perf: Fix sample vs do_exit() (Linux Linux)

CVE-2025-38424
HIGH 7.8

At a glance

Source
NVD
EPSS
EPSS 0.22 % · percentile 12 ()
State
PUBLISHED
Published
Updated
Assigner
Linux
NVD status
Modified

Description

In the Linux kernel, the following vulnerability has been resolved: perf: Fix sample vs do_exit() Baisheng Gao reported an ARM64 crash, which Mark decoded as being a synchronous external abort -- most likely due to trying to access MMIO in bad ways. The crash further shows perf trying to do a user stack sample while in exit_mmap()'s tlb_finish_mmu() -- i.e. while tearing down the address space it is trying to access. It turns out that we stop perf after we tear down the userspace mm; a receipie for disaster, since perf likes to access userspace for various reasons. Flip this order by moving up where we stop perf in do_exit(). Additionally, harden PERF_SAMPLE_CALLCHAIN and PERF_SAMPLE_STACK_USER to abort when the current task does not have an mm (exit_mm() makes sure to set current->mm = NULL; before commencing with the actual teardown). Such that CPU wide events don't trip on this same problem.

References

Scores

VersionScoreVectorScored by
CVSS 3.1HIGH 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HLinux
CVSS 3.1HIGH 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HNVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary)
CVSS 3.1MEDIUM 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HNVD · nvd@nist.gov (Primary)

European references

CERT-FR advisories

Affected configurations (NVD CPE)

Affected products

ProductVersions
Linux · Linuxaffected c5ebcedb566ef17bda7b02686e0d658a7bb42ee7 < 7b8f3c72175c6a63a95cf2e219f8b78e2baad34e ; affected c5ebcedb566ef17bda7b02686e0d658a7bb42ee7 < 507c9a595bad3abd107c6a8857d7fd125d89f386 ; affected c5ebcedb566ef17bda7b02686e0d658a7bb42ee7 < a9f6aab7910a0ef2895797f15c947f6d1053160f ; affected c5ebcedb566ef17bda7b02686e0d658a7bb42ee7 < 975ffddfa2e19823c719459d2364fcaa17673964 ; affected c5ebcedb566ef17bda7b02686e0d658a7bb42ee7 < 2ee6044a693735396bb47eeaba1ac3ae26c1c99b ; affected c5ebcedb566ef17bda7b02686e0d658a7bb42ee7 < 456019adaa2f5366b89c868dea9b483179bece54
Linux · Linuxaffected 3.7 ; unaffected 0 < 3.7 ; unaffected 5.4.295 ≤ 5.4.* ; unaffected 5.10.239 ≤ 5.10.* ; unaffected 5.15.186 ≤ 5.15.* ; unaffected 6.1.142 ≤ 6.1.*

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD