net: xfrm: unexport __init-annotated xfrm4_protocol_init() (Linux Linux)

CVE-2022-49345
MEDIUM 5.5

En bref

Source
NVD
EPSS
EPSS 0.29 % · centile 22 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Analyzed

Description

In the Linux kernel, the following vulnerability has been resolved: net: xfrm: unexport __init-annotated xfrm4_protocol_init() EXPORT_SYMBOL and __init is a bad combination because the .init.text section is freed up after the initialization. Hence, modules cannot use symbols annotated __init. The access to a freed symbol may end up with kernel panic. modpost used to detect it, but it has been broken for a decade. Recently, I fixed modpost so it started to warn it again, then this showed up in linux-next builds. There are two ways to fix it: - Remove __init - Remove EXPORT_SYMBOL I chose the latter for this case because the only in-tree call-site, net/ipv4/xfrm4_policy.c is never compiled as modular. (CONFIG_XFRM is boolean)

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 2f32b51b609faea1e40bb8c5bd305f1351740936 < c58d82a1264813e69119c13e9804e2e60b664ad5 ; affected 2f32b51b609faea1e40bb8c5bd305f1351740936 < e53cd3814504b2cadaba4d5a8a07eeea9ddacd03 ; affected 2f32b51b609faea1e40bb8c5bd305f1351740936 < 31f3c6a4dcd3260a386e62cef2d5b36e902600a1 ; affected 2f32b51b609faea1e40bb8c5bd305f1351740936 < ef6d2354de238b065d8799c80da4be9a6af18e39 ; affected 2f32b51b609faea1e40bb8c5bd305f1351740936 < be3884d5cd04ccd58294b83a02d70b7c5fca19d3 ; affected 2f32b51b609faea1e40bb8c5bd305f1351740936 < 85a055c03691e51499123194a14a0c249cf33227
Linux · Linuxaffected 3.15 ; unaffected 0 < 3.15 ; unaffected 4.9.318 ≤ 4.9.* ; unaffected 4.14.283 ≤ 4.14.* ; unaffected 4.19.247 ≤ 4.19.* ; unaffected 5.4.198 ≤ 5.4.*

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