CVE-2026-46088

ALSA: control: Validate buf_len before strnlen() in snd_ctl_elem_init_enum_names()

MEDIUM 5.5

En bref

Source
NVD
EPSS
EPSS 0.13 % · centile 2 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Modified

Description

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.

Références

Scores

VersionScoreVecteurÉvalué par
CVSS 3.1MEDIUM 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HNVD · nvd@nist.gov (Primary)

Références européennes

Avis du CERT-FR

Configurations affectées (CPE NVD)

Produits affectés

ProduitVersions
Linux · Linuxaffected 8d448162bda5ae3b5ecb26fe50c8fbbeae99faa4 < 708f6ec9bcdf58bfd561409110baaf4fd3be4ea3 ; affected 8d448162bda5ae3b5ecb26fe50c8fbbeae99faa4 < bfcbb4994da9e979c4bcfcf24aaaac69e457e48e ; affected 8d448162bda5ae3b5ecb26fe50c8fbbeae99faa4 < a470f7cabc4df72d9bd132f5719a8717292bb440 ; affected 8d448162bda5ae3b5ecb26fe50c8fbbeae99faa4 < 1fbe46d2b72754d8bd580e13e59ccb5d3d0e8cb0 ; affected 8d448162bda5ae3b5ecb26fe50c8fbbeae99faa4 < 8ba0214c3dd32b8ec652947e3f2bc5b8f6e6be9e ; affected 8d448162bda5ae3b5ecb26fe50c8fbbeae99faa4 < 654c818a69c21d2bea4e8fd9eae7da865df9a5c8
Linux · Linuxaffected 3.2 ; unaffected 0 < 3.2 ; unaffected 5.10.258 ≤ 5.10.* ; unaffected 5.15.209 ≤ 5.15.* ; unaffected 6.1.175 ≤ 6.1.* ; unaffected 6.6.140 ≤ 6.6.*

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD