usb: gadget: f_phonet: fix skb frags[] overflow in pn_rx_complete() (Linux Linux)

CVE-2026-31616
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: usb: gadget: f_phonet: fix skb frags[] overflow in pn_rx_complete() A broken/bored/mean USB host can overflow the skb_shared_info->frags[] array on a Linux gadget exposing a Phonet function by sending an unbounded sequence of full-page OUT transfers. pn_rx_complete() finalizes the skb only when req->actual < req->length, where req->length is set to PAGE_SIZE by the gadget. If the host always sends exactly PAGE_SIZE bytes per transfer, fp->rx.skb will never be reset and each completion will add another fragment via skb_add_rx_frag(). Once nr_frags exceeds MAX_SKB_FRAGS (default 17), subsequent frag stores overwrite memory adjacent to the shinfo on the heap. Drop the skb and account a length error when the frag limit is reached, matching the fix applied in t7xx by commit f0813bcd2d9d ("net: wwan: t7xx: fix potential skb->frags overflow in RX path").

Faiblesses (CWE)

  • CWE-401 — Mémoire non libérée après sa durée de vie utile

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 b91cd1440870f7a0649e570498b7b93caf9f781c < 3d7f7e0c842242878c24b2facff8d6eda23ee1e9 ; affected b91cd1440870f7a0649e570498b7b93caf9f781c < b5ec49fa198bd08967a3102bd41f53ccadce72c9 ; affected b91cd1440870f7a0649e570498b7b93caf9f781c < 7424f0287da73d3d8c5fa5e9d25d26fce762708e ; affected b91cd1440870f7a0649e570498b7b93caf9f781c < 9ceff1251904901b0b4e5fe6350fcaffa368ce83 ; affected b91cd1440870f7a0649e570498b7b93caf9f781c < c9315ce9da3632c591666a29de82d3e92d46bec1 ; affected b91cd1440870f7a0649e570498b7b93caf9f781c < 4e476c25bfcab0535ba7c76a903ae77ca8747711
Linux · Linuxaffected 2.6.32 ; unaffected 0 < 2.6.32 ; unaffected 5.10.258 ≤ 5.10.* ; unaffected 5.15.209 ≤ 5.15.* ; unaffected 6.1.175 ≤ 6.1.* ; unaffected 6.6.136 ≤ 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