CVE-2026-99999critical

CVE-2026-99999: fallo crítico en Linux

ipv4: validate checksum_start before completing checksum

Publicada el · Actualizada el

48Vexday Risk Score

Sin señal de explotación. Ella tiene prueba de concepto pública.

ssvc Attendcvss 9.3epss 0.2%
de la publicación al arma1 días
Publicada en NVD15 oct
1ª PoC+1d
probabilidad de explotación
0.2%top 89% de las CVE
explotación observada
noninguna fuente lo reporta
1 exploit(s) público(s)
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.
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Productos afectados
Linux · Linux
PoCs públicas encontradas — 1
githubgithub.com/MChorfa/csumguard★ 0
⚠ Recursos públicos, para evaluar la exposición de sistemas que controlas o estás autorizado a probar. Prueba solo con autorización.
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Referencias
https://git.kernel.org/stable/c/0fab003ef4698e0628060a45a48f14b43ba2a40ahttps://git.kernel.org/stable/c/32a8b0adaa18e52aaa0b246b5ffe683075354dbbhttps://git.kernel.org/stable/c/6785011f8b16abf40b1e9d8b2e332232b3e68822https://git.kernel.org/stable/c/94524b7b32691de2e2ce162c04d6cbc9106e5cbfhttps://git.kernel.org/stable/c/a464d950f31c89565cbaae038cc60db04fe01956https://git.kernel.org/stable/c/a65f69e0f38ffbed1b128029e09097436416dc8bhttps://git.kernel.org/stable/c/c3e33464746166264334641dc850a36eef7e6326https://git.kernel.org/stable/c/f3e835af6226f1dd12160cbd696081e9b6155de0https://pwn.ai/blog/Pwnescapehttps://vercel.com/blog/findings-from-the-1-million-dollar-vercel-sandbox-challengehttp://www.openwall.com/lists/oss-security/2026/10/15/5