CVE-2026-23239espintcp: Fix race condition in espintcp_close()
- 7.8HighCVSS base score
- 0.13%Exploitation in 30 daysEPSS · top 97% 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: espintcp: Fix race condition in espintcp_close() This issue was discovered during a code audit. After cancel_work_sync() is called from espintcp_close(), espintcp_tx_work() can still be scheduled from paths such as the Delayed ACK handler or ksoftirqd. As a result, the espintcp_tx_work() worker may dereference a freed espintcp ctx or sk. The following is a simple race scenario: cpu0 cpu1 espintcp_close() cancel_work_sync(&ctx->work); espintcp_write_space() schedule_work(&ctx->work); To prevent this race condition, cancel_work_sync() is replaced with disable_work_sync().
Timeline
ID reserved
By Linux
- 56 days later
· 56 days later
Published
- 7 months later
· 7 months 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 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.13% · top 97% of all CVEs (12 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 – < f7ad8b1d0e421c524604d5076b73232093490d5c
- affected e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 – < 664e9df53226b4505a0894817ecad2c610ab11d8
- affected e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 – < 022ff7f347588de6e17879a1da6019647b21321b
- affected e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 – < e1512c1db9e8794d8d130addd2615ec27231d994
- affected 5.6
- unaffected < 5.6
- unaffected 6.12.75 – ≤ 6.12.*
- unaffected 6.18.16 – ≤ 6.18.*
- unaffected 6.19.6 – ≤ 6.19.*
- unaffected 7.0 – ≤ *
References
References4
- https://git.kernel.org/stable/c/f7ad8b1d0e421c524604d5076b73232093490d5c (opens in a new tab)
- https://git.kernel.org/stable/c/664e9df53226b4505a0894817ecad2c610ab11d8 (opens in a new tab)
- https://git.kernel.org/stable/c/022ff7f347588de6e17879a1da6019647b21321b (opens in a new tab)
- https://git.kernel.org/stable/c/e1512c1db9e8794d8d130addd2615ec27231d994 (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-2026-10573 (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-2026-23239)Record last updated .