CVE-2025-68344: ALSA: wavefront: Fix integer overflow in sample size validation

Severity: unknown
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: 2025-12-24 · updated 2026-10-19

Description

In the Linux kernel, the following vulnerability has been resolved: ALSA: wavefront: Fix integer overflow in sample size validation The wavefront_send_sample() function has an integer overflow issue when validating sample size. The header->size field is u32 but gets cast to int for comparison with dev->freemem Fix by using unsigned comparison to avoid integer overflow.

Affected products

Linux kernel: 2.6.12 — fixed in 6.19

How to fix

Upgrade to a fixed version: Linux kernel 6.19. Check the vendor advisory for mitigations.

References

https://git.kernel.org/stable/c/02b63f3bc29265bd9e83191792d200ed563acacf
https://git.kernel.org/stable/c/0c4a13ba88594fd4a27292853e736c6b4349823d
https://git.kernel.org/stable/c/1823e08f76c68b9e1d26f6d5ef831b96f61a62a0
https://git.kernel.org/stable/c/488bf86d60077f52810c60dbdf7468c277880167
https://git.kernel.org/stable/c/4f811071e702fbb74933526e2fbadf8c4ed0c0c4
https://git.kernel.org/stable/c/5588b7c86effffa9bb55383a38800649d7b40778
https://git.kernel.org/stable/c/bca11de0a277b8baeb7d006f93b543c907b6e782
https://git.kernel.org/stable/c/d2f5d8cf1eadb7b33e476f59aa9c6653e4f2b937

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