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VulnerabilityPublished Updated

CVE-2026-23287: Linux kernel · irqchip/sifive-plic: Fix frozen interrupt due to affinity setting

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in f611791a927141d05d7030607dea6372311c1413 : update Linux kernel when convenient.

Data as of 10 Nov 2026, 13:02 UTC

Severity
Medium

Rated Medium by Threat Radar's AI analysis · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none
Patch
Available – fixed in f611791a927141d05d7030607dea6372311c1413, 1072020685f4b81f6efad3b412cdae0bd62bb043, 1883332bf21feb8871af09daf604fc4836a76925 +3

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 25 Mar 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 10 Nov 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • ≥ cc9f04f9a84f745949e325661550ed14bd0ff322, < f611791a927141d05d7030607dea6372311c1413
Fixed in
  • f611791a927141d05d7030607dea6372311c1413
LinuxLinuxAffected
  • ≥ cc9f04f9a84f745949e325661550ed14bd0ff322, < 1072020685f4b81f6efad3b412cdae0bd62bb043
Fixed in
  • 1072020685f4b81f6efad3b412cdae0bd62bb043
LinuxLinuxAffected
  • ≥ cc9f04f9a84f745949e325661550ed14bd0ff322, < 1883332bf21feb8871af09daf604fc4836a76925
Fixed in
  • 1883332bf21feb8871af09daf604fc4836a76925
LinuxLinuxAffected
  • ≥ cc9f04f9a84f745949e325661550ed14bd0ff322, < 8942fb1a5bc2dcbd88f7e656d109d42f778f298f
Fixed in
  • 8942fb1a5bc2dcbd88f7e656d109d42f778f298f
LinuxLinuxAffected
  • ≥ cc9f04f9a84f745949e325661550ed14bd0ff322, < 686eb378a4a51aa967e08337dd59daade16aec0f
Fixed in
  • 686eb378a4a51aa967e08337dd59daade16aec0f
LinuxLinuxAffected
  • ≥ cc9f04f9a84f745949e325661550ed14bd0ff322, < 2edbd173309165d103be6c73bd83e459dc45ae7b
Fixed in
  • 2edbd173309165d103be6c73bd83e459dc45ae7b

AI-suggested

A fix is available and has been applied in the Linux kernel commits identified by the fixedVersions hashes. Users should update to a Linux kernel version that includes these fixes to resolve the frozen interrupt issue caused by affinity setting changes.

Description

A vulnerability in the Linux kernel's irqchip/sifive-plic component caused interrupts to freeze when the interrupt affinity setting was changed during handling. The issue arose because the PLIC hardware ignored completion messages for disabled interrupts, leading to a frozen UART port under certain conditions. The problem was fixed by changing the check to verify the PLIC's enable bit before sending the completion message.

References

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