54:53.000Z
What the advisory describes
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.
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Linux — Linux 4447bb33f09444920a8f1d89e1540137429351b6 <cf67361e78dca488d6e4df8396a53e6745a3a80e; 4447bb33f09444920a8f1d89e1540137429351b6 <37426395cb90ef217beec8407a14bd82153793d3; patch: 5.15.220; patch: 7.3-rc1; patch: 7.1.13; patch: 7.2.3; 4447bb33f09444920a8f1d89e1540137429351b6 <71d42da01740ec6557837bebec0bc48cfc3b4c39; patch: 6.18.49; patch: 0; patch: 5.10.269; 2.6.33; 4447bb33f09444920a8f1d89e1540137429351b6 <ba0c110c205855b3f1e3130d8c0fdb484d704c8c; 4447bb33f09444920a8f1d89e1540137429351b6 <c8837bbe792257af547fd1c0252553ce13148795; 4447bb33f09444920a8f1d89e1540137429351b6 <be19d20e53a239572bb2a28efcc1cd2b069b1ef9; 4447bb33f09444920a8f1d89e1540137429351b6 <c12cbf56320fb633484ee0ca1fb7d68d6b64b213; 4447bb33f09444920a8f1d89e1540137429351b6 <fb7f3e74789a3c89647f4eb768f6dfaf4a751e72; patch: 6.1.187; patch: 6.12.108; 4447bb33f09444920a8f1d89e1540137429351b6 <958ae9f261319e1cdc44879886bcda2263258cca; patch: 6.6.156
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Linux — Linux
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