CVE-2026-31440

Summary

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 Software

VendorProductVersion RangeStatus
LinuxLinux244da66cda359227d80ccb41dbcb99da40eae186 < 695b491dc3f20365fd5821f22e25dbe3c1c20cbcaffected
LinuxLinux244da66cda359227d80ccb41dbcb99da40eae186 < d94f9b0ba28a205caf95902ee88b42bdb8af83d0affected
LinuxLinux244da66cda359227d80ccb41dbcb99da40eae186 < facd0012708e942fc12890708738aebde497564eaffected
LinuxLinux244da66cda359227d80ccb41dbcb99da40eae186 < 9dfa00967e6ef43a9dd0887fe5c3a721a39da92eaffected
LinuxLinux244da66cda359227d80ccb41dbcb99da40eae186 < ee66bc29578391c9b48523dc9119af67bd5c7c0faffected
LinuxLinux6.4affected
LinuxLinux0 < 6.4unaffected
LinuxLinux6.6.140 <= 6.6.*unaffected
LinuxLinux6.12.80 <= 6.12.*unaffected
LinuxLinux6.18.21 <= 6.18.*unaffected
LinuxLinux6.19.11 <= 6.19.*unaffected
LinuxLinux7.0 <= *unaffected

Weaknesses

References