CVE-2026-80843: linux

CVSS: UnknownReceived
AliasesUBUNTU-CVE-2026-80843DEBIAN-CVE-2026-80843
Published 04-09-2026Last modified 19-10-2026
Open JSON

Vulnerability summary

CVE-2026-80843 is a vulnerability in linux with no CVSS score yet. EPSS estimates a 0.19% chance of exploitation in the next 30 days, higher than 8.7% of scored vulnerabilities.

Overall risk
0/100
0100
Minimal · default modelHow is this calculated?
CVSS score
Not scored
010
No CVSS score recorded
EPSS score
0.19%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 2 · Related 1
MGASA-2026-0506OPENSUSE-SU-2026:11773-1

Timeline

  1. 04-09-2026
    PublishedVulnerability first disclosed.
  2. 19-10-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

Risk metrics not yet published.

EPSS trend

Probability

0.19%

Chance of exploitation in the next 30 days

Percentile

9%

Versus all other CVEs

30-day change

0.00 pp

From 0.19% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.19%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Ubuntu169 products
  • linuxAll versions (No fix recorded)
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian2 products
  • linux< 6.1.187-1 | < 6.12.111-1 | < 7.1.13-1
  • linux-6.12< 6.12.111-1~deb12u1
Linux1 product
  • linux≥ 4447bb33f09444920a8f1d89e1540137429351b6, < 958ae9f261319e1cdc44879886bcda2263258cca | ≥ 4447bb33f09444920a8f1d89e1540137429351b6, < fb7f3e74789a3c89647f4eb768f6dfaf4a751e72 | ≥ 4447bb33f09444920a8f1d89e1540137429351b6, < ba0c110c205855b3f1e3130d8c0fdb484d704c8c | ≥ 4447bb33f09444920a8f1d89e1540137429351b6, < c8837bbe792257af547fd1c0252553ce13148795 | ≥ 4447bb33f09444920a8f1d89e1540137429351b6, < 71d42da01740ec6557837bebec0bc48cfc3b4c39 | ≥ 4447bb33f09444920a8f1d89e1540137429351b6, < cf67361e78dca488d6e4df8396a53e6745a3a80e | ≥ 4447bb33f09444920a8f1d89e1540137429351b6, < 37426395cb90ef217beec8407a14bd82153793d3 | ≥ 4447bb33f09444920a8f1d89e1540137429351b6, < be19d20e53a239572bb2a28efcc1cd2b069b1ef9 | ≥ 4447bb33f09444920a8f1d89e1540137429351b6, < c12cbf56320fb633484ee0ca1fb7d68d6b64b213 | 2.6.33

3 vendors · 172 products

References

14 links
Show all 14 references