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CVE-2026-93222

Linux: signal: avoid shared siginfo namespace rewrites

Linux LinuxOperating systems
Open in ThreatlineRecord JSON
CVSS
NoneNot scored
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.18%Chance of exploitation activity in the next 30 days, higher than 6% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in4ee7c4e4719a825052f42f02ec159b5b42b68fbcAlso 148b0dae2a1755beb873a2aab51fb191414f068c, 6b1de022304ef85284c5933a5fb8492f6f54efc9 and 3 moreCVE List
Published24 Sep 2026Updated 19 Oct 2026CVE List

What fixes it

  • 4ee7c4e4719a825052f42f02ec159b5b42b68fbcLinuxCVE List
  • 148b0dae2a1755beb873a2aab51fb191414f068cLinuxCVE List
  • 6b1de022304ef85284c5933a5fb8492f6f54efc9LinuxCVE List
  • 03c8761e75d1619906bb503686f9cc1dfc6a67f4LinuxCVE List
  • 5.2LinuxCVE List
  • 5.3LinuxCVE List

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

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.

Text from CVE List

Affected versions 22

  • Linuxaffected: 7a0cf094944e2540758b7f957eb6846d5126f535 before e015d1ac6b43a23c52c5163299414ae77d7d4ae0CVE List
  • Linuxaffected: 7a0cf094944e2540758b7f957eb6846d5126f535 before 4ee7c4e4719a825052f42f02ec159b5b42b68fbcCVE List
  • Linuxaffected: 7a0cf094944e2540758b7f957eb6846d5126f535 before 148b0dae2a1755beb873a2aab51fb191414f068cCVE List
  • Linuxaffected: 7a0cf094944e2540758b7f957eb6846d5126f535 before 6b1de022304ef85284c5933a5fb8492f6f54efc9CVE List
  • Linuxaffected: 7a0cf094944e2540758b7f957eb6846d5126f535 before 03c8761e75d1619906bb503686f9cc1dfc6a67f4CVE List
  • Linuxaffected: 7a0cf094944e2540758b7f957eb6846d5126f535 before a246da20c8e4ae4319511c698b9f26ad0ad1769fCVE List
  • Linuxaffected: 7a0cf094944e2540758b7f957eb6846d5126f535 before b655c2040ce836afad5643842543567b31f8c11dCVE List
  • Linuxaffected: 7a0cf094944e2540758b7f957eb6846d5126f535 before d19cdc167e696714509e87d3f7ae765b6e164589CVE List
  • Linuxaffected: e897dd22800f02bd48aefb1511fff0b2ce96e94cCVE List
  • Linuxaffected: 2f0e9eed11ca778d0ec5507a739c28472fd4ca20CVE List
  • Linuxaffected: 5.1.20 before 5.2CVE List
  • Linuxaffected: 5.2.3 before 5.3CVE List
  • Linuxaffected: 5.3CVE List
  • Linuxunaffected: all versions before 5.3CVE List
  • Linuxunaffected: 5.10.270 through 5.10.*CVE List
  • Linuxunaffected: 5.15.221 through 5.15.*CVE List
  • Linuxunaffected: 6.1.188 through 6.1.*CVE List
  • Linuxunaffected: 6.6.157 through 6.6.*CVE List
  • Linuxunaffected: 6.12.109 through 6.12.*CVE List
  • Linuxunaffected: 6.18.50 through 6.18.*CVE List
  • Linuxunaffected: 7.2.4 through 7.2.*CVE List
  • Linuxunaffected: 7.3CVE List

References 8