CVE-2026-46088ALSA: control: Validate buf_len before strnlen() in snd_ctl_elem_init_enum_names()
Updated under an hour ago ()
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It affects Linux and 2 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: ALSA: control: Validate buf_len before strnlen() in snd_ctl_elem_init_enum_names() snd_ctl_elem_init_enum_names() advances pointer p through the names buffer while decrementing buf_len. If buf_len reaches zero but items remain, the next iteration calls strnlen(p, 0). While strnlen(p, 0) returns 0 and would hit the existing name_len == 0 error path, CONFIG_FORTIFY_SOURCE's fortified strnlen() first checks maxlen against __builtin_dynamic_object_size(). When Clang loses track of p's object size inside the loop, this triggers a BRK exception panic before the return value is examined. Add a buf_len == 0 guard at the loop entry to prevent calling fortified strnlen() on an exhausted buffer. Found by kernel fuzz testing through Xiaomi Smartphone.
- CVSS
- 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- Not given
- 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 15, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 8d448162bda5ae3b5ecb26fe50c8fbbeae99faa4 before 708f6ec9bcdf58bfd561409110baaf4fd3be4ea3; from 8d448162bda5ae3b5ecb26fe50c8fbbeae99faa4 before bfcbb4994da9e979c4bcfcf24aaaac69e457e48e; from 8d448162bda5ae3b5ecb26fe50c8fbbeae99faa4 before a470f7cabc4df72d9bd132f5719a8717292bb440; 8d448162bda5ae3b5ecb26fe50c8fbbeae99faa4 builds before 1fbe46d2b72754d8bd580e13e59ccb5d3d0e8cb0; 8d448162bda5ae3b5ecb26fe50c8fbbeae99faa4 builds before 8ba0214c3dd32b8ec652947e3f2bc5b8f6e6be9e; from 8d448162bda5ae3b5ecb26fe50c8fbbeae99faa4 before 654c818a69c21d2bea4e8fd9eae7da865df9a5c8; from 8d448162bda5ae3b5ecb26fe50c8fbbeae99faa4 before 82012fd3e78a14360fbc2f1a7491589896704f97; from 8d448162bda5ae3b5ecb26fe50c8fbbeae99faa4 before e0da8a8cac74f4b9f577979d131f0d2b88a84487 | CNA record |
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name) | all versions | CISA ADP |
linux linux_kernel linux:linux_kernel | from 3.2 before 5.10.258; from 5.11 before 5.15.209; from 5.16 before 6.1.175; from 6.2 before 6.6.140; from 6.7 before 6.12.86; from 6.13 before 6.18.27; from 6.19 before 7.0.4 | NVD |
References
- https://git.kernel.org/stable/c/708f6ec9bcdf58bfd561409110baaf4fd3be4ea3patch
- https://git.kernel.org/stable/c/bfcbb4994da9e979c4bcfcf24aaaac69e457e48epatch
- https://git.kernel.org/stable/c/a470f7cabc4df72d9bd132f5719a8717292bb440patch
- https://git.kernel.org/stable/c/1fbe46d2b72754d8bd580e13e59ccb5d3d0e8cb0patch
- https://git.kernel.org/stable/c/8ba0214c3dd32b8ec652947e3f2bc5b8f6e6be9epatch
- https://git.kernel.org/stable/c/654c818a69c21d2bea4e8fd9eae7da865df9a5c8patch
- https://git.kernel.org/stable/c/82012fd3e78a14360fbc2f1a7491589896704f97patch
- https://git.kernel.org/stable/c/e0da8a8cac74f4b9f577979d131f0d2b88a84487patch
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html
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.