CVE-2020-25704

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-12-02 · updated 2026-06-17
Weakness: CWE-401

Description

A flaw memory leak in the Linux kernel performance monitoring subsystem was found in the way if using PERF_EVENT_IOC_SET_FILTER. A local user could use this flaw to starve the resources causing denial of service.

Affected products

Debian Linux: 9.0
Linux kernel: through 5.9; 5.10-rc1, 5.10-rc2
Starwindsoftware Command Center: all versions
Starwindsoftware Starwind Hyperconverged Appliance: all versions
Starwindsoftware Starwind San & Nas: v8r12
Starwindsoftware Starwind Virtual San: v8-build14398

References

https://bugzilla.redhat.com/show_bug.cgi?id=1895961
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7bdb157cdebbf95a1cd94ed2e01b338714075d00
https://lists.debian.org/debian-lts-announce/2020/12/msg00015.html
https://lists.debian.org/debian-lts-announce/2020/12/msg00027.html
https://www.openwall.com/lists/oss-security/2020/11/09/1
https://www.starwindsoftware.com/security/sw-20220802-0003/
https://bugzilla.redhat.com/show_bug.cgi?id=1895961
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7bdb157cdebbf95a1cd94ed2e01b338714075d00
https://lists.debian.org/debian-lts-announce/2020/12/msg00015.html
https://lists.debian.org/debian-lts-announce/2020/12/msg00027.html
https://www.openwall.com/lists/oss-security/2020/11/09/1
https://www.starwindsoftware.com/security/sw-20220802-0003/

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