SB20261022469 - Integer overflow in Linux kernel packet

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Main Vulnerability Database SB20261022469

SB20261022469 - Integer overflow in Linux kernel packet

Published: October 22, 2026

Security Bulletin ID SB20261022469
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Integer overflow (CVE-ID: CVE-2026-98850)

CWE-ID: CWE-190 - Integer overflow

CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a local user to cause a denial of service by triggering a kernel BUG.

The vulnerability exists due to integer overflow in the Linux kernel's tpacket_snd() function when accumulating transmitted packet lengths during a blocking TX_RING send call. A local user can use CAP_NET_RAW to submit packets while concurrently recycling completed frames, causing the signed byte count to wrap to -EIOCBQUEUED and trigger a BUG in sock_sendmsg_nosec().

On systems configured to panic on oops, exploitation can panic the host kernel.


Remediation

Install update from vendor's website.

References