CVE-2026-43452: fallo de gravedad alta en Linux
netfilter: x_tables: guard option walkers against 1-byte tail reads
Publicada el · Actualizada el
21Vexday Risk Score
Sin señal de explotación. Ningún artefacto público de explotación conocido hasta ahora.
ssvc Trackcvss 8.2epss 0.6%
probabilidad de explotación
0.6%top 51% de las CVE
explotación observada
noninguna fuente lo reporta
In the Linux kernel, the following vulnerability has been resolved:
netfilter: x_tables: guard option walkers against 1-byte tail reads
When the last byte of options is a non-single-byte option kind, walkers
that advance with i += op[i + 1] ? : 1 can read op[i + 1] past the end
of the option area.
Add an explicit i == optlen - 1 check before dereferencing op[i + 1]
in xt_tcpudp and xt_dccp option walkers.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
Productos afectados
Linux · LinuxCVEs relacionadas — Linux
En el mismo producto, de las más peligrosas a las menos.
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Referencias
https://git.kernel.org/stable/c/5b18b8b35c7cded2d17b2b2604c9b0694ff48d1chttps://git.kernel.org/stable/c/9b94f0e42ed248eb31929da84ed9f5310d7ff540https://git.kernel.org/stable/c/ae1e1267650638136b84c23f2b31250f0ccb6823https://git.kernel.org/stable/c/bc18551c6169eac5ed813778d3e3e484002dbbe5https://git.kernel.org/stable/c/c2a445367a496a3c25dbc940c10c8bd1cfd4c14ahttps://git.kernel.org/stable/c/c39f84e4be1be63fc60ca7141ea7b76edcea5907https://git.kernel.org/stable/c/cfe770220ac2dbd3e104c6b45094037455da81d4https://git.kernel.org/stable/c/d04800323336eebf441d153f43234eac9b833d36