Vulnerability details
CVE-2026-64134
Linux Linux
ALSA: pcm: Don't setup bogus iov_iter for silencing
CVSS 3.1
7.8High
Official 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 scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 7.8High | 3.1 | CVEProject cvelistV5 (CNA) (Linux) | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| Linux | Linux | 6.6 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | cf393babb37a1679a1ec1d864df1090353465e23 ≤ v < 41a766c647294842c9b17672449f8e011048cba9 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | cf393babb37a1679a1ec1d864df1090353465e23 ≤ v < ce836587e594af39ff048d9b29dee0f5f10692c9 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | cf393babb37a1679a1ec1d864df1090353465e23 ≤ v < feff0251386aa6bb180a0a1cf7c1f91ba868113d | CVEProject cvelistV5 (CNA) |
| Linux | Linux | cf393babb37a1679a1ec1d864df1090353465e23 ≤ v < c9f6768515818d71bdfc20119a81f3332c53b9c6 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | cf393babb37a1679a1ec1d864df1090353465e23 ≤ v < e4d3386b74fba8e01280484b67ee481ece00201e | CVEProject cvelistV5 (CNA) |
References and advisories
5- https://git.kernel.org/stable/c/41a766c647294842c9b17672449f8e011048cba9
- https://git.kernel.org/stable/c/ce836587e594af39ff048d9b29dee0f5f10692c9
- https://git.kernel.org/stable/c/feff0251386aa6bb180a0a1cf7c1f91ba868113d
- https://git.kernel.org/stable/c/c9f6768515818d71bdfc20119a81f3332c53b9c6
- https://git.kernel.org/stable/c/e4d3386b74fba8e01280484b67ee481ece00201e
Kolun on Telegram @kolunsec
Exploited CVEs, key news and a daily digest
Alerts for this product's next CVEsFollow the product to get new vulnerabilities on Telegram.
Details
- Published
- 2026-07-19
- Last updated
- 2026-10-19
- State
- Published
- Assigner (CNA)
- Linux
Exploit prediction (EPSS)
0.12%
Probability of exploitation in 30 days
2.5%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Total
Weaknesses (CWE)
- CWE-476NULL Pointer Dereference