CVE-2026-64134
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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.13%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.13% probability · 3th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-476
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/41a766c647294842c9b17672449f8e011048cba9Patch
- https://git.kernel.org/stable/c/c9f6768515818d71bdfc20119a81f3332c53b9c6Patch
- https://git.kernel.org/stable/c/ce836587e594af39ff048d9b29dee0f5f10692c9Patch
- https://git.kernel.org/stable/c/e4d3386b74fba8e01280484b67ee481ece00201ePatch
- https://git.kernel.org/stable/c/feff0251386aa6bb180a0a1cf7c1f91ba868113dPatch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.