wifi: wilc1000: fix u8 overflow in SSID scan buffer size calculation (Linux Linux)

CVE-2026-31780
HIGH 7.8

En bref

Source
NVD
EPSS
EPSS 0.14 % · centile 4 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Analyzed

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: wilc1000: fix u8 overflow in SSID scan buffer size calculation The variable valuesize is declared as u8 but accumulates the total length of all SSIDs to scan. Each SSID contributes up to 33 bytes (IEEE80211_MAX_SSID_LEN + 1), and with WILC_MAX_NUM_PROBED_SSID (10) SSIDs the total can reach 330, which wraps around to 74 when stored in a u8. This causes kmalloc to allocate only 75 bytes while the subsequent memcpy writes up to 331 bytes into the buffer, resulting in a 256-byte heap buffer overflow. Widen valuesize from u8 to u32 to accommodate the full range.

Faiblesses (CWE)

Références

Scores

VersionScoreVecteurÉvalué par
CVSS 3.1HIGH 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HLinux
CVSS 3.1HIGH 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HNVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary)

Références européennes

Avis du CERT-FR

Configurations affectées (CPE NVD)

Produits affectés

ProduitVersions
Linux · Linuxaffected c5c77ba18ea66aa05441c71e38473efb787705a4 < 34a23fd9ddd683a03c7e8cc0ceded3e59e354b99 ; affected c5c77ba18ea66aa05441c71e38473efb787705a4 < 549f02d8ec94d39092ab6d9b103d0d6783a4b024 ; affected c5c77ba18ea66aa05441c71e38473efb787705a4 < bfbddeadd4779651403035ee177ae2f22f9f5521 ; affected c5c77ba18ea66aa05441c71e38473efb787705a4 < 9907ac9b9a18b92fc34b9e4cb9e10f208dc1d3f7 ; affected c5c77ba18ea66aa05441c71e38473efb787705a4 < c97b2a00059608592ad0d86fbb813a4f8cf9464b ; affected c5c77ba18ea66aa05441c71e38473efb787705a4 < d8388614de613c28eeb659c10115060a83739924
Linux · Linuxaffected 4.2 ; unaffected 0 < 4.2 ; unaffected 5.10.253 ≤ 5.10.* ; unaffected 5.15.203 ≤ 5.15.* ; unaffected 6.1.168 ≤ 6.1.* ; unaffected 6.6.134 ≤ 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