5.5

CVE-2026-45964: linux

CVSS: 5.5v3.1MediumAnalyzed
AliasesUBUNTU-CVE-2026-45964DEBIAN-CVE-2026-45964
Published 27-05-2026Last modified 27-05-2026
Open JSON

Vulnerability summary

CVE-2026-45964 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.16% chance of exploitation in the next 30 days, higher than 5.1% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.16%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 36 · Related 36
OPENSUSE-SU-2026:21388-1SUSE-SU-2026:22433-1SUSE-SU-2026:22436-1SUSE-SU-2026:22458-1SUSE-SU-2026:22460-1SUSE-SU-2026:22742-1

Timeline

  1. 27-05-2026
    PublishedVulnerability first disclosed.

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.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.16%

Chance of exploitation in the next 30 days

Percentile

5%

Versus all other CVEs

30-day change

0.00 pp

From 0.16% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.16%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubuntu153 products
  • linuxAll versions (No fix recorded) | < 5.15.0-186.196 | < 6.8.0-134.134
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1112.119 | < 6.8.0-1060.63
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e, < 3b2b6c42070ce4204936288253baf101e995c2d3 | ≥ 5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e, < b559be2ec6cdb2e9c2c36c23fbbd4690d8a5c3f7 | ≥ 5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e, < a1bc9561b617ec7e2d09e6c134d1db8fcf9ca4a6 | ≥ 5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e, < 655c9ba9915f05266998dbbf4b76b3c79b8a70aa | ≥ 5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e, < e464e26b2457005c87e158570498274b9f3b90c7 | ≥ 5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e, < c20f925214249bb4fc04f7e197bea142a6438af6 | ≥ 5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e, < a2d4e9a76de0b2178001214ba5de5bf94a7354aa | ≥ 5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e, < dd2fdc3504592d85e549c523b054898a036a6afe | 5.2
  • linux_kernel≥ 5.2, < 5.10.252 | ≥ 5.11, < 5.15.202 | ≥ 5.16, < 6.1.165 | ≥ 6.2, < 6.6.128 | ≥ 6.7, < 6.12.75 | ≥ 6.13, < 6.18.14 | ≥ 6.19, < 6.19.4
Debian1 product
  • linux< 6.1.170-1 | < 6.12.85-1 | < 6.18.14-1

3 vendors · 156 products

References

37 links
Show all 37 references