CVE-2026-90291module/dups: Fix use-after-free in kmod_dup_req lifetime handling
- 7.8HighCVSS base score
- 0.17%Exploitation in 30 daysEPSS · top 94% 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: module/dups: Fix use-after-free in kmod_dup_req lifetime handling The kmod dups code uses RCU to ensure that a kmod_dup_req instance is freed only after it is no longer referenced. When releasing an instance, the kmod_dup_request_delete() function removes the kmod_dup_req from the dup_kmod_reqs list, waits via synchronize_rcu() and finally frees it. However, this doesn't work correctly because parallel users referencing the instance in kmod_dup_request_exists_wait() don't enter an RCU read-side critical section. This can result in a use-after-free. The kmod_dup_request_exists_wait() function may need to hold a valid reference to a kmod_dup_req instance across a blocking wait until the corresponding modprobe command completes. This makes it unsuitable for RCU. Fix the issue by changing the lifecycle management of kmod_dup_req to use reference counting.
Timeline
ID reserved
By Linux
- 6 days later
· 6 days later
Published
- 34 days later
· 34 days 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 · Received | 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)
- 0.17% · top 94% of all CVEs (13 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 8660484ed1cf3261e89e0bad94c6395597e87599 – < a3205bd1f218053575589b14caf8df667f344134
- affected 8660484ed1cf3261e89e0bad94c6395597e87599 – < 2c85e0fb528e039aa8ea1e9c2a1f64347f990541
- affected 8660484ed1cf3261e89e0bad94c6395597e87599 – < b2709aad7599f6fd957939b60f4a8323c8f08072
- affected 8660484ed1cf3261e89e0bad94c6395597e87599 – < cd2396fc9684d2cfd3f3c3f09c79d6d9d725b0ca
- affected 8660484ed1cf3261e89e0bad94c6395597e87599 – < 5eecb11b543f9f417bcf0dea239ff99c6af65dbd
- affected 6.4
- unaffected < 6.4
- unaffected 6.6.160 – ≤ 6.6.*
- unaffected 6.12.110 – ≤ 6.12.*
- unaffected 6.18.52 – ≤ 6.18.*
- unaffected 7.2.6 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References5
- https://git.kernel.org/stable/c/a3205bd1f218053575589b14caf8df667f344134 (opens in a new tab)
- https://git.kernel.org/stable/c/2c85e0fb528e039aa8ea1e9c2a1f64347f990541 (opens in a new tab)
- https://git.kernel.org/stable/c/b2709aad7599f6fd957939b60f4a8323c8f08072 (opens in a new tab)
- https://git.kernel.org/stable/c/cd2396fc9684d2cfd3f3c3f09c79d6d9d725b0ca (opens in a new tab)
- https://git.kernel.org/stable/c/5eecb11b543f9f417bcf0dea239ff99c6af65dbd (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-2026-81884 (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-2026-90291)Record last updated .