5.5

CVE-2025-21645: platform/x86/amd/pmc: Only disable IRQ1 wakeup where i8042 actually enabled it

Modified
AliasesUBUNTU-CVE-2025-21645DEBIAN-CVE-2025-21645
Published 19-01-2025Last modified 15-10-2026

Vulnerability summary

CVE-2025-21645 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.25% chance of exploitation in the next 30 days, higher than 16.1% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.25%
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 26 · Related 24
DLA-4271-1DSA-5925-1MGASA-2025-0030MGASA-2025-0032SUSE-SU-2025:0289-1SUSE-SU-2025:0428-1

Timeline

  1. 19-01-2025
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: platform/x86/amd/pmc: Only disable IRQ1 wakeup where i8042 actually enabled it Wakeup for IRQ1 should be disabled only in cases where i8042 had actually enabled it, otherwise "wake_depth" for this IRQ will try to drop below zero and there will be an unpleasant WARN() logged: kernel: atkbd serio0: Disabling IRQ1 wakeup source to avoid platform firmware bug kernel: ------------[ cut here ]------------ kernel: Unbalanced IRQ 1 wake disable kernel: WARNING: CPU: 10 PID: 6431 at kernel/irq/manage.c:920 irq_set_irq_wake+0x147/0x1a0 The PMC driver uses DEFINE_SIMPLE_DEV_PM_OPS() to define its dev_pm_ops which sets amd_pmc_suspend_handler() to the .suspend, .freeze, and .poweroff handlers. i8042_pm_suspend(), however, is only set as the .suspend handler. Fix the issue by call PMC suspend handler only from the same set of dev_pm_ops handlers as i8042_pm_suspend(), which currently means just the .suspend handler. To reproduce this issue try hibernating (S4) the machine after a fresh boot without putting it into s2idle first. [ij: edited the commit message.]

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.25%

Chance of exploitation in the next 30 days

Percentile

16%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.25% 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

No weakness data has been published for this record.

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu124 products
  • linuxAll versions (No fix recorded) | < 6.8.0-60.63
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 6.8.0-1029.31
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 72e5a83b7c8401856cc3732150af24e43726717a, < ab47d72b736e78d3c2370b26e0bfc46eb0918391 | ≥ 8e60615e8932167057b363c11a7835da7f007106, < 5cc621085e2b7a9b1905a98f8e5a86bb4aea2016 | ≥ 8e60615e8932167057b363c11a7835da7f007106, < b25778c87a6bce40c31e92364f08aa6240309e25 | ≥ 8e60615e8932167057b363c11a7835da7f007106, < dd410d784402c5775f66faf8b624e85e41c38aaf | 3fc9dc0340e0b5df8059313537b55f82c1e84e94 | ≥ 6.1.11, < 6.1.140 | ≥ 5.15.95, < 5.16 | 6.2
  • linux_kernelEOL≥ 5.15.95, < 5.16 | ≥ 6.1.11, < 6.1.140 | ≥ 6.2.1, < 6.6.72 | ≥ 6.7, < 6.12.10 | 6.2 | 6.2:rc6 | 6.2:rc7 | 6.2:rc8 | 6.13:rc1 | 6.13:rc2 | 6.13:rc3 | 6.13:rc4 | 6.13:rc5 | 6.13:rc6
Debian1 product
  • linux< 6.1.140-1 | < 6.12.10-1

3 vendors · 127 products

References

27 links
Show all 27 references