cbcvebase.
CVE-2026-23138
published 2026-02-14

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…

PriorityP421medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.12%
2.3th percentile
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

40 ranges· showing 25
VendorProductVersion rangeFixed in
debianlinux< linux 6.18.8-1 (forky)linux 6.18.8-1 (forky)
linuxlinux
linuxlinux>= 5f5fa7ea89dc82d34ed458f4d7a8634e8e9eefce < 9b03768037d91ce727effb1c5d92d2c7781bf6929b03768037d91ce727effb1c5d92d2c7781bf692
linuxlinux>= 5f5fa7ea89dc82d34ed458f4d7a8634e8e9eefce < 19e18e6dabb1bbba76d2809ca7d8ae9e1f5975fe19e18e6dabb1bbba76d2809ca7d8ae9e1f5975fe
linuxlinux>= 5f5fa7ea89dc82d34ed458f4d7a8634e8e9eefce < 5b7f91acffd2c4c000971553d22efa1e1bb4feae5b7f91acffd2c4c000971553d22efa1e1bb4feae
linuxlinux>= 5f5fa7ea89dc82d34ed458f4d7a8634e8e9eefce < 5f1ef0dfcb5b7f4a91a9b0e0ba533efd9f7e2cdb5f1ef0dfcb5b7f4a91a9b0e0ba533efd9f7e2cdb
linuxlinux_kernel
linuxlinux_kernel>= 0 < 6.18.8-16.18.8-1
linuxlinux_kernel>= 5.8 < 6.18.66.18.6
msrccbl2_kernel_5.15.200.1-1_on_cbl_mariner_2.0
msrccbl2_kernel_5.15.202.1-1_on_cbl_mariner_2.0
ubuntulinux
ubuntulinux-aws
ubuntulinux-azure
ubuntulinux-azure-6.17
ubuntulinux-azure-6.8
ubuntulinux-azure-fde
ubuntulinux-azure-fde-6.17
ubuntulinux-azure-fde-6.8
ubuntulinux-azure-fips
ubuntulinux-fips
ubuntulinux-gcp
ubuntulinux-gcp-6.17
ubuntulinux-gcp-6.8
ubuntulinux-gcp-fips

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv5.5MEDIUM
vendor_debian5.5MEDIUM
vendor_msrc5.5MEDIUM
vendor_redhat5.5MEDIUM
vendor_ubuntu2.0LOW
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