liquidio: Adjust a NULL pointer handling path in lio_vf_rep_copy_packet (Linux Linux)

CVE-2024-39506
MEDIUM 5.5

En bref

Source
NVD
EPSS
EPSS 0.29 % · centile 21 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Modified

Description

In the Linux kernel, the following vulnerability has been resolved: liquidio: Adjust a NULL pointer handling path in lio_vf_rep_copy_packet In lio_vf_rep_copy_packet() pg_info->page is compared to a NULL value, but then it is unconditionally passed to skb_add_rx_frag() which looks strange and could lead to null pointer dereference. lio_vf_rep_copy_packet() call trace looks like: octeon_droq_process_packets octeon_droq_fast_process_packets octeon_droq_dispatch_pkt octeon_create_recv_info ...search in the dispatch_list... ->disp_fn(rdisp->rinfo, ...) lio_vf_rep_pkt_recv(struct octeon_recv_info *recv_info, ...) In this path there is no code which sets pg_info->page to NULL. So this check looks unneeded and doesn't solve potential problem. But I guess the author had reason to add a check and I have no such card and can't do real test. In addition, the code in the function liquidio_push_packet() in liquidio/lio_core.c does exactly the same. Based on this, I consider the most acceptable compromise solution to adjust this issue by moving skb_add_rx_frag() into conditional scope. Found by Linux Verification Center (linuxtesting.org) with SVACE.

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 1f233f327913f3dee0602cba9c64df1903772b55 < 87d6bdc006f0cbf297a3b2ad6e40ede4c3ee5dc2 ; affected 1f233f327913f3dee0602cba9c64df1903772b55 < dcc7440f32c7a26b067aff6e7d931ec593024a79 ; affected 1f233f327913f3dee0602cba9c64df1903772b55 < cbf18d8128a753cb632bef39470d19befd9c7347 ; affected 1f233f327913f3dee0602cba9c64df1903772b55 < a86490a3712cc513113440a606a0e77130abd47c ; affected 1f233f327913f3dee0602cba9c64df1903772b55 < f1ab15a09492a5ae8ab1e2c35ba2cf9e150d25ee ; affected 1f233f327913f3dee0602cba9c64df1903772b55 < fd2b613bc4c508e55c1221c6595bb889812a4fea
Linux · Linuxaffected 4.15 ; unaffected 0 < 4.15 ; unaffected 4.19.317 ≤ 4.19.* ; unaffected 5.4.279 ≤ 5.4.* ; unaffected 5.10.221 ≤ 5.10.* ; unaffected 5.15.162 ≤ 5.15.*

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