CyberSecBulletin
CVE-2024-46731NVD status: Modified

Linux: Out-of-bounds Read

Published Updated By the CyberSecBulletin desk

CVE-2024-46731 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 38e32a0d837443c91c4b615a067b976cfb925376, 3317966efcdc5101e93db21514b68917e7eb34ea, 20c6373a6be93039f9d66029bb1e21038a060be1 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 0.24% 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 38e32a0d837443c91c4b615a067b976cfb925376 or 3317966efcdc5101e93db21514b68917e7eb34ea or 20c6373a6be93039f9d66029bb1e21038a060be1 or f1e261ced9bcad772a45a2fcdf413c3490e87299, whichever matches your release line, or a later version.
  2. Update Linux Kernel to 5.10.226 or 5.15.167 or 6.1.109 or 6.6.50, whichever matches your release line, or a later version.

Affected products and versions

VendorProductAffected versionsFixed in
LinuxLinuxc82baa28184356a75c0157129f88af42b2e7b695 up to, but not including, 38e32a0d837443c91c4b615a067b976cfb925376; c82baa28184356a75c0157129f88af42b2e7b695 up to, but not including, 3317966efcdc5101e93db21514b68917e7eb34ea; c82baa28184356a75c0157129f88af42b2e7b695 up to, but not including, 20c6373a6be93039f9d66029bb1e21038a060be1; c82baa28184356a75c0157129f88af42b2e7b695 up to, but not including, f1e261ced9bcad772a45a2fcdf413c3490e87299; c82baa28184356a75c0157129f88af42b2e7b695 up to, but not including, d83fb9f9f63e9a120bf405b078f829f0b2e58934; c82baa28184356a75c0157129f88af42b2e7b695 up to, but not including, 12c6967428a099bbba9dfd247bb4322a984fcc0b; 4.538e32a0d837443c91c4b615a067b976cfb925376, 3317966efcdc5101e93db21514b68917e7eb34ea, 20c6373a6be93039f9d66029bb1e21038a060be1, f1e261ced9bcad772a45a2fcdf413c3490e87299, d83fb9f9f63e9a120bf405b078f829f0b2e58934, 12c6967428a099bbba9dfd247bb4322a984fcc0b
LinuxLinux Kernelbefore 5.10.226; 5.11 up to, but not including, 5.15.167; 5.16 up to, but not including, 6.1.109; 6.2 up to, but not including, 6.6.50; 6.7 up to, but not including, 6.10.95.10.226, 5.15.167, 6.1.109, 6.6.50, 6.10.9

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.

Official description

In the Linux kernel, the following vulnerability has been resolved: drm/amd/pm: fix the Out-of-bounds read warning using index i - 1U may beyond element index for mc_data[] when i = 0.

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

Recent Out-of-bounds Read vulnerabilities

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