CVE-2026-99999Published

ipv4: validate checksum_start before completing checksum

Exact source revision recorded 24 Oct 2026 16:17:04 UTC. It does not establish the source's current position. Latest evidence.

Recorded JSON

cve-program · CVE-2026-99999

Published

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.

Source published: 15 Oct 2026 12:19:22 UTC
Source modified: 24 Oct 2026 14:17:15 UTC
Observed here: 24 Oct 2026 16:17:04 UTC
Source terms: CVE Program Terms of Use

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CVSS 3.1 · 9.3 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H