CyberSecBulletin
CVE-2026-46198NVD status: Analyzed

Linux: Integer Overflow or Wraparound

Published Updated By the CyberSecBulletin desk

CVE-2026-46198 is a high-severity integer overflow or wraparound vulnerability in Linux, with a CVSS 3.1 base score of 8.8 out of 10. It can be exploited from the same local network by an unauthenticated attacker, without any action from a user. The record lists versions 867cd090760e8f5cd206f387b47ff9c56fac04e9, 10bb1f366d884d506c38a947b43026a75d1afe9a, 96c9c0ed9a9579a9085765aceaa4556a6666eb82 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 867cd090760e8f5cd206f387b47ff9c56fac04e9 or 10bb1f366d884d506c38a947b43026a75d1afe9a or 96c9c0ed9a9579a9085765aceaa4556a6666eb82 or f61499359fa529f0d45a53bf7c573a49eb6322e6, whichever matches your release line, or a later version.
  2. Update Linux Kernel to 5.10.258 or 5.15.209 or 6.1.175 or 6.6.140, whichever matches your release line, or a later version.

Affected products and versions

VendorProductAffected versionsFixed in
LinuxLinuxc6c8fea29769d998d94fcec9b9f14d4b52b349d3 up to, but not including, 867cd090760e8f5cd206f387b47ff9c56fac04e9; c6c8fea29769d998d94fcec9b9f14d4b52b349d3 up to, but not including, 10bb1f366d884d506c38a947b43026a75d1afe9a; c6c8fea29769d998d94fcec9b9f14d4b52b349d3 up to, but not including, 96c9c0ed9a9579a9085765aceaa4556a6666eb82; c6c8fea29769d998d94fcec9b9f14d4b52b349d3 up to, but not including, f61499359fa529f0d45a53bf7c573a49eb6322e6; c6c8fea29769d998d94fcec9b9f14d4b52b349d3 up to, but not including, 974542d1efc48b7e9fe16184e647615cba39969b; c6c8fea29769d998d94fcec9b9f14d4b52b349d3 up to, but not including, bf872db54f91ffe70104b98c20068b2d5910e018; c6c8fea29769d998d94fcec9b9f14d4b52b349d3 up to, but not including, b252797bfced986d6d92ec2f4cfcca842ce8aa78; c6c8fea29769d998d94fcec9b9f14d4b52b349d3 up to, but not including, 0799e5943611006b346b8813c7daf7dd5aa26bfd; and 1 more ranges867cd090760e8f5cd206f387b47ff9c56fac04e9, 10bb1f366d884d506c38a947b43026a75d1afe9a, 96c9c0ed9a9579a9085765aceaa4556a6666eb82, f61499359fa529f0d45a53bf7c573a49eb6322e6, 974542d1efc48b7e9fe16184e647615cba39969b, bf872db54f91ffe70104b98c20068b2d5910e018
LinuxLinux Kernel2.6.38 up to, but not including, 5.10.258; 5.11 up to, but not including, 5.15.209; 5.16 up to, but not including, 6.1.175; 6.2 up to, but not including, 6.6.140; 6.7 up to, but not including, 6.12.90; 6.13 up to, but not including, 6.18.32; 6.19 up to, but not including, 7.0.9; 7.15.10.258, 5.15.209, 6.1.175, 6.6.140, 6.12.90, 6.18.32

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
AdjacentThe attacker must be on the same local network segment.
Attack complexity
LowNo special conditions are needed; the attack works reliably.
Privileges required
NoneNo account or login is needed.
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:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. Scored by CNA.

Official description

In the Linux kernel, the following vulnerability has been resolved: batman-adv: fix integer overflow on buff_pos Fixing an integer overflow present in batadv_iv_ogm_send_to_if. The size check is done using the int type in batadv_iv_ogm_aggr_packet whereas the buff_pos variable uses the s16 type. This could lead to an out-of-bound read.

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

The underlying weakness: Integer Overflow or Wraparound

The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.

How developers prevent this class of flaw

  • Ensure that all protocols are strictly defined, such that all out-of-bounds behavior can be identified simply, and require strict conformance to the protocol.
  • Use a language that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid. If possible, choose a language or compiler that performs automatic bounds checking.
  • Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid. Use libraries or frameworks that make it easier to handle numbers without unexpected consequences. Examples include safe integer handling packages such as SafeInt (C++) or IntegerLib (C or C++).

More Integer Overflow or Wraparound vulnerabilities (CWE-190)

Timeline

  1. CVE record published.
  2. Record last changed materially (score, affected products, status or references).

References

Recent Integer Overflow or Wraparound vulnerabilities

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