{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-05-13T16:44:05.354","vulnerabilities":[{"cve":{"id":"CVE-2026-23235","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","published":"2026-03-04T15:16:13.977","lastModified":"2026-03-17T21:20:33.457","vulnStatus":"Analyzed","cveTags":[],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix out-of-bounds access in sysfs attribute read/write\n\nSome f2fs sysfs attributes suffer from out-of-bounds memory access and\nincorrect handling of integer values whose size is not 4 bytes.\n\nFor example:\nvm:~# echo 65537 > /sys/fs/f2fs/vde/carve_out\nvm:~# cat /sys/fs/f2fs/vde/carve_out\n65537\nvm:~# echo 4294967297 > /sys/fs/f2fs/vde/atgc_age_threshold\nvm:~# cat /sys/fs/f2fs/vde/atgc_age_threshold\n1\n\ncarve_out maps to {struct f2fs_sb_info}->carve_out, which is a 8-bit\ninteger. However, the sysfs interface allows setting it to a value\nlarger than 255, resulting in an out-of-range update.\n\natgc_age_threshold maps to {struct atgc_management}->age_threshold,\nwhich is a 64-bit integer, but its sysfs interface cannot correctly set\nvalues larger than UINT_MAX.\n\nThe root causes are:\n1. __sbi_store() treats all default values as unsigned int, which\nprevents updating integers larger than 4 bytes and causes out-of-bounds\nwrites for integers smaller than 4 bytes.\n\n2. f2fs_sbi_show() also assumes all default values are unsigned int,\nleading to out-of-bounds reads and incorrect access to integers larger\nthan 4 bytes.\n\nThis patch introduces {struct f2fs_attr}->size to record the actual size\nof the integer associated with each sysfs attribute. With this\ninformation, sysfs read and write operations can correctly access and\nupdate values according to their real data size, avoiding memory\ncorruption and truncation."},{"lang":"es","value":"En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nf2fs: corrige el acceso fuera de límites en la lectura/escritura de atributos sysfs\n\nAlgunos atributos sysfs de f2fs sufren de acceso a memoria fuera de límites y manejo incorrecto de valores enteros cuyo tamaño no es de 4 bytes.\n\nPor ejemplo:\nvm:~# echo 65537 > /sys/fs/f2fs/vde/carve_out\nvm:~# cat /sys/fs/f2fs/vde/carve_out\n65537\nvm:~# echo 4294967297 > /sys/fs/f2fs/vde/atgc_age_threshold\nvm:~# cat /sys/fs/f2fs/vde/atgc_age_threshold\n1\n\ncarve_out se mapea a {struct f2fs_sb_info}->carve_out, que es un entero de 8 bits. Sin embargo, la interfaz sysfs permite establecerlo a un valor mayor que 255, lo que resulta en una actualización fuera de rango.\n\natgc_age_threshold se mapea a {struct atgc_management}->age_threshold, que es un entero de 64 bits, pero su interfaz sysfs no puede establecer correctamente valores mayores que UINT_MAX.\n\nLas causas raíz son:\n1. __sbi_store() trata todos los valores predeterminados como unsigned int, lo que impide actualizar enteros mayores de 4 bytes y causa escrituras fuera de límites para enteros menores de 4 bytes.\n\n2. f2fs_sbi_show() también asume que todos los valores predeterminados son unsigned int, lo que lleva a lecturas fuera de límites y acceso incorrecto a enteros mayores de 4 bytes.\n\nEste parche introduce {struct f2fs_attr}->size para registrar el tamaño real del entero asociado con cada atributo sysfs. Con esta información, las operaciones de lectura y escritura de sysfs pueden acceder y actualizar valores correctamente según su tamaño de datos real, evitando la corrupción de memoria y la truncación."}],"metrics":{"cvssMetricV31":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","baseScore":7.1,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":5.2}]},"weaknesses":[{"source":"nvd@nist.gov","type":"Primary","description":[{"lang":"en","value":"CWE-125"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.12","versionEndExcluding":"5.10.251","matchCriteriaId":"EAFD18CF-3C26-4954-995A-3FEABE1DD30A"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11","versionEndExcluding":"5.15.201","matchCriteriaId":"600A89ED-86F2-48D8-BB7C-5EE7A8832FC5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.16","versionEndExcluding":"6.1.164","matchCriteriaId":"6892F74B-3F14-4500-9652-24A2ECB04144"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"6.6.127","matchCriteriaId":"4A9F36A3-A685-48A0-84B4-6217052BD058"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.7","versionEndExcluding":"6.12.74","matchCriteriaId":"C2968F55-D03F-42BE-A694-F0A37BC8CBE3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.13","versionEndExcluding":"6.18.13","matchCriteriaId":"6BDEF9FB-423E-49F6-991B-9277CC3AF400"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.19","versionEndExcluding":"6.19.3","matchCriteriaId":"7853A337-FB2A-4E19-AB47-4E38343532AA"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/3a905e183c047577b154f08a78ac3039e9454703","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/438a405fbad6882df0e34b3e1a16839a71f04240","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/4ef30b9f1641c9e877792df6b049f1cf507d002d","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/6a6c07a9b49e43f0df42d7118fc76aa555c73d98","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/98ea0039dbfdd00e5cc1b9a8afa40434476c0955","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/d4a594dd952df123cbdcdee9b9640d9d55e4a954","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/e85a99db9ab85dfc30d93b0ca0e9156f3127f55a","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/eebd72cff518ac87e660aefb8a41224bd88c32ce","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]}]}}]}