CVE-2025-39873can: xilinx_can: xcan_write_frame(): fix use-after-free of transmitted SKB
- 7.8HighCVSS base score
- 0.16%Exploitation in 30 daysEPSS · top 95% 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: can: xilinx_can: xcan_write_frame(): fix use-after-free of transmitted SKB can_put_echo_skb() takes ownership of the SKB and it may be freed during or after the call. However, xilinx_can xcan_write_frame() keeps using SKB after the call. Fix that by only calling can_put_echo_skb() after the code is done touching the SKB. The tx_lock is held for the entire xcan_write_frame() execution and also on the can_get_echo_skb() side so the order of operations does not matter. An earlier fix commit 3d3c817c3a40 ("can: xilinx_can: Fix usage of skb memory") did not move the can_put_echo_skb() call far enough. [mkl: add "commit" in front of sha1 in patch description] [mkl: fix indention]
Timeline
ID reserved
By Linux
- 5 months later
· 5 months later
Published
- 11 months later
· 11 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)
- 0.16% · top 95% of all CVEs (15 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected 1598efe57b3e768056e4ca56cb9cf33111e68d1c – < e202ffd9e54538ef67ec301ebd6d9da4823466c9
- affected 1598efe57b3e768056e4ca56cb9cf33111e68d1c – < 1139321161a3ba5e45e61e0738b37f42f20bc57a
- affected 1598efe57b3e768056e4ca56cb9cf33111e68d1c – < 94b050726288a56a6b8ff55aa641f2fedbd3b44c
- affected 1598efe57b3e768056e4ca56cb9cf33111e68d1c – < 725b33deebd6e4c96fe7893f384510a54258f28f
- affected 1598efe57b3e768056e4ca56cb9cf33111e68d1c – < 668cc1e3bb21101d074e430de1b7ba8fd10189e7
- affected 1598efe57b3e768056e4ca56cb9cf33111e68d1c – < ef79f00be72bd81d2e1e6f060d83cf7e425deee4
- affected 4.19
- unaffected < 4.19
- unaffected 5.15.194 – ≤ 5.15.*
- unaffected 6.1.153 – ≤ 6.1.*
- unaffected 6.6.107 – ≤ 6.6.*
- unaffected 6.12.48 – ≤ 6.12.*
- unaffected 6.16.8 – ≤ 6.16.*
- unaffected 6.17 – ≤ *
References
References7
- https://git.kernel.org/stable/c/e202ffd9e54538ef67ec301ebd6d9da4823466c9 (opens in a new tab)
- https://git.kernel.org/stable/c/1139321161a3ba5e45e61e0738b37f42f20bc57a (opens in a new tab)
- https://git.kernel.org/stable/c/94b050726288a56a6b8ff55aa641f2fedbd3b44c (opens in a new tab)
- https://git.kernel.org/stable/c/725b33deebd6e4c96fe7893f384510a54258f28f (opens in a new tab)
- https://git.kernel.org/stable/c/668cc1e3bb21101d074e430de1b7ba8fd10189e7 (opens in a new tab)
- https://git.kernel.org/stable/c/ef79f00be72bd81d2e1e6f060d83cf7e425deee4 (opens in a new tab)
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html (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-2025-30865 (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-2025-39873)Record last updated .