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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2024-42265
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2024-08-17 09:15:07 UTC
Updated2026-05-12 12:17:05 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Problem Types: NVD-CWE-noinfo

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 8280d16172243702ed43432f826ca6130edb4086 ed42e8ff509d2a61c6642d1825032072dab79f26 git Not specified
CNA Linux Linux affected 8280d16172243702ed43432f826ca6130edb4086 41a6c31df77bd8e050136b0a200b537da9e1084a git Not specified
CNA Linux Linux affected 8280d16172243702ed43432f826ca6130edb4086 08775b3d6ed117cf4518754ec7300ee42b6a5368 git Not specified
CNA Linux Linux affected 8280d16172243702ed43432f826ca6130edb4086 3f480493550b6a23d3a65d095d6569d4a7f56a0f git Not specified
CNA Linux Linux affected 8280d16172243702ed43432f826ca6130edb4086 5db999fff545b924b24c9afd368ef5c17279b176 git Not specified
CNA Linux Linux affected 8280d16172243702ed43432f826ca6130edb4086 da72e783afd27d9f487836b2e6738146c0edd149 git Not specified
CNA Linux Linux affected 8280d16172243702ed43432f826ca6130edb4086 1171ceccabfd596ca370c5d2cbb47d110c3f2fe1 git Not specified
CNA Linux Linux affected 8280d16172243702ed43432f826ca6130edb4086 8aa37bde1a7b645816cda8b80df4753ecf172bf1 git Not specified
CNA Linux Linux affected 3.7 Not specified
CNA Linux Linux unaffected 3.7 semver Not specified
CNA Linux Linux unaffected 4.19.320 4.19.* semver Not specified
CNA Linux Linux unaffected 5.4.282 5.4.* semver Not specified
CNA Linux Linux unaffected 5.10.224 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.165 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.104 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.45 6.6.* semver Not specified
CNA Linux Linux unaffected 6.10.4 6.10.* semver Not specified
CNA Linux Linux unaffected 6.11 * original_commit_for_fix Not specified
ADP Siemens SIMATIC S7-1500 TM MFP - GNU/Linux Subsystem affected * custom Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/ed42e8ff509d2a61c6642d1825032072dab79f26 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/41a6c31df77bd8e050136b0a200b537da9e1084a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/5db999fff545b924b24c9afd368ef5c17279b176 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/da72e783afd27d9f487836b2e6738146c0edd149 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/8aa37bde1a7b645816cda8b80df4753ecf172bf1 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
cert-portal.siemens.com/productcert/html/ssa-265688.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
git.kernel.org/stable/c/08775b3d6ed117cf4518754ec7300ee42b6a5368 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/1171ceccabfd596ca370c5d2cbb47d110c3f2fe1 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/3f480493550b6a23d3a65d095d6569d4a7f56a0f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
lists.debian.org/debian-lts-announce/2024/10/msg00003.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org
lists.debian.org/debian-lts-announce/2025/01/msg00001.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org
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