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CVE-2025-40211· NVD / CVE Program· CNA Linux

ACPI: video: Fix use-after-free in acpi_video_switch_brightness()

Noroxi assessment

Priority: Monitor (action score 0/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.19% (FIRST EPSS).
  • Fixed version: Linux Linux 293125536ef5521328815fa7c76d5f9eb1635659, 3f803ccf5a0c043e7c8b83f6665b082401fc8bee, 4e85246ec0d019dfba86ba54d841ef6694f97149; azl3 kernel 6.6.112.1-2 on Azure Linux 3.0 6.6.117.1-1.

Low priority for now. Upgrade to Linux Linux 293125536ef5521328815fa7c76d5f9eb1635659, 3f803ccf5a0c043e7c8b83f6665b082401fc8bee, 4e85246ec0d019dfba86ba54d841ef6694f97149; azl3 kernel 6.6.112.1-2 on Azure Linux 3.0 6.6.117.1-1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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 ]

—No exploit Fix available
Published
Nov 21, 2025
Updated
Oct 19, 2026
EPSS
0.1% · 8th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

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  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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  • when exploit code appears or is weaponized
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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 3.17affected
    • 8ab58e8e7e097bae5fe39cbc67eb93a91f7134b7 and later · before 3f803ccf5a0c043e7c8b83f6665b082401fc8beeaffected · git
    • 8ab58e8e7e097bae5fe39cbc67eb93a91f7134b7 and later · before ba1704316492a0496c69334338ea1fdbf4c2fd34affected · git
    • 8ab58e8e7e097bae5fe39cbc67eb93a91f7134b7 and later · before bc78a4f51d548c1ccc3d1967c2b394bf687c86e9affected · git
    • 8ab58e8e7e097bae5fe39cbc67eb93a91f7134b7 and later · before a63a5b6fb508d78fe57ae3b159d9ef3af7ba80e9affected · git
    • 8ab58e8e7e097bae5fe39cbc67eb93a91f7134b7 and later · before 4e85246ec0d019dfba86ba54d841ef6694f97149affected · git
    • 8ab58e8e7e097bae5fe39cbc67eb93a91f7134b7 and later · before de5fc93275a4a459fe2f7cb746984f2ab3e8292aaffected · git
    • 8ab58e8e7e097bae5fe39cbc67eb93a91f7134b7 and later · before 293125536ef5521328815fa7c76d5f9eb1635659affected · git
    • 8ab58e8e7e097bae5fe39cbc67eb93a91f7134b7 and later · before 8f067aa59430266386b83c18b983ca583faa6a11affected · git
    • before 3.17not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:11linux-6.1before 6.1.159-1~deb11u16.1.159-1~deb11u1
Debian:12linuxbefore 6.1.159-16.1.159-1
Debian:13linuxbefore 6.12.63-16.12.63-1
Debian:14linuxbefore 6.17.8-16.17.8-1
openSUSE:Leap 16.0dtb-aarch64before 6.12.0-160000.9.16.12.0-160000.9.1
openSUSE:Leap 16.0kernel-64kbbefore 6.12.0-160000.9.16.12.0-160000.9.1
openSUSE:Leap 16.0kernel-azurebefore 6.12.0-160000.9.16.12.0-160000.9.1
openSUSE:Leap 16.0kernel-defaultbefore 6.12.0-160000.9.16.12.0-160000.9.1
openSUSE:Leap 16.0kernel-default-basebefore 6.12.0-160000.9.1.160000.2.66.12.0-160000.9.1.160000.2.6
openSUSE:Leap 16.0kernel-docsbefore 6.12.0-160000.9.16.12.0-160000.9.1
openSUSE:Leap 16.0kernel-kvmsmallbefore 6.12.0-160000.9.16.12.0-160000.9.1
openSUSE:Leap 16.0kernel-obs-buildbefore 6.12.0-160000.9.16.12.0-160000.9.1
openSUSE:Leap 16.0kernel-obs-qabefore 6.12.0-160000.9.16.12.0-160000.9.1
openSUSE:Leap 16.0kernel-rtbefore 6.12.0-160000.9.16.12.0-160000.9.1
openSUSE:Leap 16.0kernel-sourcebefore 6.12.0-160000.9.16.12.0-160000.9.1
openSUSE:Leap 16.0kernel-symsbefore 6.12.0-160000.9.16.12.0-160000.9.1
openSUSE:Leap 16.0kernel-zfcpdumpbefore 6.12.0-160000.9.16.12.0-160000.9.1
SUSE:Linux Enterprise Server 16.0kernel-azurebefore 6.12.0-160000.9.16.12.0-160000.9.1
SUSE:Linux Enterprise Server 16.0kernel-docsbefore 6.12.0-160000.9.16.12.0-160000.9.1
SUSE:Linux Enterprise Server 16.0kernel-kvmsmallbefore 6.12.0-160000.9.16.12.0-160000.9.1
SUSE:Linux Enterprise Server 16.0kernel-obs-qabefore 6.12.0-160000.9.16.12.0-160000.9.1
SUSE:Linux Enterprise Server 16.0kernel-symsbefore 6.12.0-160000.9.16.12.0-160000.9.1
SUSE:Linux Enterprise Server 16.0kernel-zfcpdumpbefore 6.12.0-160000.9.16.12.0-160000.9.1
SUSE:Linux Micro 6.2kernel-64kbbefore 6.12.0-160000.9.16.12.0-160000.9.1

