In the Linux kernel, the following vulnerability has been resolved: ALSA: es1938: check snd_ctl_new1() return value snd_ctl_new1() can return NULL… (CVE-2026-64484)
Source GCVE Database
No CVSS score published yet
- Exploitation
Not in CISA KEV, no exploitation reported
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 7% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
What to do
AI-suggested
A fix has been implemented that adds a NULL pointer check after snd_ctl_new1() and returns an error if memory allocation fails. Users should update to the patched Linux kernel version containing this fix. Patch status is not explicitly confirmed in the provided data; check the vendor advisory for current remediation guidance.
Description
In the Linux kernel, the following vulnerability has been resolved: ALSA: es1938: check snd_ctl_new1() return value snd_ctl_new1() can return NULL when memory allocation fails. snd_es1938_mixer() does not check the return value before dereferencing the pointer, which can lead to a NULL pointer dereference. Add a NULL check after snd_ctl_new1() and return -ENOMEM if it fails.
Impact
This vulnerability could lead to a NULL pointer dereference in the ALSA es1938 driver, potentially causing a kernel crash or denial of service. There is no indication of code execution or privilege escalation from the provided data.
Summary
The Linux kernel ALSA es1938 driver contained a vulnerability where the snd_ctl_new1() function could return NULL due to memory allocation failure. The snd_es1938_mixer() function failed to verify this return value before dereferencing it, which could cause a NULL pointer dereference. The vulnerability was resolved by adding a NULL check after snd_ctl_new1() and returning -ENOMEM if the allocation failed.
References
- nvd.nist.gov/vuln/detail/CVE-2026-64484 (opens in a new tab)
- git.kernel.org/stable/c/1949163dee39e0e4a1468f37dd7302962f6af45a (opens in a new tab)
- git.kernel.org/stable/c/1edd1f02dddd20aeb6066ded41017615766ea42f (opens in a new tab)
- git.kernel.org/stable/c/41759affbcfe3d51a32900da9547a1ffd744a85f (opens in a new tab)
- git.kernel.org/stable/c/6c4efebaf73e217efbd08cdbda805758a7db3680 (opens in a new tab)
- git.kernel.org/stable/c/7531a37720c2545a480fd0fa464978569bf9d6a2 (opens in a new tab)
- git.kernel.org/stable/c/96cad5bd7d0a176db3fdc06717a41271247336bd (opens in a new tab)
- git.kernel.org/stable/c/9e53e99b6fa3cd82992d963cbff58dbbd1df8651 (opens in a new tab)
- git.kernel.org/stable/c/af01c48e17a66fa038af210a5c49d6cdefd210bd (opens in a new tab)