NVD / CVE Program· CNA Linux

CVE-2026-45946: power: supply: ab8500: Fix use-after-free in power_supply_changed()

Noroxi assessment

Priority: Monitor (action score 31/100)

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: 0.16% (FIRST EPSS).
Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
Fixed version: Linux Linux 43cbb78ee047b9b12d096d40e3be265969d4c1f8, 46dbda27b028d78087667e8280966b99cec015ca, 5.14.
Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 43cbb78ee047b9b12d096d40e3be265969d4c1f8, 46dbda27b028d78087667e8280966b99cec015ca, 5.14 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: power: supply: ab8500: Fix use-after-free in power_supply_changed() Using the `devm_` variant for requesting IRQ _before_ the `devm_` variant for allocating/registering the `power_supply` handle, means that the `power_supply` handle will be deallocated/unregistered _before_ the interrupt handler (since `devm_` naturally deallocates in reverse allocation order). This means that during removal, there is a race condition where an interrupt can fire just _after_ the `power_supply` handle has been freed, *but* just _before_ the corresponding unregistration of the IRQ handler has run. This will lead to the IRQ handler calling `power_supply_changed()` with a freed `power_supply` handle. Which usually crashes the system or otherwise silently corrupts the memory... Note that there is a similar situation which can also happen during `probe()`; the possibility of an interrupt firing _before_ registering the `power_supply` handle. This would then lead to the nasty situation of using the `power_supply` handle *uninitialized* in `power_supply_changed()`. Commit 1c1f13a006ed ("power: supply: ab8500: Move to componentized binding") introduced this issue during a refactorization. Fix this racy use-after-free by making sure the IRQ is requested _after_ the registration of the `power_supply` handle.

HighCVSS 7.8 · v3.1—No exploit Fix available

Memory safety

BDU:2026-11783

Published: May 27, 2026
Updated: Jun 17, 2026
EPSS: 0.1% · 5th percentile
CWE: CWE-416

Report tools

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Action score

Monitor

Low priority for now.

CVSS: 31 / 40 · 7.8 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.1%

Get told when this record changes

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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Noroxi analysis

What does it mean in your environment?

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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.

Vendor	Product	CPE
linux	linux kernel	cpe:2.3:o:linux:linux_kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

linux linux kernel5.13.4 and later · before 5.15.202
linux linux kernel5.16 and later · before 6.1.165
linux linux kernel6.2 and later · before 6.6.128
linux linux kernel6.7 and later · before 6.12.75
linux linux kernel6.13 and later · before 6.18.14
linux linux kernel6.19 and later · before 6.19.4

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
- 341db343768bc44f3512facc464021730d64071c, 5.14affected
- 1c1f13a006ed0d71bb5664c8b7e3e77a28da3beb and later · before 43cbb78ee047b9b12d096d40e3be265969d4c1f8affected · git
- 1c1f13a006ed0d71bb5664c8b7e3e77a28da3beb and later · before 551672981fe227122258a25a385a05f5c0746ad6affected · git
- 1c1f13a006ed0d71bb5664c8b7e3e77a28da3beb and later · before f50433f2603def08b21a4bf2fd238687fb5cbde9affected · git
- 1c1f13a006ed0d71bb5664c8b7e3e77a28da3beb and later · before 847eeb6c0efcd76c7def73857cf798a4fcd8f79baffected · git
- 1c1f13a006ed0d71bb5664c8b7e3e77a28da3beb and later · before 709db4b476e254579d9c48ec34d397a41ca0c407affected · git
- 1c1f13a006ed0d71bb5664c8b7e3e77a28da3beb and later · before 46dbda27b028d78087667e8280966b99cec015caaffected · git
- 1c1f13a006ed0d71bb5664c8b7e3e77a28da3beb and later · before c4af8a98bb52825a5331ae1d0604c0ea6956ba4baffected · git
- 5.13.4 and later · before 5.14affected · semver
- before 5.14not affected · semver

Package-level exposure

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

Ecosystem	Package	Affected range	Fix
Debian:12	linux	before 6.1.170-1	6.1.170-1
Debian:13	linux	before 6.12.85-1	6.12.85-1
Debian:14	linux	before 6.18.14-1	6.18.14-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

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CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
89Now
CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
85Now

Published before and after this one in the same product

← EarlierCVE-2026-45939May 27, 2026 · gpib: Fix memory leak in ni_usb_init()
22Monitor
← EarlierCVE-2026-45941May 27, 2026 · tpm: tpm_i2c_infineon: Fix locality leak on get_burstcount() failure
22Monitor
Later →CVE-2026-45947May 27, 2026 · drm/amdgpu: Fix memory leak in amdgpu_acpi_enumerate_xcc()
22Monitor

Remediation

Which version to upgrade to

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

Product / package	Fixed version	Source
Linux Linux	43cbb78ee047b9b12d096d40e3be265969d4c1f8	Vendor (CNA)
Linux Linux	46dbda27b028d78087667e8280966b99cec015ca	Vendor (CNA)
Linux Linux	5.14	Vendor (CNA)
Linux Linux	551672981fe227122258a25a385a05f5c0746ad6	Vendor (CNA)
Linux Linux	709db4b476e254579d9c48ec34d397a41ca0c407	Vendor (CNA)
Linux Linux	847eeb6c0efcd76c7def73857cf798a4fcd8f79b	Vendor (CNA)
Linux Linux	c4af8a98bb52825a5331ae1d0604c0ea6956ba4b	Vendor (CNA)
Linux Linux	f50433f2603def08b21a4bf2fd238687fb5cbde9	Vendor (CNA)
debian:linux	6.1.170-1 · Debian:12	Package registry (OSV)

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.

No history yet (it accumulates with the daily EPSS job).

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).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

TR-26-0290 · Jun 2, 2026(Linux Kernel Güvenlik Bildirimi)

All national notices →

Technical details

Attack conditions

Someone with local access to the system can trigger it.
A low-privileged account is enough.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality: high · data can be read
Integrity: high · data or configuration can be modified
Availability: high · the service can be disrupted

Attack vector: Local
Attack complexity: Low
Privileges required: Low
User interaction: None
Scope: Unchanged
Confidentiality impact: High
Integrity impact: High
Availability impact: High

Weakness class (CWE)

CWE-416 · Use After Free

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

nvd-primary

Root cause

After a memory region is freed, another reference pointing to it is still used. By then, the same region may have been allocated for different data.

The bug in code

The whole CWE-416 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1free(dev->buf);
2/* ... another thread is still running ... */
3process(dev->buf);

Fixed

1lock(&dev->lock);
2free(dev->buf);
3dev->buf = NULL;
4unlock(&dev->lock);

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

Fix✗ → ✓Sep 28, 2026, 10:09 PM UTC

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

References

git.kernel.org/stable/c/43cbb78ee047b9b12d096d40e3be265969d4c1f8

Show all references (6 more)

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

All records