7.3

CVE-2025-22094: powerpc/perf: Fix ref-counting on the PMU 'vpa_pmu'

Modified
AliasesUBUNTU-CVE-2025-22094DEBIAN-CVE-2025-22094
Published 16-04-2025Last modified 05-08-2026

Vulnerability summary

CVE-2025-22094 is a high (CVSS 7.3) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 0.21% chance of exploitation in the next 30 days, higher than 11% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7.3, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.3/10
010
High · v3.1 (CVE.org)
EPSS score
0.21%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 6 · Related 6
SUSE-SU-2025:01951-1SUSE-SU-2025:01967-1SUSE-SU-2025:01972-1USN-7594-1USN-7594-2USN-7594-3

Timeline

  1. 16-04-2025
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: powerpc/perf: Fix ref-counting on the PMU 'vpa_pmu' Commit 176cda0619b6 ("powerpc/perf: Add perf interface to expose vpa counters") introduced 'vpa_pmu' to expose Book3s-HV nested APIv2 provided L1<->L2 context switch latency counters to L1 user-space via perf-events. However the newly introduced PMU named 'vpa_pmu' doesn't assign ownership of the PMU to the module 'vpa_pmu'. Consequently the module 'vpa_pmu' can be unloaded while one of the perf-events are still active, which can lead to kernel oops and panic of the form below on a Pseries-LPAR: BUG: Kernel NULL pointer dereference on read at 0x00000058 <snip> NIP [c000000000506cb8] event_sched_out+0x40/0x258 LR [c00000000050e8a4] __perf_remove_from_context+0x7c/0x2b0 Call Trace: [c00000025fc3fc30] [c00000025f8457a8] 0xc00000025f8457a8 (unreliable) [c00000025fc3fc80] [fffffffffffffee0] 0xfffffffffffffee0 [c00000025fc3fcd0] [c000000000501e70] event_function+0xa8/0x120 <snip> Kernel panic - not syncing: Aiee, killing interrupt handler! Fix this by adding the module ownership to 'vpa_pmu' so that the module 'vpa_pmu' is ref-counted and prevented from being unloaded when perf-events are initialized.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.21%

Chance of exploitation in the next 30 days

Percentile

11%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.21% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu77 products
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
  • linux-aws-5.13All versions (No fix recorded)
  • linux-aws-5.19All versions (No fix recorded)
Linux2 products
  • linux≥ 176cda0619b6c17a553625f6e2fcbc3981ad667d, < 70ea7c5189197c6f5acdcfd8a2651be2c41e2faa | ≥ 176cda0619b6c17a553625f6e2fcbc3981ad667d, < 6cf045b51e2c5721db7e55305f09ee32741e00f9 | ≥ 176cda0619b6c17a553625f6e2fcbc3981ad667d, < ff99d5b6a246715f2257123cdf6c4a29cb33aa78 | 6.13
  • linux_kernel≥ 6.13, < 6.13.11 | ≥ 6.14, < 6.14.2
Debian1 product
  • linuxAll versions (No fix recorded) | < 6.16.3-1

3 vendors · 80 products

References

10 links