CVE-2024-26778
Estado: AnalizadaMedia (5.5)—
En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: fbdev: savage: error si pixclock es igual a cero. El programa de espacio de usuario podría pasar cualquier valor al controlador a través de la interfaz ioctl(). Si el controlador no verifica el valor de pixclock, puede causar un error de división por cero. Aunque pixclock está marcado en savagefb_decode_var(), no está marcado correctamente en savagefb_probe(). Solucione este problema verificando si pixclock es cero en la función savagefb_check_var() antes de usar info->var.pixclock como divisor. Esto es similar a CVE-2022-3061 en i740fb que se solucionó mediante el commit 15cf0b8.
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: 0.25%
- Percentil entre todas las CVEs puntuadas: 16
- Fecha de la puntuación: 8/10/2026
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 (2)
CWE
- CWE-369
Referencias
- https://git.kernel.org/stable/c/04e5eac8f3ab2ff52fa191c187a46d4fdbc1e288
- https://git.kernel.org/stable/c/070398d32c5f3ab0e890374904ad94551c76aec4
- https://git.kernel.org/stable/c/224453de8505aede1890f007be973925a3edf6a1
- https://git.kernel.org/stable/c/512ee6d6041e007ef5bf200c6e388e172a2c5b24
- https://git.kernel.org/stable/c/84dce0f6a4cc5b7bfd7242ef9290db8ac1dd77ff
- https://git.kernel.org/stable/c/8c54acf33e5adaad6374bf3ec1e3aff0591cc8e1
- https://git.kernel.org/stable/c/a9ca4e80d23474f90841251f4ac0d941fa337a01
- https://git.kernel.org/stable/c/bc3c2e58d73b28b9a8789fca84778ee165a72d13
- https://git.kernel.org/stable/c/04e5eac8f3ab2ff52fa191c187a46d4fdbc1e288
- https://git.kernel.org/stable/c/070398d32c5f3ab0e890374904ad94551c76aec4
- https://git.kernel.org/stable/c/224453de8505aede1890f007be973925a3edf6a1
- https://git.kernel.org/stable/c/512ee6d6041e007ef5bf200c6e388e172a2c5b24
- https://git.kernel.org/stable/c/84dce0f6a4cc5b7bfd7242ef9290db8ac1dd77ff
- https://git.kernel.org/stable/c/8c54acf33e5adaad6374bf3ec1e3aff0591cc8e1
- https://git.kernel.org/stable/c/a9ca4e80d23474f90841251f4ac0d941fa337a01
- https://git.kernel.org/stable/c/bc3c2e58d73b28b9a8789fca84778ee165a72d13
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html
- https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html
JSON original (NVD)
Mostrar
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfbdev: savage: Error out if pixclock equals zero\n\nThe userspace program could pass any values to the driver through\nioctl() interface. If the driver doesn't check the value of pixclock,\nit may cause divide-by-zero error.\n\nAlthough pixclock is checked in savagefb_decode_var(), but it is not\nchecked properly in savagefb_probe(). Fix this by checking whether\npixclock is zero in the function savagefb_check_var() before\ninfo->var.pixclock is used as the divisor.\n\nThis is similar to CVE-2022-3061 in i740fb which was fixed by\ncommit 15cf0b8."
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"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: fbdev: savage: error si pixclock es igual a cero. El programa de espacio de usuario podría pasar cualquier valor al controlador a través de la interfaz ioctl(). Si el controlador no verifica el valor de pixclock, puede causar un error de división por cero. Aunque pixclock está marcado en savagefb_decode_var(), no está marcado correctamente en savagefb_probe(). Solucione este problema verificando si pixclock es cero en la función savagefb_check_var() antes de usar info->var.pixclock como divisor. Esto es similar a CVE-2022-3061 en i740fb que se solucionó mediante el commit 15cf0b8."
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