CVE-2026-93222: signal: avoid shared siginfo namespace rewrites

Received
AliasesUBUNTU-CVE-2026-93222DEBIAN-CVE-2026-93222
Published 24-09-2026Last modified 19-10-2026

Vulnerability summary

CVE-2026-93222 is a vulnerability in linux with no CVSS score yet. EPSS estimates a 0.18% chance of exploitation in the next 30 days, higher than 7.2% of scored vulnerabilities.

Priority
Insufficient evidence

No CVSS vector published; no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
Not scored
010
No CVSS score recorded
EPSS score
0.18%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 12 · Related 10
MGASA-2026-0506MGASA-2026-0542OPENSUSE-SU-2026:11893-1OPENSUSE-SU-2026:22167-1SUSE-SU-2026:24371-1SUSE-SU-2026:24379-1

Timeline

  1. 24-09-2026
    PublishedVulnerability first disclosed.
  2. 19-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: signal: avoid shared siginfo namespace rewrites send_signal_locked() rewrites sender ids for the target namespace. Group sends reuse the same siginfo, so one recipient can affect the next. Copy the siginfo before changing it.

CVSS metrics

Risk metrics not yet published.

EPSS trend

Probability

0.18%

Chance of exploitation in the next 30 days

Percentile

7%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.18% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Version check

Known conditions: not stated in public data.

Ubuntu165 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≥ 7a0cf094944e2540758b7f957eb6846d5126f535, < e015d1ac6b43a23c52c5163299414ae77d7d4ae0 | ≥ 7a0cf094944e2540758b7f957eb6846d5126f535, < 4ee7c4e4719a825052f42f02ec159b5b42b68fbc | ≥ 7a0cf094944e2540758b7f957eb6846d5126f535, < 148b0dae2a1755beb873a2aab51fb191414f068c | ≥ 7a0cf094944e2540758b7f957eb6846d5126f535, < 6b1de022304ef85284c5933a5fb8492f6f54efc9 | ≥ 7a0cf094944e2540758b7f957eb6846d5126f535, < 03c8761e75d1619906bb503686f9cc1dfc6a67f4 | ≥ 7a0cf094944e2540758b7f957eb6846d5126f535, < a246da20c8e4ae4319511c698b9f26ad0ad1769f | ≥ 7a0cf094944e2540758b7f957eb6846d5126f535, < b655c2040ce836afad5643842543567b31f8c11d | ≥ 7a0cf094944e2540758b7f957eb6846d5126f535, < d19cdc167e696714509e87d3f7ae765b6e164589 | e897dd22800f02bd48aefb1511fff0b2ce96e94c | 2f0e9eed11ca778d0ec5507a739c28472fd4ca20 | ≥ 5.1.20, < 5.2 | ≥ 5.2.3, < 5.3 | 5.3

3 vendors · 168 products

References

12 links
Show all 12 references