libceph: Fix potential null-ptr-deref in decode_choose_args() (Linux Linux)

CVE-2026-52957
HIGH 7.5

En bref

Source
NVD
EPSS
EPSS 0.52 % · centile 44 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Modified

Description

In the Linux kernel, the following vulnerability has been resolved: libceph: Fix potential null-ptr-deref in decode_choose_args() A message of type CEPH_MSG_OSD_MAP contains an OSD map that itself contains a CRUSH map. When decoding this CRUSH map in crush_decode(), an array of max_buckets CRUSH buckets is decoded, where some indices may not refer to actual buckets and are therefore set to NULL. The received CRUSH map may optionally contain choose_args that get decoded in decode_choose_args(). When decoding a crush_choose_arg_map, a series of choose_args for different buckets is decoded, with the bucket_index being read from the incoming message. It is only checked that the bucket index does not exceed max_buckets, but not that it doesn't point to an index with a NULL bucket. If a (potentially corrupted) message contains a crush_choose_arg_map including such a bucket_index, a null pointer dereference may occur in the subsequent processing when attempting to access the bucket with the given index. This patch fixes the issue by extending the affected check. Now, it is only attempted to access the bucket if it is not NULL.

Faiblesses (CWE)

  • CWE-476 — Déréférencement de pointeur nul

Références

Scores

VersionScoreVecteurÉvalué par
CVSS 3.1HIGH 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HLinux
CVSS 3.1HIGH 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HNVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary)

Références européennes

Avis du CERT-FR

Configurations affectées (CPE NVD)

Produits affectés

ProduitVersions
Linux · Linuxaffected c7ed1a4bf4b446317eefa0f4916d94b1f6d3ada5 < d55ffad8d422b5d1cc44dad32bd3d25f4471cd9f ; affected c7ed1a4bf4b446317eefa0f4916d94b1f6d3ada5 < 301286c0ccd37d66b0e40786fd35a4f19cdbd88a ; affected c7ed1a4bf4b446317eefa0f4916d94b1f6d3ada5 < 7169f326a23d0f547fcd90e68b72fd387622e126 ; affected c7ed1a4bf4b446317eefa0f4916d94b1f6d3ada5 < d7a65a34d2453f8cd3e0cc0e1319740af7e24276 ; affected c7ed1a4bf4b446317eefa0f4916d94b1f6d3ada5 < 312ec973efac0efb9b9ed64214235910e9ecbaa8 ; affected c7ed1a4bf4b446317eefa0f4916d94b1f6d3ada5 < f2f95e6d4b97e70bb876139b0583fc8079983f85
Linux · Linuxaffected 4.13 ; unaffected 0 < 4.13 ; unaffected 5.10.258 ≤ 5.10.* ; unaffected 5.15.209 ≤ 5.15.* ; unaffected 6.1.175 ≤ 6.1.* ; unaffected 6.6.141 ≤ 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