CVE-2025-39859ptp: ocp: fix use-after-free bugs causing by ptp_ocp_watchdog
- 7.8HighCVSS base score
- 0.20%Exploitation in 30 daysEPSS · top 91% 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: ptp: ocp: fix use-after-free bugs causing by ptp_ocp_watchdog The ptp_ocp_detach() only shuts down the watchdog timer if it is pending. However, if the timer handler is already running, the timer_delete_sync() is not called. This leads to race conditions where the devlink that contains the ptp_ocp is deallocated while the timer handler is still accessing it, resulting in use-after-free bugs. The following details one of the race scenarios. (thread 1) | (thread 2) ptp_ocp_remove() | ptp_ocp_detach() | ptp_ocp_watchdog() if (timer_pending(&bp->watchdog))| bp = timer_container_of() timer_delete_sync() | | devlink_free(devlink) //free | | bp-> //use Resolve this by unconditionally calling timer_delete_sync() to ensure the timer is reliably deactivated, preventing any access after free.
Timeline
ID reserved
By Linux
- 5 months later
· 5 months later
Published
- 14 months later
· 14 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 |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 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)
- 0.20% · top 91% of all CVEs (13 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 773bda96492153e11d21eb63ac814669b51fc701 – < a59822a762039b6e0252f21b091245d6ad7f324b
- affected 773bda96492153e11d21eb63ac814669b51fc701 – < e2a6eabe5304a789b7d40ce2576cd80154255e51
- affected 773bda96492153e11d21eb63ac814669b51fc701 – < aad70bdfc8244616e48c434310cab241a3f17781
- affected 773bda96492153e11d21eb63ac814669b51fc701 – < f10d3c7267ac7387a5129d5506c3c5f2460cfd9b
- affected 773bda96492153e11d21eb63ac814669b51fc701 – < 8bf935cf789872350b04c1a6468b0a509f67afb2
- affected 5.15
- unaffected < 5.15
- unaffected 6.1.191 – ≤ 6.1.*
- unaffected 6.6.160 – ≤ 6.6.*
- unaffected 6.12.114 – ≤ 6.12.*
- unaffected 6.16.6 – ≤ 6.16.*
- unaffected 6.17 – ≤ *
References
References5
- https://git.kernel.org/stable/c/a59822a762039b6e0252f21b091245d6ad7f324b (opens in a new tab)
- https://git.kernel.org/stable/c/e2a6eabe5304a789b7d40ce2576cd80154255e51 (opens in a new tab)
- https://git.kernel.org/stable/c/aad70bdfc8244616e48c434310cab241a3f17781 (opens in a new tab)
- https://git.kernel.org/stable/c/f10d3c7267ac7387a5129d5506c3c5f2460cfd9b (opens in a new tab)
- https://git.kernel.org/stable/c/8bf935cf789872350b04c1a6468b0a509f67afb2 (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-2025-30341 (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-2025-39859)Record last updated .