net/sunrpc: fix potential memory leaks in rpc_sysfs_xprt_state_change() (Linux Linux)

CVE-2022-50046
MEDIUM 5.5

En bref

Source
NVD
EPSS
EPSS 0.19 % · centile 9 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Analyzed

Description

In the Linux kernel, the following vulnerability has been resolved: net/sunrpc: fix potential memory leaks in rpc_sysfs_xprt_state_change() The issue happens on some error handling paths. When the function fails to grab the object `xprt`, it simply returns 0, forgetting to decrease the reference count of another object `xps`, which is increased by rpc_sysfs_xprt_kobj_get_xprt_switch(), causing refcount leaks. Also, the function forgets to check whether `xps` is valid before using it, which may result in NULL-dereferencing issues. Fix it by adding proper error handling code when either `xprt` or `xps` is NULL.

Faiblesses (CWE)

  • CWE-401 — Mémoire non libérée après sa durée de vie utile

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 5b7eb78486cd9ac58bfbd6d84ea0fe2d9fead03b < c0434f0e058648649250b8ed6078b66d773de723 ; affected 5b7eb78486cd9ac58bfbd6d84ea0fe2d9fead03b < 76fbeb1662b1c56514325118a07fba74dc4c79fe ; affected 5b7eb78486cd9ac58bfbd6d84ea0fe2d9fead03b < bfc48f1b0505ffcb03a6d749139b7577d6b81ae0
Linux · Linuxaffected 5.14 ; unaffected 0 < 5.14 ; unaffected 5.15.63 ≤ 5.15.* ; unaffected 5.19.4 ≤ 5.19.* ; unaffected 6.0 ≤ *

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