CVE-2026-97523mptcp: close race between scheduler and state change
- 7.5HighCVSS base score
- 0.73%Exploitation in 30 daysEPSS · top 45% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: mptcp: close race between scheduler and state change The mptcp scheduler may race with subflow sockets state change: data transmission on the selected socket may fail and a later release could try to use mss_now reset to 0 for a divide operation. Address the issue by explicitly checking for the critical scenario.
Timeline
ID reserved
By Linux
- 1 day later
· 1 day later
Published
- 24 days later
· 24 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVDNVD · Received | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.73% · top 45% of all CVEs (13 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Affected products
- affected fb9c73ef2ac2ec816efdc8b9267bc04e1369c20b – < d74b2e26b54a7dae1d87c1f19ae0d6db500e5e03
- affected c886d70286bf3ad411eb3d689328a67f7102c6ae – < 5883ae880f51edc4b1484e787473b865b6159ead
- affected c886d70286bf3ad411eb3d689328a67f7102c6ae – < 0a926b5df8efdfbac07e2fb7fafb21849a2ad9c0
- affected c886d70286bf3ad411eb3d689328a67f7102c6ae – < 8f11430d51ff8365bc51b670bc3002b65ae4c6b7
- affected c886d70286bf3ad411eb3d689328a67f7102c6ae – < a09c87abf10a0a7e203137c75b5381aa63d9b31d
- affected c886d70286bf3ad411eb3d689328a67f7102c6ae – < 4c856f3c151a2f3fa237caa651c44015916ca584
- affected c886d70286bf3ad411eb3d689328a67f7102c6ae – < 42064de57fb83231fcc89663a94885f228a1ee53
- affected 8caf5c15b5288d52d9c89374d6c10fa32ee84ec5
- affected 5.15.190 – < 5.15.222
- affected 5.19.4 – < 5.20
- affected 6.0
- unaffected < 6.0
- unaffected 5.15.222 – ≤ 5.15.*
- unaffected 6.1.189 – ≤ 6.1.*
- unaffected 6.6.158 – ≤ 6.6.*
- unaffected 6.12.111 – ≤ 6.12.*
- unaffected 6.18.53 – ≤ 6.18.*
- unaffected 7.2.7 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References7
- https://git.kernel.org/stable/c/d74b2e26b54a7dae1d87c1f19ae0d6db500e5e03 (opens in a new tab)
- https://git.kernel.org/stable/c/5883ae880f51edc4b1484e787473b865b6159ead (opens in a new tab)
- https://git.kernel.org/stable/c/0a926b5df8efdfbac07e2fb7fafb21849a2ad9c0 (opens in a new tab)
- https://git.kernel.org/stable/c/8f11430d51ff8365bc51b670bc3002b65ae4c6b7 (opens in a new tab)
- https://git.kernel.org/stable/c/a09c87abf10a0a7e203137c75b5381aa63d9b31d (opens in a new tab)
- https://git.kernel.org/stable/c/4c856f3c151a2f3fa237caa651c44015916ca584 (opens in a new tab)
- https://git.kernel.org/stable/c/42064de57fb83231fcc89663a94885f228a1ee53 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-86831 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-97523)Record last updated .