CVE-2025-39716parisc: Revise __get_user() to probe user read access
- 5.5MediumCVSS 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: parisc: Revise __get_user() to probe user read access Because of the way read access support is implemented, read access interruptions are only triggered at privilege levels 2 and 3. The kernel executes at privilege level 0, so __get_user() never triggers a read access interruption (code 26). Thus, it is currently possible for user code to access a read protected address via a system call. Fix this by probing read access rights at privilege level 3 (PRIV_USER) and setting __gu_err to -EFAULT (-14) if access isn't allowed. Note the cmpiclr instruction does a 32-bit compare because COND macro doesn't work inside asm.
Timeline
ID reserved
By Linux
- 5 months later
· 5 months later
Published
- 8 months later
· 8 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)
- 0.16% · top 95% 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 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 28a9b71671fb4a2993ef85b8ef6f117ea63894fe
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 4c981077255acc2ed5b3df6e8dd0125c81b626a9
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < f410ef9a032caf98117256b22139c31342d7bb06
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 741b163e440683195b8fd4fc8495fcd0105c6ab7
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 89f686a0fb6e473a876a9a60a13aec67a62b9a7e
- affected 2.6.12
- unaffected < 2.6.12
- unaffected 6.1.149 – ≤ 6.1.*
- unaffected 6.6.103 – ≤ 6.6.*
- unaffected 6.12.44 – ≤ 6.12.*
- unaffected 6.16.4 – ≤ 6.16.*
- unaffected 6.17 – ≤ *
References
References7
- https://git.kernel.org/stable/c/28a9b71671fb4a2993ef85b8ef6f117ea63894fe (opens in a new tab)
- https://git.kernel.org/stable/c/4c981077255acc2ed5b3df6e8dd0125c81b626a9 (opens in a new tab)
- https://git.kernel.org/stable/c/f410ef9a032caf98117256b22139c31342d7bb06 (opens in a new tab)
- https://git.kernel.org/stable/c/741b163e440683195b8fd4fc8495fcd0105c6ab7 (opens in a new tab)
- https://git.kernel.org/stable/c/89f686a0fb6e473a876a9a60a13aec67a62b9a7e (opens in a new tab)
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-032379.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-2025-31511 (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-2025-39716)Record last updated .