Medium 5.5Published Aug 17, 2024

CVE-2024-42265protect the fetch of ->fd[fd] in do_dup2() from mispredictions

Updated under an hour ago (Oct 26, 2026, 8:10 PM ET)

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Exploited in the last 30 days

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.

CVSS: 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Oct 14, 2026
First seen by InfoSec Signals: Oct 14, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 8280d16172243702ed43432f826ca6130edb4086 before ed42e8ff509d2a61c6642d1825032072dab79f26; 8280d16172243702ed43432f826ca6130edb4086 builds before 41a6c31df77bd8e050136b0a200b537da9e1084a; from 8280d16172243702ed43432f826ca6130edb4086 before 08775b3d6ed117cf4518754ec7300ee42b6a5368; 8280d16172243702ed43432f826ca6130edb4086 builds before 3f480493550b6a23d3a65d095d6569d4a7f56a0f; 8280d16172243702ed43432f826ca6130edb4086 builds before 5db999fff545b924b24c9afd368ef5c17279b176; from 8280d16172243702ed43432f826ca6130edb4086 before da72e783afd27d9f487836b2e6738146c0edd149; 8280d16172243702ed43432f826ca6130edb4086 builds before 1171ceccabfd596ca370c5d2cbb47d110c3f2fe1; 8280d16172243702ed43432f826ca6130edb4086 builds before 8aa37bde1a7b645816cda8b80df4753ecf172bf1	CNA record
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name)	before V1.1.1	CISA ADP
linux linux_kernel linux:linux_kernel	before 4.19.320; from 4.20 before 5.4.282; from 5.5 before 5.10.224; from 5.11 before 5.15.165; from 5.16 before 6.1.104; from 6.2 before 6.6.45; from 6.7 before 6.10.4; 6.11	NVD

References

References

https://git.kernel.org/stable/c/ed42e8ff509d2a61c6642d1825032072dab79f26	patch
https://git.kernel.org/stable/c/41a6c31df77bd8e050136b0a200b537da9e1084a	patch
https://git.kernel.org/stable/c/08775b3d6ed117cf4518754ec7300ee42b6a5368	patch
https://git.kernel.org/stable/c/3f480493550b6a23d3a65d095d6569d4a7f56a0f	patch
https://git.kernel.org/stable/c/5db999fff545b924b24c9afd368ef5c17279b176	patch
https://git.kernel.org/stable/c/da72e783afd27d9f487836b2e6738146c0edd149	patch
https://git.kernel.org/stable/c/1171ceccabfd596ca370c5d2cbb47d110c3f2fe1	patch
https://git.kernel.org/stable/c/8aa37bde1a7b645816cda8b80df4753ecf172bf1	patch
https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html
https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
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The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.