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ptrace: slightly saner 'get_dumpable()' logic (Linux Linux)

CVE-2026-46333
HIGH 7.1

En bref

Source
NVD
EPSS
EPSS 4.30 % · centile 91 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Modified

Rechercher sur…

Description

In the Linux kernel, the following vulnerability has been resolved: ptrace: slightly saner 'get_dumpable()' logic The 'dumpability' of a task is fundamentally about the memory image of the task - the concept comes from whether it can core dump or not - and makes no sense when you don't have an associated mm. And almost all users do in fact use it only for the case where the task has a mm pointer. But we have one odd special case: ptrace_may_access() uses 'dumpable' to check various other things entirely independently of the MM (typically explicitly using flags like PTRACE_MODE_READ_FSCREDS). Including for threads that no longer have a VM (and maybe never did, like most kernel threads). It's not what this flag was designed for, but it is what it is. The ptrace code does check that the uid/gid matches, so you do have to be uid-0 to see kernel thread details, but this means that the traditional "drop capabilities" model doesn't make any difference for this all. Make it all make a *bit* more sense by saying that if you don't have a MM pointer, we'll use a cached "last dumpability" flag if the thread ever had a MM (it will be zero for kernel threads since it is never set), and require a proper CAP_SYS_PTRACE capability to override.

Faiblesses (CWE)

  • CWE-269 — Gestion incorrecte des privilèges

Références

Scores

VersionScoreVecteurÉvalué par
CVSS 3.1HIGH 7.1CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:NLinux
CVSS 3.1HIGH 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hredhat-SADP
CVSS 3.1HIGH 7.1CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:NNVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary)
CVSS 3.1HIGH 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HNVD · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c (Secondary)

Références européennes

Avis du CERT-FR

Configurations affectées (CPE NVD)

Produits affectés

ProduitVersions
Linux · Linuxaffected bfedb589252c01fa505ac9f6f2a3d5d68d707ef4 < 93d4ba49d18e3d7fb41a9927c2d0cca5e9dfefd6 ; affected bfedb589252c01fa505ac9f6f2a3d5d68d707ef4 < 15b828a46f305ae9f05a7c16914b3ce273474205 ; affected bfedb589252c01fa505ac9f6f2a3d5d68d707ef4 < 4709234fd1b95136ceb789f639b1e7ea5de1b181 ; affected bfedb589252c01fa505ac9f6f2a3d5d68d707ef4 < 8f907d345bae8f4b3f004c5abc56bf2dfb851ea7 ; affected bfedb589252c01fa505ac9f6f2a3d5d68d707ef4 < 6e5b51e74a40d377bcd3081dd33fbaa0e1aa7e3d ; affected bfedb589252c01fa505ac9f6f2a3d5d68d707ef4 < 2a93a4fac7b6051d3be7cd1b015fe7320cd0404d
Linux · Linuxaffected 4.10 ; unaffected 0 < 4.10 ; unaffected 5.10.256 ≤ 5.10.* ; unaffected 5.15.207 ≤ 5.15.* ; unaffected 6.1.173 ≤ 6.1.* ; unaffected 6.6.139 ≤ 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