🛡️ CVE-2026-31550 — kernel

🟡 CVSS 5.5 — Medium ✅ No Known Exploit NVD
5.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

pmdomain: bcm: bcm2835-power: Increase ASB control timeout

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

pmdomain: bcm: bcm2835-power: Increase ASB control timeout

The bcm2835_asb_control() function uses a tight polling loop to wait

for the ASB bridge to acknowledge a request. During intensive workloads,

this handshake intermittently fails for V3D's master ASB on BCM2711,

resulting in "Failed to disable ASB master for v3d" errors during

runtime PM suspend. As a consequence, the failed power-off leaves V3D in

a broken state, leading to bus faults or system hangs on later accesses.

As the timeout is insufficient in some scenarios, increase the polling

timeout from 1us to 5us, which is still negligible in the context of a

power domain transition. Also, replace the open-coded ktime_get_ns()/

cpu_relax() polling loop with readl_poll_timeout_atomic().

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability high.

Affected software

CVE-2026-31550 is recorded against 2 packages.

  • kernel (from 6.19.0 up to 6.19.10)
  • linux-kernel

Timeline and source

Published on 24 April 2026 and last revised on 15 July 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
github.com (Advisory)
nvd.nist.gov (Advisory)
git.kernel.org (Package)

CVE-2026-31550 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity Medium
CVSS Score 5.5
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE N/A
Public Exploit ✅ No
Source NVD
Published 2026-04-24
Updated 2026-08-12
Modified 2026-07-15

Affected Packages

Software From version Fixed in
kernel 6.19.0 6.19.10
linux-kernel — —

References

Similar Threats

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