CyberSecBulletin
CVE-2024-35937NVD status: Analyzed

Linux: Out-of-bounds Read

Published Updated By the CyberSecBulletin desk

CVE-2024-35937 is a high-severity out-of-bounds read vulnerability in Linux, with a CVSS 3.1 base score of 7.1 out of 10. It can be exploited with local access to the system by an attacker with a low-privileged account, without any action from a user. The record lists versions 9eb3bc0973d084423a6df21cf2c74692ff05647e, 5d7a8585fbb31e88fb2a0f581b70667d3300d1e9, 16da1e1dac23be45ef6e23c41b1508c400e6c544 as the first without the flaw, so updating Linux to one of those releases or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.34% chance of exploitation within 30 days, which is low compared with other CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Update Linux to 9eb3bc0973d084423a6df21cf2c74692ff05647e or 5d7a8585fbb31e88fb2a0f581b70667d3300d1e9 or 16da1e1dac23be45ef6e23c41b1508c400e6c544 or 9ad7974856926129f190ffbe3beea78460b3b7cc, whichever matches your release line, or a later version.
  2. Update Linux Kernel to 6.6.27 or 6.8.6, whichever matches your release line, or a later version.

Affected products and versions

VendorProductAffected versionsFixed in
LinuxLinux966d5c2c22edcc0ab3d519af39f91a29329c979a up to, but not including, 9eb3bc0973d084423a6df21cf2c74692ff05647e; 6e4c0d0460bd32ca9244dff3ba2d2da27235de11 up to, but not including, 5d7a8585fbb31e88fb2a0f581b70667d3300d1e9; 6e4c0d0460bd32ca9244dff3ba2d2da27235de11 up to, but not including, 16da1e1dac23be45ef6e23c41b1508c400e6c544; 6e4c0d0460bd32ca9244dff3ba2d2da27235de11 up to, but not including, 9ad7974856926129f190ffbe3beea78460b3b7cc; 6.39eb3bc0973d084423a6df21cf2c74692ff05647e, 5d7a8585fbb31e88fb2a0f581b70667d3300d1e9, 16da1e1dac23be45ef6e23c41b1508c400e6c544, 9ad7974856926129f190ffbe3beea78460b3b7cc
DebianDebian Linux11.0Not stated
LinuxLinux Kernel6.3 up to, but not including, 6.6.27; 6.7 up to, but not including, 6.8.66.6.27, 6.8.6

Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.

How the severity score breaks down

Attack vector
LocalThe attacker needs local access or must trick a user into running something.
Attack complexity
LowNo special conditions are needed; the attack works reliably.
Privileges required
LowA basic user account is enough.
User interaction
NoneNo action by a victim is required.
Scope
UnchangedImpact stays within the vulnerable component.
Confidentiality
HighAll data handled by the component can be read.
Integrity
NoneNothing can be modified.
Availability
HighThe component can be taken down completely.

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H. Scored by NVD.

Scoring systemScoreSeverityScored by
CVSS 3.18.1HighCNA
CVSS 3.17.1HighNVD

Official description

In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: check A-MSDU format more carefully If it looks like there's another subframe in the A-MSDU but the header isn't fully there, we can end up reading data out of bounds, only to discard later. Make this a bit more careful and check if the subframe header can even be present.

Source: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: Out-of-bounds Read

The product reads data past the end, or before the beginning, of the intended buffer.

How developers prevent this class of flaw

  • Use a language that provides appropriate memory abstractions.

More Out-of-bounds Read vulnerabilities (CWE-125)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: partial).
  3. Record last changed materially (score, affected products, status or references).

References

Third-party and government advisories

Recent Out-of-bounds Read vulnerabilities

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