Medium [CVE-2026-64133] Fix potential OOB array access at reading cache
This medium-severity Red Hat Linux advisory covers CVE-2026-64133 affecting Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8.
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Summary
In the Linux kernel, the following vulnerability has been resolved: ALSA: asihpi: Fix potential OOB array access at reading cache find_control() to retrieve a cached info accesses the array with the given index blindly, which may lead to an OOB array access. Add a sanity check for avoiding it.
A flaw was found in the Linux kernel, specifically within the Advanced Linux Sound Architecture (ALSA) asihpi component. This vulnerability occurs because a function designed to retrieve cached information does not properly check the boundaries of an array it is accessing.
This oversight could allow a local attacker to access memory outside of its intended limits, potentially leading to system instability (denial of service) or, in some cases, unauthorized privilege escalation.
Red Hat has rated this vulnerability as having Moderate severity because exploitation requires local access and depends on the presence of specialized AudioScience HPI sound hardware. In standard enterprise server environments, this hardware is rarely present, substantially restricting overall exposure.
An authenticated local user could trigger an out-of-bounds access within the cache control routine, resulting in a kernel crash and system denial of service. Weakness: CWE-125.
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 6 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 6 days ago·verify at source
Mitigation
The source record does not include mitigation steps. That does not mean no fix exists. Read the vendor advisory below for the authoritative guidance.
Official advisory · medium-confidence parse· fetched 6 days ago·verify at source
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