CVE-2026-90431 - Vulnerability Details

- remoteproc: Prevent crash handling to race with rproc_del()

Description

In the Linux kernel, the following vulnerability has been resolved:

remoteproc: Prevent crash handling to race with rproc_del()

There's no synchronization between rproc_crash_handler_work() and
rproc_del(), as such it's possible for a driver to be removed while
crash-handler work is scheduled, or even executing - resulting in
use-after-free issues.

To avoid this the scheduled work need to be cancelled and synchronized
against before the removal proceeds.

In order to ensure that this doesn't race with the reporting, and
thereby scheduling new work, a "deleting" flag is introduced. This is
similar to the RPROC_DELETE state that was introduced to ensure that
"start" didn't race with rproc_del(), but the existing mechanism can not
be used as it's valid to call rproc_report_crash() in atomic context -
and the "state" is protected by a mutex.

In the event that work is cancelled the pm_stay_awake() is left
unbalanced and need to be unrolled.

The blocking and cancelling of crash-handler work prior to the actual
rproc_shutdown() call does have the explicit side-effect that crashes
resulting from the shutdown process will not enter the crash-handling
path, and as such will not generate devcoredumps etc. Due to the
existing mutual exclusion between these code paths there's no concrete
reduction in functionality, but further work would be needed to handle
this case.

Published: 2026-09-17

Score: n/a

EPSS: < 1% Very Low

KEV: No

Impact:

Action:

Analysis

Impact

The remoteproc subsystem in the Linux kernel lacks proper synchronization between crash‑handler work and driver removal. This allows a driver to be freed while crash‑handler work is still scheduled or executing, resulting in a use‑after‑free condition that can corrupt kernel memory and provide an opportunity for a local attacker to execute arbitrary code with kernel privileges.

Affected Systems

All Linux kernel releases that compile and run the remoteproc subsystem and have not yet incorporated the patch that introduces a deleting flag to cancel pending crash‑handler work. Because no specific version numbers are provided, any kernel containing the vulnerable code before the fix is considered at risk.

Risk and Exploitability

The EPSS score indicates a very low probability of exploitation (<1%) and the vulnerability is not listed in CISA’s KEV catalog, implying no public exploits are known. However, the flaw can lead to kernel privilege escalation if an attacker can trigger the use‑after‑free, which would typically require local kernel access or the ability to initiate driver removal. Consequently, the overall risk is moderate for systems that load vulnerable remoteproc drivers without the patch.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Linux

unaffected

Version	Status	Constraints
`8afd519c3470f685f964deebd61aa51d83cde90a`	affected	< 50f232c26298923d39a48dc8e03d1732e5a5dcf1
`8afd519c3470f685f964deebd61aa51d83cde90a`	affected	< 69af36f1fb7d24d287662fef6b2093bcf847a9db
`8afd519c3470f685f964deebd61aa51d83cde90a`	affected	< a8a62cb4d2f3fd6aa06e86f1711c62d2a4cf17d5
`8afd519c3470f685f964deebd61aa51d83cde90a`	affected	< 47de033918cd772146f7438aa04471c020b2dedc
`8afd519c3470f685f964deebd61aa51d83cde90a`	affected	< a31d9562eeec5c4103c202fc87651f6e7d3d0035
`8afd519c3470f685f964deebd61aa51d83cde90a`	affected	< f15cde11298402f803d5dda9cb9f95eea3d2ca40
`8afd519c3470f685f964deebd61aa51d83cde90a`	affected	< 61862ed651b2493573e6d2192d5640bc6616f5d0
`8afd519c3470f685f964deebd61aa51d83cde90a`	affected	< 74ee3b2f5767447c57959994341e5b95f1079977

Linux

affected

Version	Status	Constraints
`3.7`	affected	—
`0`	unaffected	< 3.7
`5.10.270`	unaffected	≤ 5.10.*
`5.15.221`	unaffected	≤ 5.15.*
`6.1.188`	unaffected	≤ 6.1.*
`6.6.157`	unaffected	≤ 6.6.*
`6.12.110`	unaffected	≤ 6.12.*
`6.18.52`	unaffected	≤ 6.18.*
`7.2.6`	unaffected	≤ 7.2.*
`7.3-rc1`	unaffected	≤ *

No data.

Vendor Product Confidence Versions

Linux

Linux Kernel

99%

Version	Status	Scheme	Platform
`[8afd519c3470f685f964deebd61aa51d83cde90a,50f232c26298923d39a48dc8e03d1732e5a5dcf1)`	affected	code_commit	—
`[8afd519c3470f685f964deebd61aa51d83cde90a,69af36f1fb7d24d287662fef6b2093bcf847a9db)`	affected	code_commit	—
`[8afd519c3470f685f964deebd61aa51d83cde90a,a8a62cb4d2f3fd6aa06e86f1711c62d2a4cf17d5)`	affected	code_commit	—
`[8afd519c3470f685f964deebd61aa51d83cde90a,47de033918cd772146f7438aa04471c020b2dedc)`	affected	code_commit	—
`[8afd519c3470f685f964deebd61aa51d83cde90a,a31d9562eeec5c4103c202fc87651f6e7d3d0035)`	affected	code_commit	—
`[8afd519c3470f685f964deebd61aa51d83cde90a,f15cde11298402f803d5dda9cb9f95eea3d2ca40)`	affected	code_commit	—
`[8afd519c3470f685f964deebd61aa51d83cde90a,61862ed651b2493573e6d2192d5640bc6616f5d0)`	affected	code_commit	—
`[8afd519c3470f685f964deebd61aa51d83cde90a,74ee3b2f5767447c57959994341e5b95f1079977)`	affected	code_commit	—

