bpf: Fix use-after-free in offloaded map/prog info fill (Linux Linux)

CVE-2026-53089
HIGH 7.8

En bref

Source
NVD
EPSS
EPSS 0.12 % · 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: bpf: Fix use-after-free in offloaded map/prog info fill When querying info for an offloaded BPF map or program, bpf_map_offload_info_fill_ns() and bpf_prog_offload_info_fill_ns() obtain the network namespace with get_net(dev_net(offmap->netdev)). However, the associated netdev's netns may be racing with teardown during netns destruction. If the netns refcount has already reached 0, get_net() performs a refcount_t increment on 0, triggering: refcount_t: addition on 0; use-after-free. Although rtnl_lock and bpf_devs_lock ensure the netdev pointer remains valid, they cannot prevent the netns refcount from reaching zero. Fix this by using maybe_get_net() instead of get_net(). maybe_get_net() uses refcount_inc_not_zero() and returns NULL if the refcount is already zero, which causes ns_get_path_cb() to fail and the caller to return -ENOENT -- the correct behavior when the netns is being destroyed.

Faiblesses (CWE)

  • CWE-416 — Utilisation après libération

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 675fc275a3a2d905535207237402c6d8dcb5fa4b < 43d6848a2a6c92ccfd614d9f0bb6fd85b95dfa9d ; affected 675fc275a3a2d905535207237402c6d8dcb5fa4b < 642943ae5bdacabc8109dc4a5e0ebb4a6b99ef3e ; affected 675fc275a3a2d905535207237402c6d8dcb5fa4b < fea55b034328feaafef75aee252f305e6f85a991 ; affected 675fc275a3a2d905535207237402c6d8dcb5fa4b < 5662dac41a3442aa378d7c405164903eb109fc05 ; affected 675fc275a3a2d905535207237402c6d8dcb5fa4b < 1a2dc103e16448d022a77ad5fc3234641436c4b7 ; affected 675fc275a3a2d905535207237402c6d8dcb5fa4b < 85dc711f742b192eb97c0e00b521312f5a7a415e
Linux · Linuxaffected 4.16 ; unaffected 0 < 4.16 ; unaffected 5.10.269 ≤ 5.10.* ; unaffected 5.15.220 ≤ 5.15.* ; unaffected 6.1.187 ≤ 6.1.* ; unaffected 6.6.156 ≤ 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