CVE-2026-23138

MEDIUM

MEDIUM Priority: 0.01 BB Relevance: 36/100

Published: 2026-02-14 Modified: 2026-10-30 First seen: 2026-10-30 Status: active

Attack Surface

Low Complexity No Interaction

CVSS Vector Breakdown

AV: Local

AC: Low

PR: Low

UI: None

S: Unchanged

C: None

I: None

A: High

Description

In the Linux kernel, the following vulnerability has been resolved: tracing: Add recursion protection in kernel stack trace recording A bug was reported about an infinite recursion caused by tracing the rcu events with the kernel stack trace trigger enabled. The stack trace code called back into RCU which then called the stack trace again. Expand the ftrace recursion protection to add a set of bits to protect events from recursion. Each bit represents the context that the event is in (normal, softirq, interrupt and NMI). Have the stack trace code use the interrupt context to protect against recursion. Note, the bug showed an issue in both the RCU code as well as the tracing stacktrace code. This only handles the tracing stack trace side of the bug. The RCU fix will be handled separately.

Affected Software (11)

Vendor	Product	Version
Linux	Linux	5f5fa7ea89dc82d34ed458f4d7a8634e8e9eefce < 80fe242a6239778025ba3be8e7263e3d69c37947
Linux	Linux	5f5fa7ea89dc82d34ed458f4d7a8634e8e9eefce < 9b03768037d91ce727effb1c5d92d2c7781bf692
Linux	Linux	5f5fa7ea89dc82d34ed458f4d7a8634e8e9eefce < 19e18e6dabb1bbba76d2809ca7d8ae9e1f5975fe
Linux	Linux	5f5fa7ea89dc82d34ed458f4d7a8634e8e9eefce < 5b7f91acffd2c4c000971553d22efa1e1bb4feae
Linux	Linux	5f5fa7ea89dc82d34ed458f4d7a8634e8e9eefce < 5f1ef0dfcb5b7f4a91a9b0e0ba533efd9f7e2cdb
Linux	Linux	5.8
linux	linux_kernel	5.8 – 6.18.6
linux	linux_kernel	6.19
linux	linux_kernel	6.19
linux	linux_kernel	6.19
linux	linux_kernel	6.19