CVE-2026-53249
Estado: ModificadaMedia (5.5)—
In the Linux kernel, the following vulnerability has been resolved:
ipv4: restrict IPOPT_SSRR and IPOPT_LSRR options
This patch restricts setting Loose Source and Record Route (LSRR) and Strict Source and Record Route (SSRR) IP options to users with CAP_NET_RAW capability.
This prevents unprivileged applications from forcing packets to route through attacker-controlled nodes to leak TCP ISN and possibly other protocol information.
While LSRR and SSRR are commonly filtered in many network environments, they may still be supported and forwarded along some network paths.
RFC 7126 (Recommendations on Filtering of IPv4 Packets Containing IPv4 Options) recommend to drop these options in 4.3 and 4.4.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Puntuación base: 5.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.13%
- Percentil entre todas las CVEs puntuadas: 2
- Fecha de la puntuación: 3/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (1)
CWE
- NVD-CWE-noinfo
Referencias
- https://git.kernel.org/stable/c/00e8845fe3428c69e980dce5071cb3da1d8f7578
- https://git.kernel.org/stable/c/28f5ad1b4055405eb1616e603fe511ba5e3725e7
- https://git.kernel.org/stable/c/2a87c3e8f03ce655ed0ef500d64d5fd924ec3691
- https://git.kernel.org/stable/c/4cd6e9ed49347d3a2fdaaf07e32fb524756dddc2
- https://git.kernel.org/stable/c/89343ff12b3178fc236fe531a3603e7c97c68278
- https://git.kernel.org/stable/c/8ff85dbabbbfb05e86e6cde31d91ac5782179d4d
- https://git.kernel.org/stable/c/a4f3fd6516920988c47ba8d19714985c40c816a1
- https://git.kernel.org/stable/c/d3915a1f5a4bc0ac911032903c3c6ab8df9fcc7c
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html
JSON original (NVD)
Mostrar
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv4: restrict IPOPT_SSRR and IPOPT_LSRR options\n\nThis patch restricts setting Loose Source and Record Route (LSRR)\nand Strict Source and Record Route (SSRR) IP options to users\nwith CAP_NET_RAW capability.\n\nThis prevents unprivileged applications from forcing packets to route\nthrough attacker-controlled nodes to leak TCP ISN and possibly other\nprotocol information.\n\nWhile LSRR and SSRR are commonly filtered in many network environments,\nthey may still be supported and forwarded along some network paths.\n\nRFC 7126 (Recommendations on Filtering of IPv4 Packets Containing\nIPv4 Options) recommend to drop these options in 4.3 and 4.4."
}
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