Loop with Unreachable Exit Condition ('Infinite Loop') Affecting kernel-debug package, versions *


Severity

Recommended
0.0
medium
0
10

Based on CentOS security rating.

Threat Intelligence

EPSS
0.07% (23rd percentile)

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  • Snyk IDSNYK-CENTOS6-KERNELDEBUG-16292216
  • published25 Apr 2026
  • disclosed24 Apr 2026

Introduced: 24 Apr 2026

CVE-2026-31552  (opens in a new tab)
CWE-835  (opens in a new tab)

How to fix?

There is no fixed version for Centos:6 kernel-debug.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-debug package and not the kernel-debug package as distributed by Centos. See How to fix? for Centos:6 relevant fixed versions and status.

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 Base Scores

version 3.1