VulnerabilityPublished 22 Apr 2026Updated 5 Nov 2026

CVE-2026-31440: Linux kernel · dmaengine: idxd: Fix leaking event log memory

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in facd0012708e942fc12890708738aebde497564e : update Linux kernel when convenient.

Data as of 5 Nov 2026, 22:04 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, 2026-11-05.

Patch

Available – fixed in facd0012708e942fc12890708738aebde497564e, ee66bc29578391c9b48523dc9119af67bd5c7c0f, d94f9b0ba28a205caf95902ee88b42bdb8af83d0 +2

Exploitation evidence

Disclosed: evidence found.
CVE published 22 Apr 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 5 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 to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 244da66cda359227d80ccb41dbcb99da40eae186, < facd0012708e942fc12890708738aebde497564e	Fixed in facd0012708e942fc12890708738aebde497564e
LinuxLinux	Affected ≥ 244da66cda359227d80ccb41dbcb99da40eae186, < ee66bc29578391c9b48523dc9119af67bd5c7c0f	Fixed in ee66bc29578391c9b48523dc9119af67bd5c7c0f
LinuxLinux	Affected ≥ 244da66cda359227d80ccb41dbcb99da40eae186, < d94f9b0ba28a205caf95902ee88b42bdb8af83d0	Fixed in d94f9b0ba28a205caf95902ee88b42bdb8af83d0
LinuxLinux	Affected ≥ 244da66cda359227d80ccb41dbcb99da40eae186, < 695b491dc3f20365fd5821f22e25dbe3c1c20cbc	Fixed in 695b491dc3f20365fd5821f22e25dbe3c1c20cbc
LinuxLinux	Affected ≥ 244da66cda359227d80ccb41dbcb99da40eae186, < 9dfa00967e6ef43a9dd0887fe5c3a721a39da92e	Fixed in 9dfa00967e6ef43a9dd0887fe5c3a721a39da92e
LinuxLinux	Affected =6.4	Fixed in–

Description

In the Linux kernel, the following vulnerability has been resolved: dmaengine: idxd: Fix leaking event log memory During the device remove process, the device is reset, causing the configuration registers to go back to their default state, which is zero. As the driver is checking if the event log support was enabled before deallocating, it will fail if a reset happened before. Do not check if the support was enabled, the check for 'idxd->evl' being valid (only allocated if the HW capability is available) is enough.

References

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