CVE-2025-37787net: dsa: mv88e6xxx: avoid unregistering devlink regions which were never registered
- 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: net: dsa: mv88e6xxx: avoid unregistering devlink regions which were never registered Russell King reports that a system with mv88e6xxx dereferences a NULL pointer when unbinding this driver: https://lore.kernel.org/netdev/[email protected]/ The crash seems to be in devlink_region_destroy(), which is not NULL tolerant but is given a NULL devlink global region pointer. At least on some chips, some devlink regions are conditionally registered since the blamed commit, see mv88e6xxx_setup_devlink_regions_global(): if (cond && !cond(chip)) continue; These are MV88E6XXX_REGION_STU and MV88E6XXX_REGION_PVT. If the chip does not have an STU or PVT, it should crash like this. To fix the issue, avoid unregistering those regions which are NULL, i.e. were skipped at mv88e6xxx_setup_devlink_regions_global() time.
Timeline
ID reserved
By Linux
- 15 days later
· 15 days later
Published
- 13 months later
· 13 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 · Modified | 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 (15 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 836021a2d0e0e4c90b895a35bd9c0342071855fb – < 8ccdf5e24b276848eefb2755e05ff0f005a0c4a1
- affected 836021a2d0e0e4c90b895a35bd9c0342071855fb – < b3c70dfe51f10df60db2646c08cebd24bcdc5247
- affected 836021a2d0e0e4c90b895a35bd9c0342071855fb – < bbb80f004f7a90c3dcaacc982c59967457254a05
- affected 836021a2d0e0e4c90b895a35bd9c0342071855fb – < 3665695e3572239dc233216f06b41f40cc771889
- affected 836021a2d0e0e4c90b895a35bd9c0342071855fb – < 5f5e95945bb1e08be7655da6acba648274db457d
- affected 836021a2d0e0e4c90b895a35bd9c0342071855fb – < c84f6ce918a9e6f4996597cbc62536bbf2247c96
- affected 5.13
- unaffected < 5.13
- unaffected 5.15.181 – ≤ 5.15.*
- unaffected 6.1.135 – ≤ 6.1.*
- unaffected 6.6.88 – ≤ 6.6.*
- unaffected 6.12.25 – ≤ 6.12.*
- unaffected 6.14.4 – ≤ 6.14.*
- unaffected 6.15 – ≤ *
References
References7
- https://git.kernel.org/stable/c/8ccdf5e24b276848eefb2755e05ff0f005a0c4a1 (opens in a new tab)
- https://git.kernel.org/stable/c/b3c70dfe51f10df60db2646c08cebd24bcdc5247 (opens in a new tab)
- https://git.kernel.org/stable/c/bbb80f004f7a90c3dcaacc982c59967457254a05 (opens in a new tab)
- https://git.kernel.org/stable/c/3665695e3572239dc233216f06b41f40cc771889 (opens in a new tab)
- https://git.kernel.org/stable/c/5f5e95945bb1e08be7655da6acba648274db457d (opens in a new tab)
- https://git.kernel.org/stable/c/c84f6ce918a9e6f4996597cbc62536bbf2247c96 (opens in a new tab)
- https://lists.debian.org/debian-lts-announce/2025/05/msg00045.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-2025-13013 (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-2025-37787)Record last updated .