CVE-2026-45964SUNRPC: fix gss_auth kref leak in gss_alloc_msg error path
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Analyzed
- Record last updated
- May 27, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | 5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e builds before 3b2b6c42070ce4204936288253baf101e995c2d3; from 5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e before b559be2ec6cdb2e9c2c36c23fbbd4690d8a5c3f7; from 5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e before a1bc9561b617ec7e2d09e6c134d1db8fcf9ca4a6; 5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e builds before 655c9ba9915f05266998dbbf4b76b3c79b8a70aa; from 5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e before e464e26b2457005c87e158570498274b9f3b90c7; from 5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e before c20f925214249bb4fc04f7e197bea142a6438af6; from 5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e before a2d4e9a76de0b2178001214ba5de5bf94a7354aa; from 5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e before dd2fdc3504592d85e549c523b054898a036a6afe | CNA record |
linux linux_kernel linux:linux_kernel | from 5.2 before 5.10.252; from 5.11 before 5.15.202; from 5.16 before 6.1.165; from 6.2 before 6.6.128; from 6.7 before 6.12.75; from 6.13 before 6.18.14; from 6.19 before 6.19.4 | NVD |
References
- https://git.kernel.org/stable/c/3b2b6c42070ce4204936288253baf101e995c2d3patch
- https://git.kernel.org/stable/c/b559be2ec6cdb2e9c2c36c23fbbd4690d8a5c3f7patch
- https://git.kernel.org/stable/c/a1bc9561b617ec7e2d09e6c134d1db8fcf9ca4a6patch
- https://git.kernel.org/stable/c/655c9ba9915f05266998dbbf4b76b3c79b8a70aapatch
- https://git.kernel.org/stable/c/e464e26b2457005c87e158570498274b9f3b90c7patch
- https://git.kernel.org/stable/c/c20f925214249bb4fc04f7e197bea142a6438af6patch
- https://git.kernel.org/stable/c/a2d4e9a76de0b2178001214ba5de5bf94a7354aapatch
- https://git.kernel.org/stable/c/dd2fdc3504592d85e549c523b054898a036a6afepatch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.