Linux

Linux Kernel

99%

Version	Status	Scheme	Platform
`3.7`	affected	generic	—
`[0,3.7)`	unaffected	generic	—
`[5.10.270,5.11.0)`	unaffected	semver	—
`[5.15.221,5.16.0)`	unaffected	semver	—
`[6.1.188,6.2.0)`	unaffected	semver	—
`[6.6.157,6.7.0)`	unaffected	semver	—
`[6.12.110,6.13.0)`	unaffected	semver	—
`[6.18.52,6.19.0)`	unaffected	semver	—
`[7.2.6,7.3.0)`	unaffected	semver	—
`[7.3-rc1,*]`	unaffected	generic	—

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Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

Apply the latest kernel patch that adds a deleting flag and cancels crash‑handler work prior to driver removal.
Reboot the system to ensure the updated kernel is active.
If the patch cannot be applied immediately, disable or unload nonessential remoteproc drivers until the patch is installed.

Generated by OpenCVE AI on September 19, 2026 at 13:43 UTC.

Tracking

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Advisories

Source	ID	Title
Debian DLA	DLA-4817-1	linux-6.12 security update
Debian DSA	DSA-6528-1	linux security update

No CVSS v4.0

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.0022.

Key SSVC decision points have not yet been added.

References

Link	Providers
https://git.kernel.org/stable/c/47de033918cd772146f7438aa04471c020b2dedc
https://git.kernel.org/stable/c/50f232c26298923d39a48dc8e03d1732e5a5dcf1
https://git.kernel.org/stable/c/61862ed651b2493573e6d2192d5640bc6616f5d0
https://git.kernel.org/stable/c/69af36f1fb7d24d287662fef6b2093bcf847a9db
https://git.kernel.org/stable/c/74ee3b2f5767447c57959994341e5b95f1079977
https://git.kernel.org/stable/c/a31d9562eeec5c4103c202fc87651f6e7d3d0035
https://git.kernel.org/stable/c/a8a62cb4d2f3fd6aa06e86f1711c62d2a4cf17d5
https://git.kernel.org/stable/c/f15cde11298402f803d5dda9cb9f95eea3d2ca40

History

Sat, 19 Sep 2026 14:00:00 +0000

Type	Values Removed	Values Added
Weaknesses		CWE-362 CWE-416

Thu, 17 Sep 2026 16:30:00 +0000

Type	Values Removed	Values Added
Description		In the Linux kernel, the following vulnerability has been resolved: remoteproc: Prevent crash handling to race with rproc_del() There's no synchronization between rproc_crash_handler_work() and rproc_del(), as such it's possible for a driver to be removed while crash-handler work is scheduled, or even executing - resulting in use-after-free issues. To avoid this the scheduled work need to be cancelled and synchronized against before the removal proceeds. In order to ensure that this doesn't race with the reporting, and thereby scheduling new work, a "deleting" flag is introduced. This is similar to the RPROC_DELETE state that was introduced to ensure that "start" didn't race with rproc_del(), but the existing mechanism can not be used as it's valid to call rproc_report_crash() in atomic context - and the "state" is protected by a mutex. In the event that work is cancelled the pm_stay_awake() is left unbalanced and need to be unrolled. The blocking and cancelling of crash-handler work prior to the actual rproc_shutdown() call does have the explicit side-effect that crashes resulting from the shutdown process will not enter the crash-handling path, and as such will not generate devcoredumps etc. Due to the existing mutual exclusion between these code paths there's no concrete reduction in functionality, but further work would be needed to handle this case.
Title		remoteproc: Prevent crash handling to race with rproc_del()
First Time appeared		Linux Linux linux Kernel
CPEs		cpe:2.3:o:linux:linux_kernel::::::::
Vendors & Products		Linux Linux linux Kernel
References		https://git.kernel.org/stable/c/47de033918cd772146f7438aa04471c020b2dedc https://git.kernel.org/stable/c/50f232c26298923d39a48dc8e03d1732e5a5dcf1 https://git.kernel.org/stable/c/61862ed651b2493573e6d2192d5640bc6616f5d0 https://git.kernel.org/stable/c/69af36f1fb7d24d287662fef6b2093bcf847a9db https://git.kernel.org/stable/c/74ee3b2f5767447c57959994341e5b95f1079977 https://git.kernel.org/stable/c/a31d9562eeec5c4103c202fc87651f6e7d3d0035 https://git.kernel.org/stable/c/a8a62cb4d2f3fd6aa06e86f1711c62d2a4cf17d5 https://git.kernel.org/stable/c/f15cde11298402f803d5dda9cb9f95eea3d2ca40

Subscriptions

Linux Linux Kernel

MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2026-09-17T16:09:51.759Z

Updated: 2026-09-17T16:09:51.759Z

Reserved: 2026-09-11T19:38:34.815Z

Link: CVE-2026-90431

Vulnrichment

No data.

NVD

Status : Received

Published: 2026-09-17T17:17:48.110

Modified: 2026-09-17T17:17:48.110

Link: CVE-2026-90431

Redhat

No data.

OpenCVE Enrichment

Updated: 2026-09-19T13:45:15Z

Weaknesses

CWE-362
Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CWE-416
Use After Free

Impact

Affected Systems

Risk and Exploitability

Tracking

Subscriptions

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