5.5

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

Modified
AliasesUBUNTU-CVE-2024-42265DEBIAN-CVE-2024-42265
Published 17-08-2024Last modified 15-10-2026

Vulnerability summary

CVE-2024-42265 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.28% chance of exploitation in the next 30 days, higher than 20.4% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.28%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 40 · Related 33
DLA-3912-1DLA-4008-1MGASA-2024-0309MGASA-2024-0310RHSA-2024:7000RHSA-2025:3215

Timeline

  1. 17-08-2024
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

0.28%

Chance of exploitation in the next 30 days

Percentile

20%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.28% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu130 products
  • linuxAll versions (No fix recorded) | < 5.4.0-200.220 | < 5.15.0-125.135 | < 6.8.0-50.51
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.4.0-1135.145 | < 5.15.0-1072.78 | < 6.8.0-1020.22
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 8280d16172243702ed43432f826ca6130edb4086, < ed42e8ff509d2a61c6642d1825032072dab79f26 | ≥ 8280d16172243702ed43432f826ca6130edb4086, < 41a6c31df77bd8e050136b0a200b537da9e1084a | ≥ 8280d16172243702ed43432f826ca6130edb4086, < 08775b3d6ed117cf4518754ec7300ee42b6a5368 | ≥ 8280d16172243702ed43432f826ca6130edb4086, < 3f480493550b6a23d3a65d095d6569d4a7f56a0f | ≥ 8280d16172243702ed43432f826ca6130edb4086, < 5db999fff545b924b24c9afd368ef5c17279b176 | ≥ 8280d16172243702ed43432f826ca6130edb4086, < da72e783afd27d9f487836b2e6738146c0edd149 | ≥ 8280d16172243702ed43432f826ca6130edb4086, < 1171ceccabfd596ca370c5d2cbb47d110c3f2fe1 | ≥ 8280d16172243702ed43432f826ca6130edb4086, < 8aa37bde1a7b645816cda8b80df4753ecf172bf1 | 3.7
  • linux_kernel< 4.19.320 | ≥ 4.20, < 5.4.282 | ≥ 5.5, < 5.10.224 | ≥ 5.11, < 5.15.165 | ≥ 5.16, < 6.1.104 | ≥ 6.2, < 6.6.45 | ≥ 6.7, < 6.10.4 | 6.11:rc1
Debian1 product
  • linux< 6.1.106-1 | < 6.10.4-1

3 vendors · 133 products

References

31 links
Show all 31 references