CVE-2026-45964

SUNRPC: fix gss_auth kref leak in gss_alloc_msg error path

State: Published
Severity: Not scored
Published: May 27, 2026
Updated: May 27, 2026
Reserved: May 13, 2026

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e to before 3b2b6c42070ce4204936288253baf101e995c2d3Affected 5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e to before b559be2ec6cdb2e9c2c36c23fbbd4690d8a5c3f7Affected 5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e to before a1bc9561b617ec7e2d09e6c134d1db8fcf9ca4a6Affected 5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e to before 655c9ba9915f05266998dbbf4b76b3c79b8a70aaAffected 5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e to before e464e26b2457005c87e158570498274b9f3b90c7Affected 5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e to before c20f925214249bb4fc04f7e197bea142a6438af6Affected 5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e to before a2d4e9a76de0b2178001214ba5de5bf94a7354aaAffected 5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e to before dd2fdc3504592d85e549c523b054898a036a6afeAffected
LinuxLinux	5.2Affected before 5.2Not affected 5.10.252 through 5.10.Not affected 5.15.202 through 5.15.Not affected 6.1.165 through 6.1.Not affected 6.6.128 through 6.6.Not affected 6.12.75 through 6.12.Not affected 6.18.14 through 6.18.Not affected 6.19.4 through 6.19.*Not affected 7.0 and laterNot affected

Product

Versions

LinuxLinux

5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e to before 3b2b6c42070ce4204936288253baf101e995c2d3Affected
5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e to before b559be2ec6cdb2e9c2c36c23fbbd4690d8a5c3f7Affected
5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e to before a1bc9561b617ec7e2d09e6c134d1db8fcf9ca4a6Affected
5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e to before 655c9ba9915f05266998dbbf4b76b3c79b8a70aaAffected
5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e to before e464e26b2457005c87e158570498274b9f3b90c7Affected
5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e to before c20f925214249bb4fc04f7e197bea142a6438af6Affected
5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e to before a2d4e9a76de0b2178001214ba5de5bf94a7354aaAffected
5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e to before dd2fdc3504592d85e549c523b054898a036a6afeAffected

LinuxLinux

5.2Affected
before 5.2Not affected
5.10.252 through 5.10.*Not affected
5.15.202 through 5.15.*Not affected
6.1.165 through 6.1.*Not affected
6.6.128 through 6.6.*Not affected
6.12.75 through 6.12.*Not affected
6.18.14 through 6.18.*Not affected
6.19.4 through 6.19.*Not affected
7.0 and laterNot affected

References

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