{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-04-30T00:17:53.741","vulnerabilities":[{"cve":{"id":"CVE-2021-47218","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","published":"2024-04-10T19:15:48.860","lastModified":"2025-01-14T14:44:55.610","vulnStatus":"Analyzed","cveTags":[],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nselinux: fix NULL-pointer dereference when hashtab allocation fails\n\nWhen the hash table slot array allocation fails in hashtab_init(),\nh->size is left initialized with a non-zero value, but the h->htable\npointer is NULL. This may then cause a NULL pointer dereference, since\nthe policydb code relies on the assumption that even after a failed\nhashtab_init(), hashtab_map() and hashtab_destroy() can be safely called\non it. Yet, these detect an empty hashtab only by looking at the size.\n\nFix this by making sure that hashtab_init() always leaves behind a valid\nempty hashtab when the allocation fails."},{"lang":"es","value":"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: selinux: corregir la desreferencia de puntero NULL cuando falla la asignación de hashtab Cuando la asignación de la matriz de ranuras de la tabla hash falla en hashtab_init(), h->size se deja inicializado con un valor distinto de cero, pero el puntero h->htable es NULL. Esto puede causar una desreferencia de puntero NULL, ya que el código policydb se basa en la suposición de que incluso después de un hashtab_init() fallido, se pueden llamar hashtab_map() y hashtab_destroy() de forma segura. Sin embargo, estos detectan un hashtab vacío solo mirando el tamaño. Solucione esto asegurándose de que hashtab_init() siempre deje atrás un hashtab vacío válido cuando falla la asignación."}],"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:N/I:N/A:H","baseScore":5.5,"baseSeverity":"MEDIUM","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":3.6}]},"weaknesses":[{"source":"nvd@nist.gov","type":"Primary","description":[{"lang":"en","value":"CWE-476"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.8","versionEndExcluding":"5.10.82","matchCriteriaId":"AB0877E3-6FA0-42C3-8484-EB609F8F6D4B"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11","versionEndExcluding":"5.15.5","matchCriteriaId":"2128A085-4C0C-4C1E-9E9C-0DD868E2170F"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:5.16:rc1:*:*:*:*:*:*","matchCriteriaId":"357AA433-37E8-4323-BFB2-3038D6E4B414"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:5.16:rc2:*:*:*:*:*:*","matchCriteriaId":"A73429BA-C2D9-4D0C-A75F-06A1CA8B3983"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/83c8ab8503adf56bf68dafc7a382f4946c87da79","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/b17dd53cac769dd13031b0ca34f90cc65e523fab","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/dc27f3c5d10c58069672215787a96b4fae01818b","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/83c8ab8503adf56bf68dafc7a382f4946c87da79","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/b17dd53cac769dd13031b0ca34f90cc65e523fab","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/dc27f3c5d10c58069672215787a96b4fae01818b","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch"]}]}}]}