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Race Condition The advisory has been revoked - it doesn't affect any version of package kernel-rt-kvm  (opens in a new tab)

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EPSS
0.13% (3rd percentile)

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  • Snyk IDSNYK-CENTOS10-KERNELRTKVM-16178342
  • published24 Apr 2026
  • disclosed22 Apr 2026
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Introduced: 22 Apr 2026

CVE-2026-31474  (opens in a new tab)
CWE-364  (opens in a new tab)

Amendment

The Centos security team deemed this advisory irrelevant for Centos:10.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-rt-kvm package and not the kernel-rt-kvm package as distributed by Centos.

In the Linux kernel, the following vulnerability has been resolved:

can: isotp: fix tx.buf use-after-free in isotp_sendmsg()

isotp_sendmsg() uses only cmpxchg() on so->tx.state to serialize access to so->tx.buf. isotp_release() waits for ISOTP_IDLE via wait_event_interruptible() and then calls kfree(so->tx.buf).

If a signal interrupts the wait_event_interruptible() inside close() while tx.state is ISOTP_SENDING, the loop exits early and release proceeds to force ISOTP_SHUTDOWN and continues to kfree(so->tx.buf) while sendmsg may still be reading so->tx.buf for the final CAN frame in isotp_fill_dataframe().

The so->tx.buf can be allocated once when the standard tx.buf length needs to be extended. Move the kfree() of this potentially extended tx.buf to sk_destruct time when either isotp_sendmsg() and isotp_release() are done.