nfc: pn533: allocate rx skb before consuming bytes (Linux Linux)

CVE-2026-31660
MEDIUM 5.5

En bref

Source
NVD
EPSS
EPSS 0.11 % · centile 1 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Analyzed

Description

In the Linux kernel, the following vulnerability has been resolved: nfc: pn533: allocate rx skb before consuming bytes pn532_receive_buf() reports the number of accepted bytes to the serdev core. The current code consumes bytes into recv_skb and may already hand a complete frame to pn533_recv_frame() before allocating a fresh receive buffer. If that alloc_skb() fails, the callback returns 0 even though it has already consumed bytes, and it leaves recv_skb as NULL for the next receive callback. That breaks the receive_buf() accounting contract and can also lead to a NULL dereference on the next skb_put_u8(). Allocate the receive skb lazily before consuming the next byte instead. If allocation fails, return the number of bytes already accepted.

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 c656aa4c27b17a8c70da223ed5ab42145800d6b5 < 2ca64fb7e2d2ae14619dd204d4f2f0a601f421fb ; affected c656aa4c27b17a8c70da223ed5ab42145800d6b5 < 8b71299d587d9e4c830c18afb884c80ddb30ad28 ; affected c656aa4c27b17a8c70da223ed5ab42145800d6b5 < 16649adc2e19509104245ea1f349b629d858f11f ; affected c656aa4c27b17a8c70da223ed5ab42145800d6b5 < 07cb6c72e66ba548679f22ac29ad588da8999279 ; affected c656aa4c27b17a8c70da223ed5ab42145800d6b5 < a9495069b43b8634c1ae0042e888766c34f66637 ; affected c656aa4c27b17a8c70da223ed5ab42145800d6b5 < 21ae2cda66a55c759607bbf1d23cbaa42019d2de
Linux · Linuxaffected 5.5 ; unaffected 0 < 5.5 ; unaffected 5.10.253 ≤ 5.10.* ; unaffected 5.15.203 ≤ 5.15.* ; unaffected 6.1.169 ≤ 6.1.* ; unaffected 6.6.135 ≤ 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