CVE-2025-40211: linux

CVSS: UnknownDeferred
AliasesUBUNTU-CVE-2025-40211DEBIAN-CVE-2025-40211
Published 21-11-2025Last modified 16-06-2026
Open JSON

Vulnerability summary

CVE-2025-40211 is a vulnerability in linux with no CVSS score yet. EPSS estimates a 0.19% chance of exploitation in the next 30 days, higher than 8.6% of scored vulnerabilities.

Overall risk
0/100
0100
Minimal · default modelHow is this calculated?
CVSS score
Not scored
010
No CVSS score recorded
EPSS score
0.19%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 40 · Related 38
DLA-4404-1DLA-4436-1OPENSUSE-SU-2026:20145-1SUSE-SU-2026:0278-1SUSE-SU-2026:0281-1SUSE-SU-2026:0293-1

Timeline

  1. 21-11-2025
    PublishedVulnerability first disclosed.
  2. 16-06-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: ACPI: video: Fix use-after-free in acpi_video_switch_brightness() The switch_brightness_work delayed work accesses device->brightness and device->backlight, freed by acpi_video_dev_unregister_backlight() during device removal. If the work executes after acpi_video_bus_unregister_backlight() frees these resources, it causes a use-after-free when acpi_video_switch_brightness() dereferences device->brightness or device->backlight. Fix this by calling cancel_delayed_work_sync() for each device's switch_brightness_work in acpi_video_bus_remove_notify_handler() after removing the notify handler that queues the work. This ensures the work completes before the memory is freed. [ rjw: Changelog edit ]

CVSS metrics

Risk metrics not yet published.

EPSS trend

Probability

0.19%

Chance of exploitation in the next 30 days

Percentile

9%

Versus all other CVEs

30-day change

0.00 pp

From 0.19% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.19%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Ubuntu153 products
  • linuxAll versions (No fix recorded) | < 5.15.0-173.183 | < 6.8.0-106.106 | < 6.17.0-14.14
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1103.110 | < 6.8.0-1050.53 | < 6.17.0-1007.7
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian1 product
  • linux< 6.1.159-1 | < 6.12.63-1 | < 6.17.8-1
Linux1 product
  • linux≥ 8ab58e8e7e097bae5fe39cbc67eb93a91f7134b7, < 3f803ccf5a0c043e7c8b83f6665b082401fc8bee | ≥ 8ab58e8e7e097bae5fe39cbc67eb93a91f7134b7, < ba1704316492a0496c69334338ea1fdbf4c2fd34 | ≥ 8ab58e8e7e097bae5fe39cbc67eb93a91f7134b7, < bc78a4f51d548c1ccc3d1967c2b394bf687c86e9 | ≥ 8ab58e8e7e097bae5fe39cbc67eb93a91f7134b7, < a63a5b6fb508d78fe57ae3b159d9ef3af7ba80e9 | ≥ 8ab58e8e7e097bae5fe39cbc67eb93a91f7134b7, < 4e85246ec0d019dfba86ba54d841ef6694f97149 | ≥ 8ab58e8e7e097bae5fe39cbc67eb93a91f7134b7, < de5fc93275a4a459fe2f7cb746984f2ab3e8292a | ≥ 8ab58e8e7e097bae5fe39cbc67eb93a91f7134b7, < 293125536ef5521328815fa7c76d5f9eb1635659 | ≥ 8ab58e8e7e097bae5fe39cbc67eb93a91f7134b7, < 8f067aa59430266386b83c18b983ca583faa6a11 | 3.17

3 vendors · 155 products

References

38 links
Show all 38 references