proc: protect ptrace_may_access() with exec_update_lock (FD links) (Linux Linux)

CVE-2026-64375
HIGH 7.8

En bref

Source
NVD
EPSS
EPSS 0.10 % · centile 1 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Modified

Description

In the Linux kernel, the following vulnerability has been resolved: proc: protect ptrace_may_access() with exec_update_lock (FD links) proc_pid_get_link() and proc_pid_readlink() currently look up the task from the pid once, then do the ptrace access check on that task, then look up the task from the pid a second time to do the actual access. That's racy in several ways. To fix it, pass the task to the ->proc_get_link() handler, and instead of proc_fd_access_allowed(), introduce a new helper call_proc_get_link() that looks up and locks the task, does the access check, and calls ->proc_get_link().

Faiblesses (CWE)

  • CWE-362 — Situation de compétition

Références

Scores

VersionScoreVecteurÉvalué par
CVSS 3.1HIGH 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HLinux
CVSS 3.1HIGH 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HNVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary)

Références européennes

Avis du CERT-FR

Configurations affectées (CPE NVD)

Produits affectés

ProduitVersions
Linux · Linuxaffected 778c1144771f0064b6f51bee865cceb0d996f2f9 < 6253dfee5afba536bb54fc6fe6c091c3758fafe1 ; affected 778c1144771f0064b6f51bee865cceb0d996f2f9 < 65bf0d2b6e914f1448d6a2fde193dcf60936a651 ; affected 778c1144771f0064b6f51bee865cceb0d996f2f9 < de497d7aa2fae453a7e7c8f7d3e8682e565e3aaf ; affected 778c1144771f0064b6f51bee865cceb0d996f2f9 < 138c692d2b2d63d26f2eb957d0e4fcc5d61f9ff2 ; affected 778c1144771f0064b6f51bee865cceb0d996f2f9 < 83b17872e3166c295c599279fc9562ac3840c638 ; affected 778c1144771f0064b6f51bee865cceb0d996f2f9 < 497c6bae5167428596575f20af6613ff5671f383
Linux · Linuxaffected 2.6.18 ; unaffected 0 < 2.6.18 ; unaffected 5.10.261 ≤ 5.10.* ; unaffected 5.15.212 ≤ 5.15.* ; unaffected 6.1.178 ≤ 6.1.* ; unaffected 6.6.145 ≤ 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