What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-04-22 · updated 2026-06-17
• Weakness: CWE-401

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.

Affected products

• Linux kernel: from 6.4 before 6.12.80; from 6.13 before 6.18.21; from 6.19 before 6.19.11; 7.0-rc1, 7.0-rc2, 7.0-rc3, 7.0-rc4, 7.0-rc5 — fixed in 6.12.80, 6.18.21, 6.19.11

How to fix

Upgrade to a fixed version: Linux kernel 6.12.80, 6.18.21, 6.19.11. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/695b491dc3f20365fd5821f22e25dbe3c1c20cbc
• https://git.kernel.org/stable/c/9dfa00967e6ef43a9dd0887fe5c3a721a39da92e
• https://git.kernel.org/stable/c/d94f9b0ba28a205caf95902ee88b42bdb8af83d0
• https://git.kernel.org/stable/c/ee66bc29578391c9b48523dc9119af67bd5c7c0f
• https://git.kernel.org/stable/c/facd0012708e942fc12890708738aebde497564e

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