Home/CVE/A flaw memory leak in the Linux kernel performance monitoring subsystem was found in the way if using PERF_EVENT_IOC_SET
CVE

CVE-2020-25704

A flaw memory leak in the Linux kernel performance monitoring subsystem was found in the way if using PERF_EVENT_IOC_SET

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.

MEDIUM · CVSS 5.5 EPSS 0.00025
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-401Missing Release of Memory after Effective Lifetime
CWE-401Missing Release of Memory after Effective Lifetime
▤

Affected Products & Versions

7
linux kernel<= 5.9
linux kernelall versions
debian linuxall versions
starwindsoftware command centerall versions
starwindsoftware starwind hyperconverged applianceall versions
starwindsoftware starwind san \& nasall versions
starwindsoftware starwind virtual sanall versions
▣

Scoring & Timeline

5.5
MEDIUM · CVSS v3.1 · secalert@redhat.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD02 Dec 2020 · 01:15 AM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
⚑

Vendor Advisories

28
rhsaRHSA-2021:1578Moderate
rhsaRHSA-2021:1739Moderate
rhsaRHSA-2021:2719Important
rhsaRHSA-2021:2718Important
rhsaRHSA-2022:0063Moderate
🔗

References & Sources

6
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://bugzilla.redhat.com/show_bug.cgi?id=1895961Issue TrackingThird Party Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7bdb157cdebbf95a1cd94ed2e01b338714075d00PatchVendor Advisory
https://lists.debian.org/debian-lts-announce/2020/12/msg00015.htmlMailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2020/12/msg00027.htmlMailing ListThird Party Advisory
https://www.openwall.com/lists/oss-security/2020/11/09/1Mailing List
https://www.starwindsoftware.com/security/sw-20220802-0003/Third Party Advisory
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