usb: class: cdc-wdm: fix reordering issue in read code path (Linux Linux)

CVE-2026-43427
HIGH 7.1

En bref

Source
NVD
EPSS
EPSS 0.13 % · centile 3 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Analyzed

Description

In the Linux kernel, the following vulnerability has been resolved: usb: class: cdc-wdm: fix reordering issue in read code path Quoting the bug report: Due to compiler optimization or CPU out-of-order execution, the desc->length update can be reordered before the memmove. If this happens, wdm_read() can see the new length and call copy_to_user() on uninitialized memory. This also violates LKMM data race rules [1]. Fix it by using WRITE_ONCE and memory barriers.

Faiblesses (CWE)

Références

Scores

VersionScoreVecteurÉvalué par
CVSS 3.1HIGH 7.1CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:HNVD · nvd@nist.gov (Primary)

Références européennes

Avis du CERT-FR

Configurations affectées (CPE NVD)

Produits affectés

ProduitVersions
Linux · Linuxaffected afba937e540c902c989cd516fd97ea0c8499bb27 < 638328ca9c17ae6511ad62198c57bae32ffa3c91 ; affected afba937e540c902c989cd516fd97ea0c8499bb27 < 170e8daca24da6edb4be82ab01abf44e87af387b ; affected afba937e540c902c989cd516fd97ea0c8499bb27 < c8fa96ed021923dae147bcd9f9205b8df7b82360 ; affected afba937e540c902c989cd516fd97ea0c8499bb27 < 4ee3062bf2c9a722afef429826e8607eaf3fc6a0 ; affected afba937e540c902c989cd516fd97ea0c8499bb27 < 276aef0fd2b92f41b920ac891c72cadeee957934 ; affected afba937e540c902c989cd516fd97ea0c8499bb27 < 67ed312124bb1b61858778ac0b985b48961c862a
Linux · Linuxaffected 2.6.26 ; unaffected 0 < 2.6.26 ; unaffected 5.10.253 ≤ 5.10.* ; unaffected 5.15.203 ≤ 5.15.* ; unaffected 6.1.167 ≤ 6.1.* ; unaffected 6.6.130 ≤ 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