protect the fetch of ->fd[fd] in do_dup2() from mispredictions (Linux Linux)

CVE-2024-42265
MEDIUM 5.5

En bref

Source
NVD
EPSS
EPSS 0.28 % · centile 20 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Modified

Description

In the Linux kernel, the following vulnerability has been resolved: protect the fetch of ->fd[fd] in do_dup2() from mispredictions both callers have verified that fd is not greater than ->max_fds; however, misprediction might end up with tofree = fdt->fd[fd]; being speculatively executed. That's wrong for the same reasons why it's wrong in close_fd()/file_close_fd_locked(); the same solution applies - array_index_nospec(fd, fdt->max_fds) could differ from fd only in case of speculative execution on mispredicted path.

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 8280d16172243702ed43432f826ca6130edb4086 < ed42e8ff509d2a61c6642d1825032072dab79f26 ; affected 8280d16172243702ed43432f826ca6130edb4086 < 41a6c31df77bd8e050136b0a200b537da9e1084a ; affected 8280d16172243702ed43432f826ca6130edb4086 < 08775b3d6ed117cf4518754ec7300ee42b6a5368 ; affected 8280d16172243702ed43432f826ca6130edb4086 < 3f480493550b6a23d3a65d095d6569d4a7f56a0f ; affected 8280d16172243702ed43432f826ca6130edb4086 < 5db999fff545b924b24c9afd368ef5c17279b176 ; affected 8280d16172243702ed43432f826ca6130edb4086 < da72e783afd27d9f487836b2e6738146c0edd149
Linux · Linuxaffected 3.7 ; unaffected 0 < 3.7 ; unaffected 4.19.320 ≤ 4.19.* ; unaffected 5.4.282 ≤ 5.4.* ; unaffected 5.10.224 ≤ 5.10.* ; unaffected 5.15.165 ≤ 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