{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-04-15T09:17:16.123","vulnerabilities":[{"cve":{"id":"CVE-2021-47646","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","published":"2025-02-26T06:37:06.390","lastModified":"2025-03-24T17:46:46.093","vulnStatus":"Analyzed","cveTags":[],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nRevert \"Revert \"block, bfq: honor already-setup queue merges\"\"\n\nA crash [1] happened to be triggered in conjunction with commit\n2d52c58b9c9b (\"block, bfq: honor already-setup queue merges\"). The\nlatter was then reverted by commit ebc69e897e17 (\"Revert \"block, bfq:\nhonor already-setup queue merges\"\"). Yet, the reverted commit was not\nthe one introducing the bug. In fact, it actually triggered a UAF\nintroduced by a different commit, and now fixed by commit d29bd41428cf\n(\"block, bfq: reset last_bfqq_created on group change\").\n\nSo, there is no point in keeping commit 2d52c58b9c9b (\"block, bfq:\nhonor already-setup queue merges\") out. This commit restores it.\n\n[1] https:\/\/bugzilla.kernel.org\/show_bug.cgi?id=214503"},{"lang":"es","value":"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: Revert \"Revert \"block, bfq: respetar las fusiones de colas ya configuradas\"\" Se produjo un fallo [1] junto con la confirmación 2d52c58b9c9b (\"block, bfq: respetar las fusiones de colas ya configuradas\"). Esta última se revirtió mediante la confirmación ebc69e897e17 (\"Revert \"block, bfq: respetar las fusiones de colas ya configuradas\"\"). Sin embargo, la confirmación revertida no fue la que introdujo el error. De hecho, activó una UAF introducida por una confirmación diferente, y ahora corregida por la confirmación d29bd41428cf (\"block, bfq: restablecer last_bfqq_created al cambiar de grupo\"). Por lo tanto, no tiene sentido mantener la confirmación 2d52c58b9c9b (\"block, bfq: respetar las fusiones de colas ya configuradas\"). Esta confirmación la restaura. [1] https:\/\/bugzilla.kernel.org\/show_bug.cgi?id=214503"}],"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:H\/I:H\/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":5.9}]},"weaknesses":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","type":"Secondary","description":[{"lang":"en","value":"CWE-416"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"4.19.238","matchCriteriaId":"E0B62342-F287-4C6B-92AA-C1BC61DDAFFA"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"5.4.189","matchCriteriaId":"8CB6E8F5-C2B1-46F3-A807-0F6104AC340F"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"5.10.110","matchCriteriaId":"91D3BFD0-D3F3-4018-957C-96CCBF357D79"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11","versionEndExcluding":"5.15.33","matchCriteriaId":"27C42AE8-B387-43E2-938A-E1C8B40BE6D5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.16","versionEndExcluding":"5.16.19","matchCriteriaId":"20C43679-0439-405A-B97F-685BEE50613B"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.17","versionEndExcluding":"5.17.2","matchCriteriaId":"210C679C-CF84-44A3-8939-E629C87E54BF"}]}]}],"references":[{"url":"https:\/\/git.kernel.org\/stable\/c\/15729ff8143f8135b03988a100a19e66d7cb7ecd","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https:\/\/git.kernel.org\/stable\/c\/4083925bd6dc89216d156474a8076feec904e607","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https:\/\/git.kernel.org\/stable\/c\/65d8a737452e88f251fe5d925371de6d606df613","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https:\/\/git.kernel.org\/stable\/c\/931aff627469a75c77b9fd3823146d0575afffd6","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https:\/\/git.kernel.org\/stable\/c\/abc2129e646af7b43025d90a071f83043f1ae76c","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https:\/\/git.kernel.org\/stable\/c\/cc051f497eac9d8a0d816cd4bffa3415f2724871","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https:\/\/git.kernel.org\/stable\/c\/f990f0985eda59d4f29fc83fcf300c92b1225d39","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]}]}}]}