CVE-2026-31552

HIGH EPSS 39.1%
Published Apr 24, 20262mo ago · Modified Jun 17, 20262w ago
7.5 CVSS 3.1
High
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Published Apr 24, 2026 2mo ago
Last Modified Jun 17, 2026 2w ago

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: wlcore: Return -ENOMEM instead of -EAGAIN if there is not enough headroom Since upstream commit e75665dd0968 ("wifi: wlcore: ensure skb headroom before skb_push"), wl1271_tx_allocate() and with it wl1271_prepare_tx_frame() returns -EAGAIN if pskb_expand_head() fails. However, in wlcore_tx_work_locked(), a return value of -EAGAIN from wl1271_prepare_tx_frame() is interpreted as the aggregation buffer being full. This causes the code to flush the buffer, put the skb back at the head of the queue, and immediately retry the same skb in a tight while loop. Because wlcore_tx_work_locked() holds wl->mutex, and the retry happens immediately with GFP_ATOMIC, this will result in an infinite loop and a CPU soft lockup. Return -ENOMEM instead so the packet is dropped and the loop terminates. The problem was found by an experimental code review agent based on gemini-3.1-pro while reviewing backports into v6.18.y.

CVSS Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
39.1% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-835

Affected Products 15

VendorProductVersionRange
linuxlinux_kernel*≥5.10.250  –  <5.10.253
linuxlinux_kernel*≥5.15.200  –  <5.15.203
linuxlinux_kernel*≥6.1.163  –  <6.1.167
linuxlinux_kernel*≥6.6.124  –  <6.6.130
linuxlinux_kernel*≥6.12.70  –  <6.12.78
linuxlinux_kernel*≥6.18.10  –  <6.18.20
linuxlinux_kernel*≥6.19.1  –  <6.19.10
linuxlinux_kernel6.19any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any

References 8

  • git.kernel.org https://git.kernel.org/stable/c/12f9eef39e49716c763714bfda835a733d5f6dea
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/46c670ff1ff466e5eccb3940f726586473dc053c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/980f793645540ca7a6318165cc12f49d5febeb99
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a6dc74209462c4fe5a88718d2f3a5286886081c8
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ceb46b40b021d21911ff8608ce4ed33c1264ad2f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/cfa64e2b3717be1da7c4c1aff7268a009e8c1610
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/deb353d9bb009638b7762cae2d0b6e8fdbb41a69
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f2c06d718a7b85cbc59ceaa2ff3f46b178ac709c
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/12f9eef39e49716c763714bfda835a733d5f6dea
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/46c670ff1ff466e5eccb3940f726586473dc053c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/980f793645540ca7a6318165cc12f49d5febeb99
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a6dc74209462c4fe5a88718d2f3a5286886081c8
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ceb46b40b021d21911ff8608ce4ed33c1264ad2f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/cfa64e2b3717be1da7c4c1aff7268a009e8c1610
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/deb353d9bb009638b7762cae2d0b6e8fdbb41a69
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f2c06d718a7b85cbc59ceaa2ff3f46b178ac709c
    Patch