CVEvulnerability
CVE-2026-99999
9.3 CRITICAL
Official page ↗
- Status
- Received
- Published
- 2026-10-15
- Last modified
- 2026-10-19
- Assigner
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
- CVSS 3.1 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)
- 9.3 CRITICAL — CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
- Weaknesses
- CWE-20
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.
Related
Weakness · CWE (1)
- CWE-20 Improper Input Validation weakness
References
- https://git.kernel.org/stable/c/0fab003ef4698e0628060a45a48f14b43ba2a40a git.kernel.org
- https://git.kernel.org/stable/c/32a8b0adaa18e52aaa0b246b5ffe683075354dbb git.kernel.org
- https://git.kernel.org/stable/c/6785011f8b16abf40b1e9d8b2e332232b3e68822 git.kernel.org
- https://git.kernel.org/stable/c/94524b7b32691de2e2ce162c04d6cbc9106e5cbf git.kernel.org
- https://git.kernel.org/stable/c/a464d950f31c89565cbaae038cc60db04fe01956 git.kernel.org
- https://git.kernel.org/stable/c/a65f69e0f38ffbed1b128029e09097436416dc8b git.kernel.org
- https://git.kernel.org/stable/c/c3e33464746166264334641dc850a36eef7e6326 git.kernel.org
- https://git.kernel.org/stable/c/f3e835af6226f1dd12160cbd696081e9b6155de0 git.kernel.org
- https://pwn.ai/blog/pwnescape pwn.ai
- https://vercel.com/blog/findings-from-the-1-million-dollar-vercel-sandbox-challenge vercel.com
- http://www.openwall.com/lists/oss-security/2026/10/15/5 www.openwall.com