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Vulnerabilities

Vulnerability · CVE-2026-23138

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

Published Feb 14, 2026 · catalog updated Oct 30, 2026 · Linux Linux

Last checked Nov 8, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-23138. EPSS is 0.14%. Act only if a listed version of Linux Linux is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
None0.0
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.14%
Remediation
Version ranges on file
Affected products
vendor Linux Linux 5f5fa7ea89dc82d34ed458f4d7a8634e8e9eefce <9b03768037d91ce727effb1c5d92d2c7781bf692

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 re

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Linux Linux 5f5fa7ea89dc82d34ed458f4d7a8634e8e9eefce <9b03768037d91ce727effb1c5d92d2c7781bf6925f5fa7ea89dc82d34ed458f4d7a8634e8e9eefce <9b03768037d91ce727effb1c5d92d2c7781bf692

How to fix CVE-2026-23138

  • Upgrade

    CVE-2026-23138 lists a fix boundary at 9b03768037d91ce727effb1c5d92d2c7781bf692. Compare the installed build with that boundary before you change production.

  • Version check

    Seen in 5f5fa7ea89dc82d34ed458f4d7a8634e8e9eefce <9b03768037d91ce727effb1c5d92d2c7781bf692

  • Advisory

    Open the cve_org record and follow its fix.

  • Official advisories

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-23138. EPSS is 0.14%. Act only if a listed version of Linux Linux is installed.

Which versions are affected?

Compare what you have installed with Linux Linux 5f5fa7ea89dc82d34ed458f4d7a8634e8e9eefce <9b03768037d91ce727effb1c5d92d2c7781bf692 5f5fa7ea89dc82d34ed458f4d7a8634e8e9eefce <9b03768037d91ce727effb1c5d92d2c7781bf692. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.14%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Feb 14, 2026 · EUVD

    Detected

    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 bit

  2. Oct 30, 2026 · EUVD

    Updated

    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 bit

Sources

  • CVE.orgVulnerability recordCVE-2026-23138

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-23138

    30-day exploitation probability 0.14%

    first.org
  • EUVDVulnerability recordEUVD-2026-5899

    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

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Nov 8, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 8, 2026
  • CVE.orgNov 4, 2026
  • EUVDNov 2, 2026