CVE-2026-64134
ALSA: pcm: Don't setup bogus iov_iter for silencing
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.
INFO
Published Date :
July 19, 2026, 4:17 p.m.
Last Modified :
Aug. 13, 2026, 3:13 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
Solution
- Handle NULL data case in interleaved_copy.
- Apply ALSA PCM silencing fix.
- Update the Linux kernel.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-64134.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-64134 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-64134
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-64134 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-64134 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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Initial Analysis by [email protected]
Aug. 13, 2026
Action Type Old Value New Value Added CWE CWE-476 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.12.92 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13 up to (excluding) 6.18.34 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.19 up to (excluding) 7.0.11 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.6 up to (excluding) 6.6.142 Added Reference Type kernel.org: https://git.kernel.org/stable/c/41a766c647294842c9b17672449f8e011048cba9 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/c9f6768515818d71bdfc20119a81f3332c53b9c6 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/ce836587e594af39ff048d9b29dee0f5f10692c9 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/e4d3386b74fba8e01280484b67ee481ece00201e Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/feff0251386aa6bb180a0a1cf7c1f91ba868113d Types: Patch -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 20, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 19, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'cf393babb37a1679a1ec1d864df1090353465e23', 'lessThan': '41a766c647294842c9b17672449f8e011048cba9', 'versionType': 'git'}, {'status': 'affected', 'version': 'cf393babb37a1679a1ec1d864df1090353465e23', 'lessThan': 'ce836587e594af39ff048d9b29dee0f5f10692c9', 'versionType': 'git'}, {'status': 'affected', 'version': 'cf393babb37a1679a1ec1d864df1090353465e23', 'lessThan': 'feff0251386aa6bb180a0a1cf7c1f91ba868113d', 'versionType': 'git'}, {'status': 'affected', 'version': 'cf393babb37a1679a1ec1d864df1090353465e23', 'lessThan': 'c9f6768515818d71bdfc20119a81f3332c53b9c6', 'versionType': 'git'}, {'status': 'affected', 'version': 'cf393babb37a1679a1ec1d864df1090353465e23', 'lessThan': 'e4d3386b74fba8e01280484b67ee481ece00201e', 'versionType': 'git'}], 'programFiles': ['sound/core/pcm_lib.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.6'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.6', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.142', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.92', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.34', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.0.11', 'versionType': 'semver', 'lessThanOrEqual': '7.0.*'}, {'status': 'unaffected', 'version': '7.1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['sound/core/pcm_lib.c'], 'defaultStatus': 'affected'}] Added 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. Added Reference https://git.kernel.org/stable/c/41a766c647294842c9b17672449f8e011048cba9 Added Reference https://git.kernel.org/stable/c/c9f6768515818d71bdfc20119a81f3332c53b9c6 Added Reference https://git.kernel.org/stable/c/ce836587e594af39ff048d9b29dee0f5f10692c9 Added Reference https://git.kernel.org/stable/c/e4d3386b74fba8e01280484b67ee481ece00201e Added Reference https://git.kernel.org/stable/c/feff0251386aa6bb180a0a1cf7c1f91ba868113d