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CVE-2026-97522

Linux: mptcp: fix bad accounting in __mptcp_subflow_push_pending()

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)0.20%Chance of exploitation activity in the next 30 days, higher than 9% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in9781fa35d9f7a87a83115acd3a88bc9ce35b5407Fixed versionCVE List
Published25 Sep 2026Updated 19 Oct 2026CVE List

What fixes it

  • 9781fa35d9f7a87a83115acd3a88bc9ce35b5407LinuxCVE 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:

mptcp: fix bad accounting in __mptcp_subflow_push_pending()

If __subflow_push_pending() errors out we should avoid updating the copied byte counters, to avoid mismatch push call later on.

Text from CVE List

Affected versions 12

  • Linuxaffected: 0fa1b3783a17d75a4aa1651a18ede041ffca5750 before ddbf9f03c1cc7d5b86eebe7c2beea0db4286d354CVE List
  • Linuxaffected: 0fa1b3783a17d75a4aa1651a18ede041ffca5750 before 9781fa35d9f7a87a83115acd3a88bc9ce35b5407CVE List
  • Linuxaffected: 0fa1b3783a17d75a4aa1651a18ede041ffca5750 before a0a64525f3414268ed4b1945a1dc690aa974dd4fCVE List
  • Linuxaffected: 0fa1b3783a17d75a4aa1651a18ede041ffca5750 before dc054821e639a2e14f1419436612db70b6af45fcCVE List
  • Linuxaffected: 0fa1b3783a17d75a4aa1651a18ede041ffca5750 before f3ef03357396d4b147d8e76c75fb612c2f264ffcCVE List
  • Linuxaffected: 6.6CVE List
  • Linuxunaffected: all versions before 6.6CVE List
  • Linuxunaffected: 6.6.158 through 6.6.*CVE List
  • Linuxunaffected: 6.12.111 through 6.12.*CVE List
  • Linuxunaffected: 6.18.53 through 6.18.*CVE List
  • Linuxunaffected: 7.2.7 through 7.2.*CVE List
  • Linuxunaffected: 7.3CVE List

References 5