CVE-2026-63873: accel/amdxdna: Fix mm_struct reference leak in aie2_populate_range()

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-07-19 · updated 2026-10-30
Weakness: CWE-401

Description

In the Linux kernel, the following vulnerability has been resolved: accel/amdxdna: Fix mm_struct reference leak in aie2_populate_range() aie2_populate_range() jumps back to the again label without calling mmput(mm), leaking a reference to the mm_struct. Add the missing mmput() before jumping to again.

Affected products

Linux kernel: from 6.16 before 6.18.36; from 6.19 before 7.0.13; 7.1-rc1, 7.1-rc2, 7.1-rc3, 7.1-rc4, 7.1-rc5, 7.1-rc6 (+1) — fixed in 6.18.36, 7.0.13
Linux kernel: 6.16 — fixed in 7.1

How to fix

Upgrade to a fixed version: Linux kernel 6.18.36, 7.0.13; Linux kernel 7.1. Check the vendor advisory for mitigations.

References

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