dpaa2-switch: prevent ZERO_SIZE_PTR dereference when num_ifs is zero (Linux Linux)

CVE-2026-23206
MEDIUM 5.5

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: dpaa2-switch: prevent ZERO_SIZE_PTR dereference when num_ifs is zero The driver allocates arrays for ports, FDBs, and filter blocks using kcalloc() with ethsw->sw_attr.num_ifs as the element count. When the device reports zero interfaces (either due to hardware configuration or firmware issues), kcalloc(0, ...) returns ZERO_SIZE_PTR (0x10) instead of NULL. Later in dpaa2_switch_probe(), the NAPI initialization unconditionally accesses ethsw->ports[0]->netdev, which attempts to dereference ZERO_SIZE_PTR (address 0x10), resulting in a kernel panic. Add a check to ensure num_ifs is greater than zero after retrieving device attributes. This prevents the zero-sized allocations and subsequent invalid pointer dereference.

Faiblesses (CWE)

  • CWE-476 — Déréférencement de pointeur nul

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 0b1b71370458860579831e77485883fcf2e8fbbe < 2fcccca88456b592bd668db13aa1d29ed257ca2b ; affected 0b1b71370458860579831e77485883fcf2e8fbbe < 80165ff16051448d6f840585ebe13f2400415df3 ; affected 0b1b71370458860579831e77485883fcf2e8fbbe < b97415c4362f739e25ec6f71012277086fabdf6f ; affected 0b1b71370458860579831e77485883fcf2e8fbbe < 4acc40db06ffd0fd92683505342b00c8a7394c60 ; affected 0b1b71370458860579831e77485883fcf2e8fbbe < 155eb99aff2920153bf21217ae29565fff81e6af ; affected 0b1b71370458860579831e77485883fcf2e8fbbe < ed48a84a72fefb20a82dd90a7caa7807e90c6f66
Linux · Linuxaffected 5.13 ; unaffected 0 < 5.13 ; unaffected 5.15.200 ≤ 5.15.* ; unaffected 6.1.163 ≤ 6.1.* ; unaffected 6.6.124 ≤ 6.6.* ; unaffected 6.12.70 ≤ 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