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Vulnerability record · CVE-2026-64370 · published 25 July 2026

CVE-2026-64370: Linux kernel vulnerability

Linux · Linux Kernel

In the Linux kernel, the following vulnerability has been resolved: posix-cpu-timers: Fix pid refcount leak in do_cpu_nanosleep() error path In do_cpu_nanosleep(), posix_cpu_timer_create() takes a pid reference via get_pid() and stores it in timer.it.cpu.pid. If the subsequent posix_cpu_timer_set() call fails, the function returns immediately without calling posix_cpu_timer_del() to release the pid reference, causing a leak. Fix it by calling posix_cpu_timer_del() before the unlock-and-return on the error path, consistent with the other exit paths in the same function.

5.5 CVSS 3.1 Medium EPSS 0.13% · top 98.1%
5.5CVSS 3.1 base score
0.13%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
9References
8 Sep 2026Last modified by NVD

Description

In the Linux kernel, the following vulnerability has been resolved: posix-cpu-timers: Fix pid refcount leak in do_cpu_nanosleep() error path In do_cpu_nanosleep(), posix_cpu_timer_create() takes a pid reference via get_pid() and stores it in timer.it.cpu.pid. If the subsequent posix_cpu_timer_set() call fails, the function returns immediately without calling posix_cpu_timer_del() to release the pid reference, causing a leak. Fix it by calling posix_cpu_timer_del() before the unlock-and-return on the error path, consistent with the other exit paths in the same function.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/7776f9226e99eb49d97492b0b445027cfcb189da Patch
https://git.kernel.org/stable/c/87bd2ad568e15b90d5f7d4bcd70342d05dad649c Patch
https://git.kernel.org/stable/c/8a270b1258797f61b61da44f8bfd41a581b5c85b Patch
https://git.kernel.org/stable/c/8f06363446c5d043c9a7c008b250040e9de98cf9 Patch
https://git.kernel.org/stable/c/afed3cdc1cca133f804fcf57ff228974f424b23a Patch
https://git.kernel.org/stable/c/d605d00085adc3fddf67de01dc2a44aebf1a3fb5 Patch
https://git.kernel.org/stable/c/e5ffc638faf5dc7d9dc85c9a95e10bf97442e0c0 Patch
https://git.kernel.org/stable/c/eb4cec29a78334d09bcfb41c0660cdd62ba05843 Patch
https://cert-portal.siemens.com/productcert/html/ssa-019113.html Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2026-64370), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.