CyberSecBulletin
CVE-2024-26594NVD status: Modified

Linux: Out-of-bounds Read

Published Updated By the CyberSecBulletin desk

CVE-2024-26594 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 dd1de9268745f0eac83a430db7afc32cbd62e84b, 6eb8015492bcc84e40646390e50a862b2c0529c9, a2b21ef1ea4cf632d19b3a7cc4d4245b8e63202a 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 51.2% chance of exploitation within 30 days, which is in the top 1.04% of all scored CVEs.

Patch now

Exploitation in the next 30 days is more likely than not, according to EPSS.

What to do

  1. Update Linux to dd1de9268745f0eac83a430db7afc32cbd62e84b or 6eb8015492bcc84e40646390e50a862b2c0529c9 or a2b21ef1ea4cf632d19b3a7cc4d4245b8e63202a or 5e6dfec95833edc54c48605a98365a7325e5541e, whichever matches your release line, or a later version.
  2. Update Linux Kernel to 5.15.149 or 6.1.75 or 6.6.14 or 6.7.2, whichever matches your release line, or a later version.

Affected products and versions

VendorProductAffected versionsFixed in
LinuxLinux0626e6641f6b467447c81dd7678a69c66f7746cf up to, but not including, dd1de9268745f0eac83a430db7afc32cbd62e84b; 0626e6641f6b467447c81dd7678a69c66f7746cf up to, but not including, 6eb8015492bcc84e40646390e50a862b2c0529c9; 0626e6641f6b467447c81dd7678a69c66f7746cf up to, but not including, a2b21ef1ea4cf632d19b3a7cc4d4245b8e63202a; 0626e6641f6b467447c81dd7678a69c66f7746cf up to, but not including, 5e6dfec95833edc54c48605a98365a7325e5541e; 0626e6641f6b467447c81dd7678a69c66f7746cf up to, but not including, 92e470163d96df8db6c4fa0f484e4a229edb903d; 5.15dd1de9268745f0eac83a430db7afc32cbd62e84b, 6eb8015492bcc84e40646390e50a862b2c0529c9, a2b21ef1ea4cf632d19b3a7cc4d4245b8e63202a, 5e6dfec95833edc54c48605a98365a7325e5541e, 92e470163d96df8db6c4fa0f484e4a229edb903d
LinuxLinux Kernelbefore 5.15.149; 5.16.0 up to, but not including, 6.1.75; 6.2.0 up to, but not including, 6.6.14; 6.7.0 up to, but not including, 6.7.25.15.149, 6.1.75, 6.6.14, 6.7.2

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 3.19.1CriticalCNA
CVSS 3.17.1HighNVD

Official description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: validate mech token in session setup If client send invalid mech token in session setup request, ksmbd validate and make the error if it is invalid.

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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