7.8

CVE-2026-80928: linux

CVSS: 7.8v3.1HighReceived
AliasesUBUNTU-CVE-2026-80928DEBIAN-CVE-2026-80928
Published 11-09-2026Last modified 19-10-2026
Open JSON

Vulnerability summary

CVE-2026-80928 is a high (CVSS 7.8) vulnerability in linux. EPSS estimates a 0.13% chance of exploitation in the next 30 days, higher than 2.3% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.13%
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 1 · Related 1
OPENSUSE-SU-2026:11805-1

Timeline

  1. 11-09-2026
    PublishedVulnerability first disclosed.
  2. 19-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: smack: fix cred UAF in smack_file_send_sigiotask() When inspecting the credentials of another task, objective credentials (->real_cred, accessed with __task_cred()) must always be used. Accessing ->cred on a non-current task is forbidden unless that task is being created or destroyed; a task is allowed to change its own ->cred pointer with no synchronization, and changing ->cred should only affect the current syscall. smack_file_send_sigiotask() was accessing both sets of credentials: First tsk->cred, then __task_cred(tsk). Fix it, always access the objective credentials here. I have tested that this bug can lead to a KASAN-reported UAF of struct cred in smack_file_send_sigiotask(), and that this fix prevents the race.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.13%

Chance of exploitation in the next 30 days

Percentile

2%

Versus all other CVEs

30-day change

0.00 pp

From 0.13% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.13%

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
  • linuxAll versions (No fix recorded) | < 6.1.190-1 | < 6.12.111-1 | < 7.2.6-1
  • linux-6.12< 6.12.111-1~deb12u1
Linux1 product
  • linux≥ 3b11a1decef07c19443d24ae926982bc8ec9f4c0, < a512366d84e134a9eefc2cc40eeb6e80e2ec162c | ≥ 3b11a1decef07c19443d24ae926982bc8ec9f4c0, < 7c7fe043f3099d0d35002b248967f75e55345b93 | ≥ 3b11a1decef07c19443d24ae926982bc8ec9f4c0, < f9c7b1f2b9d8f4176d2632743f51400855978ace | ≥ 3b11a1decef07c19443d24ae926982bc8ec9f4c0, < b5bcf3adfa27279da4401ab8f1e1a706601a92be | ≥ 3b11a1decef07c19443d24ae926982bc8ec9f4c0, < ed64aa505875a3b4defd504ee8e59e1949246a62 | ≥ 3b11a1decef07c19443d24ae926982bc8ec9f4c0, < b791401bf389a1546a830d2b381ca60fe94c7870 | ≥ 3b11a1decef07c19443d24ae926982bc8ec9f4c0, < fedc88e38ce979a720cd2de042578cb5df3dc8de | 2.6.29

3 vendors · 172 products

References

11 links
Show all 11 references