CVE-2025-38565 | perf/core: Exit early on perf_mmap() fail

In the Linux kernel, the following vulnerability has been resolved: perf/core: Exit early on perf_mmap() fail When perf_mmap() fails to allocate a buffer, it still invokes the event_mapped() callback of the related event. On X86 this might increase the perf_rdpmc_allowed reference counter. But nothing undoes this as perf_mmap_close() is never called in this case, which causes another reference count leak. Return early on failure to prevent that.

Published: 2025-08-19 Last update: 2026-01-08 Assigner: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2025-38565 is rated Low Risk (33/100): CVSS High severity, with low exploitation likelihood (EPSS 0.02%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2025-38565

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-01-09 0.06% 0.02% -0.04%
2 2025-12-19 0.02% 0.06% +0.04%
3 2025-08-20 — 0.02% —

Full EPSS history (3 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-38565

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.8 3.1 HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.8 5.9 [email protected]

Weakness enumeration for CVE-2025-38565

OS Trackers for CVE-2025-38565

vendor priority summary link
debian not yet assigned CVE-2025-38565 not yet assigned priority: Debian including 2 source packages (linux, linux-6.1), 6 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 6. https://security-tracker.debian.org/tracker/CVE-2025-38565
redhat low — https://access.redhat.com/security/cve/CVE-2025-38565
suse low — https://www.suse.com/security/cve/CVE-2025-38565/
ubuntu medium CVE-2025-38565 medium priority: Ubuntu including 158 source packages (linux, linux-allwinner-5.19, …), 1414 status rows across 9 suites (bionic, focal, jammy, noble, plucky, questing, trusty, upstream, xenial): DNE 1017, ignored 164, released 135, needed 76, not-affected 19, needs-triage 2, pending 1. https://ubuntu.com/security/CVE-2025-38565

Affected software / configurations for CVE-2025-38565

Vendor Product Version Raw CPE
linux linux_kernel >= 4.0, < 5.4.297 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 5.5, < 5.10.241 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 5.11, < 5.15.190 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 5.16, < 6.1.148 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 6.2, < 6.6.102 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 6.7, < 6.12.42 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 6.13, < 6.15.10 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 6.16, < 6.16.1 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
debian debian_linux 11.0 cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*

References for CVE-2025-38565

URL Tags
https://git.kernel.org/stable/c/07091aade394f690e7b655578140ef84d0e8d7b0 Patch
https://git.kernel.org/stable/c/163b0d1a209fe0df5476c1df2330ca12b55abf92 Patch
https://git.kernel.org/stable/c/27d44145bd576bbef9bf6165bcd78128ec3e6cbd Patch
https://git.kernel.org/stable/c/5ffda7f3ed76ec8defc19d985e33b3b82ba07839 Patch
https://git.kernel.org/stable/c/7ff8521f30c4c2fcd4e88bd7640486602bf8a650 Patch
https://git.kernel.org/stable/c/92043120a2e992800580855498ab8507e1b22db9 Patch
https://git.kernel.org/stable/c/9b90a48c7de828a15c7a4fc565d46999c6e22d6b Patch
https://git.kernel.org/stable/c/de85e72598d89880a02170a1cbc27b35a7d978a9 Patch
https://git.kernel.org/stable/c/f41e9eba77bf97626e04296dc5677d02816d2432 Patch
https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html Mailing List Third Party Advisory
cvelogic Threat Intelligence