{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-04-23T12:13:43.352","vulnerabilities":[{"cve":{"id":"CVE-2021-47225","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","published":"2024-05-21T15:15:11.760","lastModified":"2025-04-04T14:31:52.047","vulnStatus":"Analyzed","cveTags":[],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nmac80211: fix deadlock in AP/VLAN handling\n\nSyzbot reports that when you have AP_VLAN interfaces that are up\nand close the AP interface they belong to, we get a deadlock. No\nsurprise - since we dev_close() them with the wiphy mutex held,\nwhich goes back into the netdev notifier in cfg80211 and tries to\nacquire the wiphy mutex there.\n\nTo fix this, we need to do two things:\n 1) prevent changing iftype while AP_VLANs are up, we can't\n    easily fix this case since cfg80211 already calls us with\n    the wiphy mutex held, but change_interface() is relatively\n    rare in drivers anyway, so changing iftype isn't used much\n    (and userspace has to fall back to down/change/up anyway)\n 2) pull the dev_close() loop over VLANs out of the wiphy mutex\n    section in the normal stop case"},{"lang":"es","value":"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: mac80211: corrige el punto muerto en el manejo de AP/VLAN. Syzbot informa que cuando tienes interfaces AP_VLAN activas y cierras la interfaz AP a la que pertenecen, obtenemos un punto muerto. No es de extrañar, ya que los dev_close() los usamos con el mutex wiphy retenido, lo que regresa al notificador netdev en cfg80211 e intenta adquirir el mutex wiphy allí. Para solucionar esto, debemos hacer dos cosas: 1) evitar cambiar iftype mientras las AP_VLAN estén activas, no podemos solucionar fácilmente este caso ya que cfg80211 ya nos llama con el mutex wiphy retenido, pero change_interface() es relativamente raro en los controladores de todos modos , por lo que cambiar iftype no se usa mucho (y el espacio de usuario tiene que volver a bajar/cambiar/arriba de todos modos) 2) extraiga el bucle dev_close() sobre las VLAN de la sección wiphy mutex en el caso de detención normal"}],"metrics":{"cvssMetricV31":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","type":"Secondary","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-667"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.12","versionEndExcluding":"5.12.13","matchCriteriaId":"20B97A76-C4E0-44DF-A13C-08A99794F892"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:5.13:rc1:*:*:*:*:*:*","matchCriteriaId":"0CBAD0FC-C281-4666-AB2F-F8E6E1165DF7"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:5.13:rc2:*:*:*:*:*:*","matchCriteriaId":"96AC23B2-D46A-49D9-8203-8E1BEDCA8532"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:5.13:rc3:*:*:*:*:*:*","matchCriteriaId":"DA610E30-717C-4700-9F77-A3C9244F3BFD"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:5.13:rc4:*:*:*:*:*:*","matchCriteriaId":"1ECD33F5-85BE-430B-8F86-8D7BD560311D"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:5.13:rc5:*:*:*:*:*:*","matchCriteriaId":"CF351855-2437-4CF5-AD7C-BDFA51F27683"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:5.13:rc6:*:*:*:*:*:*","matchCriteriaId":"25A855BA-2118-44F2-90EF-EBBB12AF51EF"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/8043903fcb72f545c52e3ec74d6fd82ef79ce7c5","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/d5befb224edbe53056c2c18999d630dafb4a08b9","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/8043903fcb72f545c52e3ec74d6fd82ef79ce7c5","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/d5befb224edbe53056c2c18999d630dafb4a08b9","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch"]}]}}]}