protect the fetch of ->fd[fd] in do_dup2() from mispredictions (Linux Linux)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.28 % · percentile 20 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- 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.
References
- https://git.kernel.org/stable/c/ed42e8ff509d2a61c6642d1825032072dab79f26
- https://git.kernel.org/stable/c/41a6c31df77bd8e050136b0a200b537da9e1084a
- https://git.kernel.org/stable/c/08775b3d6ed117cf4518754ec7300ee42b6a5368
- https://git.kernel.org/stable/c/3f480493550b6a23d3a65d095d6569d4a7f56a0f
- https://git.kernel.org/stable/c/5db999fff545b924b24c9afd368ef5c17279b176
- https://git.kernel.org/stable/c/da72e783afd27d9f487836b2e6738146c0edd149
- https://git.kernel.org/stable/c/1171ceccabfd596ca370c5d2cbb47d110c3f2fe1
- https://git.kernel.org/stable/c/8aa37bde1a7b645816cda8b80df4753ecf172bf1
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
- https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | MEDIUM 5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H | NVD · nvd@nist.gov (Primary) |
European references
- ENISA EUVD · EUVD-2024-39488
- GCVE · GCVE-0-2024-42265
CERT-FR advisories
- CERTFR-2026-AVI-1165 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0841 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0827 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0723 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0253 — Multiples vulnérabilités dans le noyau Linux de Red Hat · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0022 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0002 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
- CERTFR-2024-AVI-1080 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2024-AVI-1013 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0997 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0957 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0872 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0870 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*< 4.19.320cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 4.20 < 5.4.282cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.5 < 5.10.224cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.11 < 5.15.165cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.16 < 6.1.104cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.2 < 6.6.45cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.7 < 6.10.4cpe:2.3:o:linux:linux_kernel:6.11:rc1:*:*:*:*:*:*
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected 8280d16172243702ed43432f826ca6130edb4086 < ed42e8ff509d2a61c6642d1825032072dab79f26 ; affected 8280d16172243702ed43432f826ca6130edb4086 < 41a6c31df77bd8e050136b0a200b537da9e1084a ; affected 8280d16172243702ed43432f826ca6130edb4086 < 08775b3d6ed117cf4518754ec7300ee42b6a5368 ; affected 8280d16172243702ed43432f826ca6130edb4086 < 3f480493550b6a23d3a65d095d6569d4a7f56a0f ; affected 8280d16172243702ed43432f826ca6130edb4086 < 5db999fff545b924b24c9afd368ef5c17279b176 ; affected 8280d16172243702ed43432f826ca6130edb4086 < da72e783afd27d9f487836b2e6738146c0edd149 |
| Linux · Linux | affected 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
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |