CVE-2026-31550
What it is
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().
At a glance
- Exploitability
- Can be exploited locally on the machine with a low-privilege account. High risk of service disruption.
- Exploit odds
- 0.1% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 0.1% in the next 30 days (EPSS).
- Severity: 5.5 MEDIUM (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 0.1% · EPSS, next 30 days
- Record status
- Analyzed
Affected
- Linux Kernel < 5.10.253
- Linux Kernel < 5.15.203
- Linux Kernel < 6.1.167
- Linux Kernel < 6.6.130
- Linux Kernel < 6.12.78
- Linux Kernel < 6.18.20
- Linux Kernel < 6.19.10
- Linux Kernel 5.1
Attack profile CVSS 3.1 · 5.5
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Raw vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2026-31550.md and follow it. Check whether this project is affected by CVE-2026-31550. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- https://git.kernel.org/stable/c/0e84e74849d2d7e9b23a09c2d5e0d9357db1ca59
- https://git.kernel.org/stable/c/18605b1b936b66b1f34dcf8e9ad4f1fbcf7a7c13
- https://git.kernel.org/stable/c/572f17180f26619809b8e0593d926762aa8660ff
- https://git.kernel.org/stable/c/622ab02e955c35c125ff2b65d8327b2c52db8758
- https://git.kernel.org/stable/c/9443202d91388026dbf7312972a74fbfd27ee82f
- https://git.kernel.org/stable/c/b826d2c0b0ecb844c84431ba6b502e744f5d919a
- https://git.kernel.org/stable/c/c5e734f6a0740dce92e7c919e632cb43fa5d4e53
- https://git.kernel.org/stable/c/ea4fa54b83bb2e4a21e9026824bfe271b1a6ee1e
References
- https://git.kernel.org/stable/c/0e84e74849d2d7e9b23a09c2d5e0d9357db1ca59
- https://git.kernel.org/stable/c/18605b1b936b66b1f34dcf8e9ad4f1fbcf7a7c13
- https://git.kernel.org/stable/c/572f17180f26619809b8e0593d926762aa8660ff
- https://git.kernel.org/stable/c/622ab02e955c35c125ff2b65d8327b2c52db8758
- https://git.kernel.org/stable/c/9443202d91388026dbf7312972a74fbfd27ee82f
- https://git.kernel.org/stable/c/b826d2c0b0ecb844c84431ba6b502e744f5d919a
- https://git.kernel.org/stable/c/c5e734f6a0740dce92e7c919e632cb43fa5d4e53
- https://git.kernel.org/stable/c/ea4fa54b83bb2e4a21e9026824bfe271b1a6ee1e