x86, relocs: Ignore relocations in .notes section (Linux Linux)

CVE-2024-26816
MEDIUM 5.5

En bref

Source
NVD
EPSS
EPSS 0.31 % · centile 24 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Modified

Description

In the Linux kernel, the following vulnerability has been resolved: x86, relocs: Ignore relocations in .notes section When building with CONFIG_XEN_PV=y, .text symbols are emitted into the .notes section so that Xen can find the "startup_xen" entry point. This information is used prior to booting the kernel, so relocations are not useful. In fact, performing relocations against the .notes section means that the KASLR base is exposed since /sys/kernel/notes is world-readable. To avoid leaking the KASLR base without breaking unprivileged tools that are expecting to read /sys/kernel/notes, skip performing relocations in the .notes section. The values readable in .notes are then identical to those found in System.map.

Faiblesses (CWE)

  • CWE-770 — Allocation de ressources sans limite ni régulation

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 5ead97c84fa7d63a6a7a2f4e9f18f452bd109045 < 13edb509abc91c72152a11baaf0e7c060a312e03 ; affected 5ead97c84fa7d63a6a7a2f4e9f18f452bd109045 < 52018aa146e3cf76569a9b1e6e49a2b7c8d4a088 ; affected 5ead97c84fa7d63a6a7a2f4e9f18f452bd109045 < a4e7ff1a74274e59a2de9bb57236542aa990d20a ; affected 5ead97c84fa7d63a6a7a2f4e9f18f452bd109045 < c7cff9780297d55d97ad068b68b703cfe53ef9af ; affected 5ead97c84fa7d63a6a7a2f4e9f18f452bd109045 < 47635b112a64b7b208224962471e7e42f110e723 ; affected 5ead97c84fa7d63a6a7a2f4e9f18f452bd109045 < af2a9f98d884205145fd155304a6955822ccca1c
Linux · Linuxaffected 2.6.23 ; unaffected 0 < 2.6.23 ; unaffected 4.19.311 ≤ 4.19.* ; unaffected 5.4.273 ≤ 5.4.* ; unaffected 5.10.214 ≤ 5.10.* ; unaffected 5.15.153 ≤ 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