CyberSecBulletin
CVE-2024-35963NVD status: Modified

Linux: Improper Validation of Specified Quantity in Input

Published Updated By the CyberSecBulletin desk

CVE-2024-35963 is a high-severity improper validation of specified quantity in input 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 781f3a97a38a338bc893b6db7f9f9670bf1a9e37, 0c18a64039aa3f1c16f208d197c65076da798137, 50173882bb187e70e37bac01385b9b114019bee2 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 781f3a97a38a338bc893b6db7f9f9670bf1a9e37 or 0c18a64039aa3f1c16f208d197c65076da798137 or 50173882bb187e70e37bac01385b9b114019bee2 or b2186061d6043d6345a97100460363e990af0d46, whichever matches your release line, or a later version.
  2. Update Linux Kernel to 6.1.113 or 6.6.55 or 6.8.7, whichever matches your release line, or a later version.

Affected products and versions

VendorProductAffected versionsFixed in
LinuxLinux09572fca7223bcf32c9f0d5e100d8381a81d55f4 up to, but not including, 781f3a97a38a338bc893b6db7f9f9670bf1a9e37; 09572fca7223bcf32c9f0d5e100d8381a81d55f4 up to, but not including, 0c18a64039aa3f1c16f208d197c65076da798137; 09572fca7223bcf32c9f0d5e100d8381a81d55f4 up to, but not including, 50173882bb187e70e37bac01385b9b114019bee2; 09572fca7223bcf32c9f0d5e100d8381a81d55f4 up to, but not including, b2186061d6043d6345a97100460363e990af0d46; 5.16781f3a97a38a338bc893b6db7f9f9670bf1a9e37, 0c18a64039aa3f1c16f208d197c65076da798137, 50173882bb187e70e37bac01385b9b114019bee2, b2186061d6043d6345a97100460363e990af0d46
LinuxLinux Kernel5.16 up to, but not including, 6.1.113; 6.2 up to, but not including, 6.6.55; 6.7 up to, but not including, 6.8.7; 6.96.1.113, 6.6.55, 6.8.7

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 3.17.1HighCNA
CVSS 3.17.1HighNVD

Official description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_sock: Fix not validating setsockopt user input Check user input length before copying data.

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

The underlying weakness: Improper Validation of Specified Quantity in Input

The product receives input that is expected to specify a quantity (such as size or length), but it does not validate or incorrectly validates that the quantity has the required properties.

More Improper Validation of Specified Quantity in Input vulnerabilities (CWE-1284)

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 Improper Validation of Specified Quantity in Input vulnerabilities

Spotted an error? Tell us.