+5

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2025-40209Nov 21, 2025 · btrfs: fix memory leak of qgroup_list in btrfs_add_qgroup_relation
    0Monitor
  • ← EarlierCVE-2025-40210Nov 21, 2025 · Revert "NFSD: Remove the cap on number of operations per NFSv4 COMPOUND"
    30Monitor
  • Later →CVE-2025-40212Nov 24, 2025 · nfsd: fix refcount leak in nfsd_set_fh_dentry()
    39Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux293125536ef5521328815fa7c76d5f9eb1635659Vendor (CNA)
Linux Linux3f803ccf5a0c043e7c8b83f6665b082401fc8beeVendor (CNA)
Linux Linux4e85246ec0d019dfba86ba54d841ef6694f97149Vendor (CNA)
Linux Linux8f067aa59430266386b83c18b983ca583faa6a11Vendor (CNA)
Linux Linuxa63a5b6fb508d78fe57ae3b159d9ef3af7ba80e9Vendor (CNA)
Linux Linuxba1704316492a0496c69334338ea1fdbf4c2fd34Vendor (CNA)
Linux Linuxbc78a4f51d548c1ccc3d1967c2b394bf687c86e9Vendor (CNA)
Linux Linuxde5fc93275a4a459fe2f7cb746984f2ab3e8292aVendor (CNA)
azl3 kernel 6.6.112.1-2 on Azure Linux 3.06.6.117.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
debian:linux6.1.159-1 · Debian:12Package registry (OSV)
debian:linux-6.16.1.159-1~deb11u1 · Debian:11Package registry (OSV)
opensuse:dtb-aarch646.12.0-160000.9.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-64kb6.12.0-160000.9.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-azure6.12.0-160000.9.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-default6.12.0-160000.9.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-default-base6.12.0-160000.9.1.160000.2.6 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-docs6.12.0-160000.9.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-kvmsmall6.12.0-160000.9.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-obs-build6.12.0-160000.9.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-obs-qa6.12.0-160000.9.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-rt6.12.0-160000.9.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-source6.12.0-160000.9.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-syms6.12.0-160000.9.1 · openSUSE:Leap 16.0Package registry (OSV)
suse:kernel-64kb6.12.0-160000.9.1 · SUSE:Linux Micro 6.2Package registry (OSV)
suse:kernel-azure6.12.0-160000.9.1 · SUSE:Linux Enterprise Server 16.0Package registry (OSV)
suse:kernel-default6.12.0-160000.9.1 · SUSE:Linux Micro 6.2Package registry (OSV)
suse:kernel-default-base6.12.0-160000.9.1.160000.2.6 · SUSE:Linux Micro 6.2Package registry (OSV)
suse:kernel-docs6.12.0-160000.9.1 · SUSE:Linux Enterprise Server 16.0Package registry (OSV)
suse:kernel-kvmsmall6.12.0-160000.9.1 · SUSE:Linux Enterprise Server 16.0Package registry (OSV)
suse:kernel-obs-build6.12.0-160000.9.1 · SUSE:Linux Micro Extras 6.2Package registry (OSV)

+5

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (7 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records