staging: rtl8723bs: fix WEP length underflow and OOB read in OnAuth() (Linux Linux)

CVE-2026-64445
HIGH 8.8

En bref

Source
NVD
EPSS
EPSS 0.32 % · centile 25 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Modified

Description

In the Linux kernel, the following vulnerability has been resolved: staging: rtl8723bs: fix WEP length underflow and OOB read in OnAuth() OnAuth() has two bugs in the shared-key authentication path. When the Privacy bit is set, rtw_wep_decrypt() is called without verifying that the frame is long enough to contain a valid WEP IV and ICV. Inside rtw_wep_decrypt(), length is computed as: length = len - WLAN_HDR_A3_LEN - iv_len and then passed as (length - 4) to crc32_le(). If len is less than WLAN_HDR_A3_LEN + iv_len + icv_len (32 bytes), length - 4 is negative and, after the implicit cast to size_t, causes crc32_le() to read far beyond the frame buffer. Add a minimum length check before accessing the IV field and calling the decryption path. When processing a seq=3 response, rtw_get_ie() stores the Challenge Text IE length in ie_len, but the subsequent memcmp() always reads 128 bytes regardless of ie_len. IEEE 802.11 mandates a challenge text of exactly 128 bytes; reject any IE whose length field differs, matching the check already applied to OnAuthClient().

Faiblesses (CWE)

Références

Scores

VersionScoreVecteurÉvalué par
CVSS 3.1HIGH 8.8CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HLinux
CVSS 3.1HIGH 8.8CVSS:3.1/AV:A/AC:L/PR:N/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 554c0a3abf216c991c5ebddcdb2c08689ecd290b < 665e1ecb68b4e8419604e70a33f02d1c8b0222c6 ; affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b < 87cccc2a767f17dcab71e3b9fe5ae29b5516c5ce ; affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b < c9000c93078e5c0a5a651b077c0ec92a4bc7d580 ; affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b < 1f6c9d255bdda41216b6e34c96aa2b1abee0bb84 ; affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b < 3e44a7665f3abd320a80d9c64ee4a93317041b8b ; affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b < 64ec4192d9c10e96922245d4a6747304cc76b19d
Linux · Linuxaffected 4.12 ; unaffected 0 < 4.12 ; unaffected 5.10.261 ≤ 5.10.* ; unaffected 5.15.212 ≤ 5.15.* ; unaffected 6.1.178 ≤ 6.1.* ; unaffected 6.6.145 ≤ 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