{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-04-17T11:12:12.485","vulnerabilities":[{"cve":{"id":"CVE-2019-15794","sourceIdentifier":"security@ubuntu.com","published":"2020-04-24T00:15:11.933","lastModified":"2024-11-21T04:29:28.880","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"Overlayfs in the Linux kernel and shiftfs, a non-upstream patch to the Linux kernel included in the Ubuntu 5.0 and 5.3 kernel series, both replace vma->vm_file in their mmap handlers. On error the original value is not restored, and the reference is put for the file to which vm_file points. On upstream kernels this is not an issue, as no callers dereference vm_file following after call_mmap() returns an error. However, the aufs patchs change mmap_region() to replace the fput() using a local variable with vma_fput(), which will fput() vm_file, leading to a refcount underflow."},{"lang":"es","value":"Overlayfs en el kernel de Linux y shiftfs, un parche no upstream para el kernel de Linux incluido en las series de kernel Ubuntu versiones 5.0 y 5.3, ambos reemplazan vma->vm_file en sus manejadores de mmap. En el error el valor original no se restaura, y se pone la referencia para el archivo al que apunta vm_file. En los núcleos ascendentes esto no es un problema, ya que ninguna de las llamadas que siguen a vm_file después de call_mmap() devuelve un error. Sin embargo, los parches de aufs cambian mmap_region() para reemplazar el fput() usando una variable local con vma_fput(), la cual fput() vm_file, lo que lleva a un subflujo de recuento."}],"metrics":{"cvssMetricV31":[{"source":"security@ubuntu.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","baseScore":7.1,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":5.2},{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","baseScore":6.7,"baseSeverity":"MEDIUM","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"HIGH","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":0.8,"impactScore":5.9}],"cvssMetricV2":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"2.0","vectorString":"AV:L/AC:L/Au:N/C:C/I:C/A:C","baseScore":7.2,"accessVector":"LOCAL","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"COMPLETE","integrityImpact":"COMPLETE","availabilityImpact":"COMPLETE"},"baseSeverity":"HIGH","exploitabilityScore":3.9,"impactScore":10.0,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}]},"weaknesses":[{"source":"security@ubuntu.com","type":"Secondary","description":[{"lang":"en","value":"CWE-672"}]},{"source":"nvd@nist.gov","type":"Primary","description":[{"lang":"en","value":"CWE-672"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:5.0:*:*:*:*:*:*:*","matchCriteriaId":"D4300F13-DCE3-40B5-9310-313405468D2F"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:5.3:*:*:*:*:*:*:*","matchCriteriaId":"CF8AA5A5-E882-4063-B2BB-C2268685060E"}]}]},{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*","matchCriteriaId":"23A7C53F-B80F-4E6A-AFA9-58EEA84BE11D"},{"vulnerable":true,"criteria":"cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*","matchCriteriaId":"A31C8344-3E02-4EB8-8BD8-4C84B7959624"}]}]}],"references":[{"url":"https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/eoan/commit/?id=270d16ae48a4dbf1c7e25e94cc3e38b4bea37635","source":"security@ubuntu.com","tags":["Mailing List","Patch","Third Party Advisory"]},{"url":"https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/eoan/commit/?id=ef81780548d20a786cc77ed4203fca146fd81ce3","source":"security@ubuntu.com","tags":["Mailing List","Patch","Third Party Advisory"]},{"url":"https://usn.ubuntu.com/usn/usn-4208-1","source":"security@ubuntu.com","tags":["Third Party Advisory"]},{"url":"https://usn.ubuntu.com/usn/usn-4209-1","source":"security@ubuntu.com","tags":["Third Party Advisory"]},{"url":"https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/eoan/commit/?id=270d16ae48a4dbf1c7e25e94cc3e38b4bea37635","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Mailing List","Patch","Third Party Advisory"]},{"url":"https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/eoan/commit/?id=ef81780548d20a786cc77ed4203fca146fd81ce3","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Mailing List","Patch","Third Party Advisory"]},{"url":"https://usn.ubuntu.com/usn/usn-4208-1","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Third Party Advisory"]},{"url":"https://usn.ubuntu.com/usn/usn-4209-1","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Third Party Advisory"]}]}}]}