High 7.8Published Jul 19, 2026

CVE-2026-64134ALSA: pcm: Don't setup bogus iov_iter for silencing

Updated under an hour ago (Oct 26, 2026, 7:50 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: ALSA: pcm: Don't setup bogus iov_iter for silencing At transition to the iov_iter for PCM data transfer, we blindly applied the iov_iter setup also for silencing (i.e. data = NULL), and it leads to a calculation of bogus iov_iter. Fortunately this didn't cause troubles on most of architectures but it goes wrong on RISC-V now, causing a NULL dereference. Handle the NULL data case to treat the silencing in interleaved_copy() for addressing the bug above. noninterleaved_copy() has already the NULL data handling, so it doesn't need changes.

CVSS: 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-476
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Oct 19, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from cf393babb37a1679a1ec1d864df1090353465e23 before 41a766c647294842c9b17672449f8e011048cba9; from cf393babb37a1679a1ec1d864df1090353465e23 before ce836587e594af39ff048d9b29dee0f5f10692c9; from cf393babb37a1679a1ec1d864df1090353465e23 before feff0251386aa6bb180a0a1cf7c1f91ba868113d; from cf393babb37a1679a1ec1d864df1090353465e23 before c9f6768515818d71bdfc20119a81f3332c53b9c6; from cf393babb37a1679a1ec1d864df1090353465e23 before e4d3386b74fba8e01280484b67ee481ece00201e	CNA record
linux linux_kernel linux:linux_kernel	from 6.6 before 6.6.142; from 6.7 before 6.12.92; from 6.13 before 6.18.34; from 6.19 before 7.0.11; 7.1; 7.1; 7.1; 7.1	NVD

References

References

https://git.kernel.org/stable/c/41a766c647294842c9b17672449f8e011048cba9	patch
https://git.kernel.org/stable/c/ce836587e594af39ff048d9b29dee0f5f10692c9	patch
https://git.kernel.org/stable/c/feff0251386aa6bb180a0a1cf7c1f91ba868113d	patch
https://git.kernel.org/stable/c/c9f6768515818d71bdfc20119a81f3332c53b9c6	patch
https://git.kernel.org/stable/c/e4d3386b74fba8e01280484b67ee481ece00201e	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.