CyberSecBulletin
CVE-2024-46759NVD status: Modified

Linux: Integer Underflow (Wrap or Wraparound)

Published Updated By the CyberSecBulletin desk

CVE-2024-46759 is a high-severity integer underflow (wrap or wraparound) vulnerability in Linux, with a CVSS 3.1 base score of 7.8 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 05419d0056dcf7088687e561bb583cc06deba777, 7645d783df23878342d5d8d22030c3861d2d5426, 2a3add62f183459a057336381ef3a896da01ce38 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 0.28% 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 05419d0056dcf7088687e561bb583cc06deba777 or 7645d783df23878342d5d8d22030c3861d2d5426 or 2a3add62f183459a057336381ef3a896da01ce38 or 019ef2d396363ecddc46e826153a842f8603799b, whichever matches your release line, or a later version.
  2. Update SIMATIC S7-1500 TM MFP - GNU/Linux subsystem to V1.1.1 or a later version.
  3. Update RUGGEDCOM RST2428P to V3.2 or a later version.

Affected products and versions

VendorProductAffected versionsFixed in
LinuxLinuxb4c9c1a7987ef07d8345bf9d19f36d97423b6b25 up to, but not including, 05419d0056dcf7088687e561bb583cc06deba777; b4c9c1a7987ef07d8345bf9d19f36d97423b6b25 up to, but not including, 7645d783df23878342d5d8d22030c3861d2d5426; b4c9c1a7987ef07d8345bf9d19f36d97423b6b25 up to, but not including, 2a3add62f183459a057336381ef3a896da01ce38; b4c9c1a7987ef07d8345bf9d19f36d97423b6b25 up to, but not including, 019ef2d396363ecddc46e826153a842f8603799b; b4c9c1a7987ef07d8345bf9d19f36d97423b6b25 up to, but not including, f7f5101af5b47a331cdbfa42ba64c507b47dd1fe; b4c9c1a7987ef07d8345bf9d19f36d97423b6b25 up to, but not including, 6891b11a0c6227ca7ed15786928a07b1c0e4d4af; b4c9c1a7987ef07d8345bf9d19f36d97423b6b25 up to, but not including, b0bdb43852bf7f55ba02f0cbf00b4ea7ca897bff; b4c9c1a7987ef07d8345bf9d19f36d97423b6b25 up to, but not including, 8cad724c8537fe3e0da8004646abc00290adae40; and 1 more ranges05419d0056dcf7088687e561bb583cc06deba777, 7645d783df23878342d5d8d22030c3861d2d5426, 2a3add62f183459a057336381ef3a896da01ce38, 019ef2d396363ecddc46e826153a842f8603799b, f7f5101af5b47a331cdbfa42ba64c507b47dd1fe, 6891b11a0c6227ca7ed15786928a07b1c0e4d4af
SiemensSIMATIC S7-1500 TM MFP - GNU/Linux subsystembefore V1.1.1V1.1.1
SiemensRUGGEDCOM RST2428Pbefore V3.2V3.2
SiemensSCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 familybefore V3.2V3.2
SiemensSCALANCE XCM-/XRM-/XCH-/XRH-300 familybefore V3.2V3.2
LinuxLinux Kernelbefore 4.19.322; 4.20 up to, but not including, 5.4.284; 5.5 up to, but not including, 5.10.226; 5.11 up to, but not including, 5.15.167; 5.16 up to, but not including, 6.1.110; 6.2 up to, but not including, 6.6.51; 6.7 up to, but not including, 6.10.104.19.322, 5.4.284, 5.10.226, 5.15.167, 6.1.110, 6.6.51

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
HighData or code can be modified at will.
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:H/A:H. Scored by NVD.

Official description

In the Linux kernel, the following vulnerability has been resolved: hwmon: (adc128d818) Fix underflows seen when writing limit attributes DIV_ROUND_CLOSEST() after kstrtol() results in an underflow if a large negative number such as -9223372036854775808 is provided by the user. Fix it by reordering clamp_val() and DIV_ROUND_CLOSEST() operations.

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

The underlying weakness: Integer Underflow (Wrap or Wraparound)

The product subtracts one value from another, such that the result is less than the minimum allowable integer value, which produces a value that is not equal to the correct result.

More Integer Underflow (Wrap or Wraparound) vulnerabilities (CWE-191)

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 Integer Underflow (Wrap or Wraparound) vulnerabilities

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