VulnerabilityPublished 8 Jun 2026Updated 6 Nov 2026

CVE-2026-46298: Linux kernel · pseries/papr-hvpipe: Fix race with interrupt handler

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in b33d6f5da16e0eec95b933342812c689cdfcec03 : update Linux kernel when convenient.

Data as of 6 Nov 2026, 16:49 UTC

Severity

Unrated

Rated by Threat Radar · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none

Exploitation: No evidence of active exploitation and no public proof of concept
Automatable: Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact: Limited control over the software or limited information exposure

CISA SSVC assessment, 2026-11-06.

Patch

Available – fixed in b33d6f5da16e0eec95b933342812c689cdfcec03, 342c966f81cfc3cb6c297e80b37a9f3a5d637d2c, 7a4f0846ee6cc8cf44ae0046ed42e3259d1dd45b

Exploitation evidence

Disclosed: evidence found.
CVE published 8 Jun 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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 6 Nov 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade Linux kernel to b33d6f5da16e0eec95b933342812c689cdfcec03, 342c966f81cfc3cb6c297e80b37a9f3a5d637d2c or 7a4f0846ee6cc8cf44ae0046ed42e3259d1dd45b.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 814ef095f12c9fa142043ee689500f3a41bb6dab, < b33d6f5da16e0eec95b933342812c689cdfcec03	Fixed in b33d6f5da16e0eec95b933342812c689cdfcec03
LinuxLinux	Affected ≥ 814ef095f12c9fa142043ee689500f3a41bb6dab, < 342c966f81cfc3cb6c297e80b37a9f3a5d637d2c	Fixed in 342c966f81cfc3cb6c297e80b37a9f3a5d637d2c
LinuxLinux	Affected ≥ 814ef095f12c9fa142043ee689500f3a41bb6dab, < 7a4f0846ee6cc8cf44ae0046ed42e3259d1dd45b	Fixed in 7a4f0846ee6cc8cf44ae0046ed42e3259d1dd45b
LinuxLinux	Affected =6.18	Fixed in–

Description

In the Linux kernel, the following vulnerability has been resolved: pseries/papr-hvpipe: Fix race with interrupt handler While executing ->ioctl handler or ->release handler, if an interrupt fires on the same cpu, then we can enter into a deadlock. This patch fixes both these handlers to take spin_lock_irq{save|restore} versions of the lock to prevent this deadlock.

References

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