CVE-2026-99999

CVE Details

Release Date:	2026-10-15
Impact:	Important	What is this?

Description

In the Linux kernel, the following vulnerability has been resolved: ipv4: validate checksum_start before completing checksum If a packet with bad checksum metadata gets into the ipv4 stack, skb_checksum_help can corrupt the network header and cause a bunch of mischief. This was discovered and reported by Paulos, and has been reporoduced by others independently since. We really shouldn't allow such packets in, but as a defence in depth measure, let's also check before we complete the checksum. A more complete validation at input is forthcoming, but needs more work.

See more information about CVE-2026-99999 from MITRE CVE dictionary and NIST NVD

NOTE: The following CVSS metrics and score provided are preliminary and subject to review.

CVSS v3 metrics

Base Score:	8.8
Vector String:	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Version:	3.1
Attack Vector:	Local
Attack Complexity:	Low
Privileges Required:	Low
User Interaction:	None
Scope:	Changed
Confidentiality Impact:	High
Integrity Impact:	High
Availability Impact:	High

Errata information

Platform	Errata	Release Date
Oracle Linux version 10 (kernel-uek)	ELSA-2026-500399	2026-10-16
Oracle Linux version 7 (kernel-uek)	ELSA-2026-500397	2026-10-16
Oracle Linux version 8 (kernel-uek)	ELSA-2026-500397	2026-10-16
Oracle Linux version 8 (kernel-uek)	ELSA-2026-500398	2026-10-16
Oracle Linux version 9 (kernel-uek)	ELSA-2026-500398	2026-10-16
Oracle Linux version 9 (kernel-uek)	ELSA-2026-500399	2026-10-16