CVE-2026-23138 (GCVE-0-2026-23138)

Vulnerability from cvelistv5 – Published: 2026-02-14 15:22 – Updated: 2026-10-30 12:23
VLAI
Title
tracing: Add recursion protection in kernel stack trace recording
Summary
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.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7018 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 5f5fa7ea89dc82d34ed458f4d7a8634e8e9eefce , < 80fe242a6239778025ba3be8e7263e3d69c37947 (git)
Affected: 5f5fa7ea89dc82d34ed458f4d7a8634e8e9eefce , < 9b03768037d91ce727effb1c5d92d2c7781bf692 (git)
Affected: 5f5fa7ea89dc82d34ed458f4d7a8634e8e9eefce , < 19e18e6dabb1bbba76d2809ca7d8ae9e1f5975fe (git)
Affected: 5f5fa7ea89dc82d34ed458f4d7a8634e8e9eefce , < 5b7f91acffd2c4c000971553d22efa1e1bb4feae (git)
Affected: 5f5fa7ea89dc82d34ed458f4d7a8634e8e9eefce , < 5f1ef0dfcb5b7f4a91a9b0e0ba533efd9f7e2cdb (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.8
Unaffected: 0 , < 5.8 (semver)
Unaffected: 6.1.191 , ≤ 6.1.* (semver)
Unaffected: 6.6.130 , ≤ 6.6.* (semver)
Unaffected: 6.12.78 , ≤ 6.12.* (semver)
Unaffected: 6.18.6 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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}



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