Medium [CVE-2026-64488] check snd_ctl_new1 return value
This medium-severity Red Hat Linux advisory covers CVE-2026-64488 affecting Red Hat Enterprise Linux 6, Red Hat package: kernel.
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Summary
In the Linux kernel, the following vulnerability has been resolved: ALSA: aoa: check snd_ctl_new1() return value snd_ctl_new1() can return NULL when memory allocation fails. In layout.c, the function does not check the return value before dereferencing ctl->id.name or passing to aoa_snd_ctl_add(), which can lead to a NULL pointer dereference.
Add NULL checks after snd_ctl_new1() calls and return early if any fails. A flaw was found in the Linux kernel's Advanced Linux Sound Architecture (ALSA) 'aoa' component.
This vulnerability arises when a specific function, `snd_ctl_new1()`, fails to allocate memory and returns an invalid pointer. The kernel then attempts to use this invalid pointer, which can cause the system to crash.
This could allow a local attacker to trigger a Denial of Service (DoS) condition, making the system unavailable. Red Hat severity: Low — CVSS 5.5 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).
Weakness: CWE-476. Affected Red Hat products: Red Hat Enterprise Linux 6.
Will not fix / out of support: Red Hat Enterprise Linux 6. Red Hat does not currently list a fixing RHSA for this CVE.
Affected products named by the advisory: Red Hat package: kernel.
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 1 month 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 1 month 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 1 month ago·verify at source
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