CVE-2026-45964SUNRPC: fix gss_auth kref leak in gss_alloc_msg error path
- 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: SUNRPC: fix gss_auth kref leak in gss_alloc_msg error path Commit 5940d1cf9f42 ("SUNRPC: Rebalance a kref in auth_gss.c") added a kref_get(&gss_auth->kref) call to balance the gss_put_auth() done in gss_release_msg(), but forgot to add a corresponding kref_put() on the error path when kstrdup_const() fails. If service_name is non-NULL and kstrdup_const() fails, the function jumps to err_put_pipe_version which calls put_pipe_version() and kfree(gss_msg), but never releases the gss_auth reference. This leads to a kref leak where the gss_auth structure is never freed. Add a forward declaration for gss_free_callback() and call kref_put() in the err_put_pipe_version error path to properly release the reference taken earlier.
Timeline
ID reserved
By Linux
- 14 days later
· 14 days later
Published
- 5 months later
· 5 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)
- 0.16% · top 95% of all CVEs (14 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected 5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e – < 3b2b6c42070ce4204936288253baf101e995c2d3
- affected 5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e – < b559be2ec6cdb2e9c2c36c23fbbd4690d8a5c3f7
- affected 5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e – < a1bc9561b617ec7e2d09e6c134d1db8fcf9ca4a6
- affected 5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e – < 655c9ba9915f05266998dbbf4b76b3c79b8a70aa
- affected 5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e – < e464e26b2457005c87e158570498274b9f3b90c7
- affected 5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e – < c20f925214249bb4fc04f7e197bea142a6438af6
- affected 5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e – < a2d4e9a76de0b2178001214ba5de5bf94a7354aa
- affected 5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e – < dd2fdc3504592d85e549c523b054898a036a6afe
- affected 5.2
- unaffected < 5.2
- unaffected 5.10.252 – ≤ 5.10.*
- unaffected 5.15.202 – ≤ 5.15.*
- unaffected 6.1.165 – ≤ 6.1.*
- unaffected 6.6.128 – ≤ 6.6.*
- unaffected 6.12.75 – ≤ 6.12.*
- unaffected 6.18.14 – ≤ 6.18.*
- unaffected 6.19.4 – ≤ 6.19.*
- unaffected 7.0 – ≤ *
References
References8
- https://git.kernel.org/stable/c/3b2b6c42070ce4204936288253baf101e995c2d3 (opens in a new tab)
- https://git.kernel.org/stable/c/b559be2ec6cdb2e9c2c36c23fbbd4690d8a5c3f7 (opens in a new tab)
- https://git.kernel.org/stable/c/a1bc9561b617ec7e2d09e6c134d1db8fcf9ca4a6 (opens in a new tab)
- https://git.kernel.org/stable/c/655c9ba9915f05266998dbbf4b76b3c79b8a70aa (opens in a new tab)
- https://git.kernel.org/stable/c/e464e26b2457005c87e158570498274b9f3b90c7 (opens in a new tab)
- https://git.kernel.org/stable/c/c20f925214249bb4fc04f7e197bea142a6438af6 (opens in a new tab)
- https://git.kernel.org/stable/c/a2d4e9a76de0b2178001214ba5de5bf94a7354aa (opens in a new tab)
- https://git.kernel.org/stable/c/dd2fdc3504592d85e549c523b054898a036a6afe (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-2026-32248 (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-2026-45964)Record last updated .