bpf: Fix stack-out-of-bounds write in devmap (Linux Linux)

CVE-2026-23359
HIGH 7.8

En bref

Source
NVD
EPSS
EPSS 0.14 % · centile 3 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Modified

Description

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix stack-out-of-bounds write in devmap get_upper_ifindexes() iterates over all upper devices and writes their indices into an array without checking bounds. Also the callers assume that the max number of upper devices is MAX_NEST_DEV and allocate excluded_devices[1+MAX_NEST_DEV] on the stack, but that assumption is not correct and the number of upper devices could be larger than MAX_NEST_DEV (e.g., many macvlans), causing a stack-out-of-bounds write. Add a max parameter to get_upper_ifindexes() to avoid the issue. When there are too many upper devices, return -EOVERFLOW and abort the redirect. To reproduce, create more than MAX_NEST_DEV(8) macvlans on a device with an XDP program attached using BPF_F_BROADCAST | BPF_F_EXCLUDE_INGRESS. Then send a packet to the device to trigger the XDP redirect path.

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:HNVD · nvd@nist.gov (Primary)

Références européennes

Avis du CERT-FR

Configurations affectées (CPE NVD)

Produits affectés

ProduitVersions
Linux · Linuxaffected aeea1b86f9363f3feabb496534d886f082a89f21 < 88df604f0d16a692867582350ce3f2fcd22243f1 ; affected aeea1b86f9363f3feabb496534d886f082a89f21 < 5000e40acc8d0c36ab709662e32120986ac22e7e ; affected aeea1b86f9363f3feabb496534d886f082a89f21 < 8a95fb9df1105b1618872c2846a6c01e3ba20b45 ; affected aeea1b86f9363f3feabb496534d886f082a89f21 < d2c31d8e03d05edc16656e5ffe187f0d1da763d7 ; affected aeea1b86f9363f3feabb496534d886f082a89f21 < 75d474702b2ba8b6bcb26eb3004dbc5e95ffd5d2 ; affected aeea1b86f9363f3feabb496534d886f082a89f21 < ca831567908fd3f73cf97d8a6c09a5054697a182
Linux · Linuxaffected 5.15 ; unaffected 0 < 5.15 ; unaffected 5.15.203 ≤ 5.15.* ; unaffected 6.1.167 ≤ 6.1.* ; unaffected 6.6.130 ≤ 6.6.* ; unaffected 6.12.77 ≤ 6.12.*

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