Advisory [CVE-2026-64023] fix a potential use-after-free
This security Red Hat Linux advisory covers CVE-2026-64023.
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Summary
In the Linux kernel, the following vulnerability has been resolved: gpio: aggregator: fix a potential use-after-free On error we free aggr->lookups->dev_id before removing the entry from the lookup table.
If a concurrent thread calls gpiod_find() before we remove the entry, it could iterate over the list and call gpiod_match_lookup_table() which unconditionally dereferences dev_id when calling strcmp(). Reverse the order of cleanup.
A flaw was found in the Linux kernel's GPIO (General Purpose Input/Output) aggregator module. This vulnerability occurs when an error condition causes memory to be prematurely freed while still being referenced in a lookup table.
A local attacker could potentially exploit this timing issue, leading to a use-after-free condition. This could result in a system crash or other unpredictable behavior, impacting system stability.
Red Hat severity: not rated. Weakness: CWE-825.
Red Hat lists Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9 as not affected.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · medium-confidence parse· fetched 7 days ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · medium-confidence parse· fetched 7 days ago·verify at source
Mitigation
The source record does not include mitigation steps. That is not a statement that no fix exists — read the vendor advisory below for the authoritative guidance.
Official advisory · medium-confidence parse· fetched 7 days ago·verify at source
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