CVE-2025-38481comedi: Fail COMEDI_INSNLIST ioctl if n_insns is too large
- 5.5MediumCVSS base score
- 0.19%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: comedi: Fail COMEDI_INSNLIST ioctl if n_insns is too large The handling of the `COMEDI_INSNLIST` ioctl allocates a kernel buffer to hold the array of `struct comedi_insn`, getting the length from the `n_insns` member of the `struct comedi_insnlist` supplied by the user. The allocation will fail with a WARNING and a stack dump if it is too large. Avoid that by failing with an `-EINVAL` error if the supplied `n_insns` value is unreasonable. Define the limit on the `n_insns` value in the `MAX_INSNS` macro. Set this to the same value as `MAX_SAMPLES` (65536), which is the maximum allowed sum of the values of the member `n` in the array of `struct comedi_insn`, and sensible comedi instructions will have an `n` of at least 1.
Timeline
ID reserved
By Linux
- 3 months later
· 3 months later
Published
- 10 months later
· 10 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 |
|---|---|---|---|
| NVDNVD · Analyzed | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.19% · top 91% of all CVEs (12 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected ed9eccbe8970f6eedc1b978c157caf1251a896d4 – < 454d732dfd0aef7d7aa950c409215ca06d717e93
- affected ed9eccbe8970f6eedc1b978c157caf1251a896d4 – < c68257588e87f45530235701a42496b7e9e56adb
- affected ed9eccbe8970f6eedc1b978c157caf1251a896d4 – < 69dc06b9514522de532e997a21d035cd29b0db44
- affected ed9eccbe8970f6eedc1b978c157caf1251a896d4 – < d4c73ce13f5b5a0fe0319f1f352ff602f0ace8e3
- affected ed9eccbe8970f6eedc1b978c157caf1251a896d4 – < c9d3d9667443caafa804cd07940aeaef8e53aa90
- affected ed9eccbe8970f6eedc1b978c157caf1251a896d4 – < 992d600f284e719242a434166e86c1999649b71c
- affected ed9eccbe8970f6eedc1b978c157caf1251a896d4 – < e3b8322cc8081d142ee4c1a43e1d702bdba1ed76
- affected ed9eccbe8970f6eedc1b978c157caf1251a896d4 – < 08ae4b20f5e82101d77326ecab9089e110f224cc
- affected 2.6.29
- unaffected < 2.6.29
- unaffected 5.4.297 – ≤ 5.4.*
- unaffected 5.10.241 – ≤ 5.10.*
- unaffected 5.15.190 – ≤ 5.15.*
- unaffected 6.1.147 – ≤ 6.1.*
- unaffected 6.6.100 – ≤ 6.6.*
- unaffected 6.12.40 – ≤ 6.12.*
- unaffected 6.15.8 – ≤ 6.15.*
- unaffected 6.16 – ≤ *
References
References10
- https://git.kernel.org/stable/c/454d732dfd0aef7d7aa950c409215ca06d717e93 (opens in a new tab)
- https://git.kernel.org/stable/c/c68257588e87f45530235701a42496b7e9e56adb (opens in a new tab)
- https://git.kernel.org/stable/c/69dc06b9514522de532e997a21d035cd29b0db44 (opens in a new tab)
- https://git.kernel.org/stable/c/d4c73ce13f5b5a0fe0319f1f352ff602f0ace8e3 (opens in a new tab)
- https://git.kernel.org/stable/c/c9d3d9667443caafa804cd07940aeaef8e53aa90 (opens in a new tab)
- https://git.kernel.org/stable/c/992d600f284e719242a434166e86c1999649b71c (opens in a new tab)
- https://git.kernel.org/stable/c/e3b8322cc8081d142ee4c1a43e1d702bdba1ed76 (opens in a new tab)
- https://git.kernel.org/stable/c/08ae4b20f5e82101d77326ecab9089e110f224cc (opens in a new tab)
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html (opens in a new tab)
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.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-2025-22882 (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-2025-38481)Record last updated .