efistub/tpm: Use ACPI reclaim memory for event log to avoid corruption (Linux Linux)

CVE-2024-49858
MEDIUM 5.5

En bref

Source
NVD
EPSS
EPSS 0.21 % · centile 12 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Modified

Description

In the Linux kernel, the following vulnerability has been resolved: efistub/tpm: Use ACPI reclaim memory for event log to avoid corruption The TPM event log table is a Linux specific construct, where the data produced by the GetEventLog() boot service is cached in memory, and passed on to the OS using an EFI configuration table. The use of EFI_LOADER_DATA here results in the region being left unreserved in the E820 memory map constructed by the EFI stub, and this is the memory description that is passed on to the incoming kernel by kexec, which is therefore unaware that the region should be reserved. Even though the utility of the TPM2 event log after a kexec is questionable, any corruption might send the parsing code off into the weeds and crash the kernel. So let's use EFI_ACPI_RECLAIM_MEMORY instead, which is always treated as reserved by the E820 conversion logic.

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 33b6d03469b2206fb51ecc37f40411a857ad8fff < f76b69ab9cf04358266e3cea5748c0c2791fbb08 ; affected 33b6d03469b2206fb51ecc37f40411a857ad8fff < 11690d7e76842f29b60fbb5b35bc97d206ea0e83 ; affected 33b6d03469b2206fb51ecc37f40411a857ad8fff < 5b22c038fb2757c652642933de5664da471f8cb7 ; affected 33b6d03469b2206fb51ecc37f40411a857ad8fff < 19fd2f2c5fb36b61506d3208474bfd8fdf1cada3 ; affected 33b6d03469b2206fb51ecc37f40411a857ad8fff < 38d9b07d99b789efb6d8dda21f1aaad636c38993 ; affected 33b6d03469b2206fb51ecc37f40411a857ad8fff < 2e6871a632a99d9b9e2ce3a7847acabe99e5a26e
Linux · Linuxaffected 4.16 ; unaffected 0 < 4.16 ; unaffected 5.10.227 ≤ 5.10.* ; unaffected 5.15.168 ≤ 5.15.* ; unaffected 6.1.113 ≤ 6.1.* ; unaffected 6.6.54 ≤ 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