CVE-2026-46041

MEDIUM EPSS 2.3%
Published May 27, 20261mo ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
Find Similar
Published May 27, 2026 1mo ago
Last Modified Jun 17, 2026 2w ago

Description

In the Linux kernel, the following vulnerability has been resolved: greybus: gb-beagleplay: fix sleep in atomic context in hdlc_tx_frames() hdlc_append() calls usleep_range() to wait for circular buffer space, but it is called with tx_producer_lock (a spinlock) held via hdlc_tx_frames() -> hdlc_append_tx_frame()/hdlc_append_tx_u8()/etc. Sleeping while holding a spinlock is illegal and can trigger "BUG: scheduling while atomic". Fix this by moving the buffer-space wait out of hdlc_append() and into hdlc_tx_frames(), before the spinlock is acquired. The new flow: 1. Pre-calculate the worst-case encoded frame length. 2. Wait (with sleep) outside the lock until enough space is available, kicking the TX consumer work to drain the buffer. 3. Acquire the spinlock, re-verify space, and write the entire frame atomically. This ensures that sleeping only happens without any lock held, and that frames are either fully enqueued or not written at all. This bug is found by CodeQL static analysis tool (interprocedural sleep-in-atomic query) and my code review.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
2.3% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Affected Products 3

VendorProductVersionRange
linuxlinux_kernel*≥6.7  –  <6.12.86
linuxlinux_kernel*≥6.13  –  <6.18.27
linuxlinux_kernel*≥6.19  –  <7.0.4

References 4

  • git.kernel.org https://git.kernel.org/stable/c/51667fe2d9294d66e0228b9f51d1f01b6680a641
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6b526dca0966f2370835765019a54319b78fca8d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/9f2b87bcdfed55145acbf932dc12f2c057145cad
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b2801647c203a38e013802e9e9616b5bfac64968
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/51667fe2d9294d66e0228b9f51d1f01b6680a641
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6b526dca0966f2370835765019a54319b78fca8d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/9f2b87bcdfed55145acbf932dc12f2c057145cad
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b2801647c203a38e013802e9e9616b5bfac64968
    Patch