CVE-2026-97524mptcp: avoid unneeded actions on subflow reset
- 7.5HighCVSS base score
- 0.74%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: avoid unneeded actions on subflow reset Once in a blue moon, the mptcp receive path can recursively call mptcp_data_ready() via state change under unlucky error conditions, and then try to hold the data lock again. Break the recursion loop explicitly checking for the exceptional condition. Add a new flag instead of using an existing one like 'closing', to exit early in subflow_state_change(), and explicitly flush the RX queue at reset time. This avoids unneeded processing to check for available data -- calling get_mapping_status() and more on a dying subflow -- but also in error reporting and worker scheduling. Note that we must consume the currently peeked skb before invoking mptcp_dss_corruption to avoid consuming it again after the eventual reset has freed it.
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)
- 0.74% · top 45% of all CVEs (15 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 fde99e972b8f88cebe619241d7aa43d288ef666a – < 6d669c740933124eae3df8cfc15995af9bcc6aba
- affected 12c1676d598e3b8dd92a033b623b792cc2ea1ec5 – < 83a7dcdd2b1060484528da70a643125174d47e5a
- affected 35668f8ec84f6c944676e48ecc6bbc5fc8e6fe25 – < a370e56024df0b07e3120c45a9773ae123819fd6
- affected b8be15d1ae7ea4eedd547c3b3141f592fbddcd30 – < 1962841387087970d75ba8b8d4c2aa2d45705e50
- affected e32d262c89e2b22cb0640223f953b548617ed8a6 – < 4b7abdcb5ba832fafab679f0d998af39cbc99307
- affected e32d262c89e2b22cb0640223f953b548617ed8a6 – < b2dbcc1ed48b5ac070a41db4a52aade6823c4df0
- affected e32d262c89e2b22cb0640223f953b548617ed8a6 – < ce7e4ede01ed3e47a48c0f1ce1d87bf4864bee9f
- affected e32d262c89e2b22cb0640223f953b548617ed8a6 – < 2b0f561f21b27c40c91ea4975268a06092bd7e9c
- affected 8bfd391bde685df7289b928ce8876a3583be4bfb
- affected 5.10.228 – < 5.10.271
- affected 5.15.169 – < 5.15.222
- affected 6.1.113 – < 6.1.189
- affected 6.6.57 – < 6.6.158
- affected 6.11.4 – < 6.12
- affected 6.12
- unaffected < 6.12
- unaffected 5.10.271 – ≤ 5.10.*
- 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
References8
- https://git.kernel.org/stable/c/6d669c740933124eae3df8cfc15995af9bcc6aba (opens in a new tab)
- https://git.kernel.org/stable/c/83a7dcdd2b1060484528da70a643125174d47e5a (opens in a new tab)
- https://git.kernel.org/stable/c/a370e56024df0b07e3120c45a9773ae123819fd6 (opens in a new tab)
- https://git.kernel.org/stable/c/1962841387087970d75ba8b8d4c2aa2d45705e50 (opens in a new tab)
- https://git.kernel.org/stable/c/4b7abdcb5ba832fafab679f0d998af39cbc99307 (opens in a new tab)
- https://git.kernel.org/stable/c/b2dbcc1ed48b5ac070a41db4a52aade6823c4df0 (opens in a new tab)
- https://git.kernel.org/stable/c/ce7e4ede01ed3e47a48c0f1ce1d87bf4864bee9f (opens in a new tab)
- https://git.kernel.org/stable/c/2b0f561f21b27c40c91ea4975268a06092bd7e9c (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-2026-86832 (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-2026-97524)Record last updated .