{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-05-10T06:19:33.830","vulnerabilities":[{"cve":{"id":"CVE-2021-47114","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","published":"2024-03-15T21:15:06.723","lastModified":"2025-04-04T14:39:41.120","vulnStatus":"Analyzed","cveTags":[],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nocfs2: fix data corruption by fallocate\n\nWhen fallocate punches holes out of inode size, if original isize is in\nthe middle of last cluster, then the part from isize to the end of the\ncluster will be zeroed with buffer write, at that time isize is not yet\nupdated to match the new size, if writeback is kicked in, it will invoke\nocfs2_writepage()->block_write_full_page() where the pages out of inode\nsize will be dropped.  That will cause file corruption.  Fix this by\nzero out eof blocks when extending the inode size.\n\nRunning the following command with qemu-image 4.2.1 can get a corrupted\ncoverted image file easily.\n\n    qemu-img convert -p -t none -T none -f qcow2 $qcow_image \\\n             -O qcow2 -o compat=1.1 $qcow_image.conv\n\nThe usage of fallocate in qemu is like this, it first punches holes out\nof inode size, then extend the inode size.\n\n    fallocate(11, FALLOC_FL_KEEP_SIZE|FALLOC_FL_PUNCH_HOLE, 2276196352, 65536) = 0\n    fallocate(11, 0, 2276196352, 65536) = 0\n\nv1: https://www.spinics.net/lists/linux-fsdevel/msg193999.html\nv2: https://lore.kernel.org/linux-fsdevel/20210525093034.GB4112@quack2.suse.cz/T/"},{"lang":"es","value":"En el kernel de Linux, se resolvió la siguiente vulnerabilidad: ocfs2: corrige la corrupción de datos por fallocate Cuando fallocate perfora agujeros en el tamaño del inodo, si el isize original está en el medio del último clúster, entonces la parte desde isize hasta el final del clúster se pondrá a cero con la escritura en el búfer, en ese momento isize aún no se ha actualizado para que coincida con el nuevo tamaño, si se activa la reescritura, invocará ocfs2_writepage()->block_write_full_page() donde se eliminarán las páginas fuera del tamaño del inodo. Eso causará corrupción de archivos. Solucione este problema poniendo a cero los bloques eof al extender el tamaño del inodo. Ejecutar el siguiente comando con qemu-image 4.2.1 puede obtener fácilmente un archivo de imagen corrupto y convertido. qemu-img convert -p -t none -T none -f qcow2 $qcow_image \\ -O qcow2 -o compat=1.1 $qcow_image.conv El uso de fallocate en qemu es así, primero perfora agujeros en el tamaño del inodo, luego ampliar el tamaño del inodo. fallocate(11, FALLOC_FL_KEEP_SIZE|FALLOC_FL_PUNCH_HOLE, 2276196352, 65536) = 0 fallocate(11, 0, 2276196352, 65536) = 0 v1: https://www.spinics.net/lists/linux-fsdevel/msg193999.html v2: https //lore.kernel.org/linux-fsdevel/20210525093034.GB4112@quack2.suse.cz/T/"}],"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":"NVD-CWE-noinfo"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"4.4.272","matchCriteriaId":"99854A18-73AB-4333-A59F-D4905B9A977B"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.5","versionEndExcluding":"4.9.272","matchCriteriaId":"8FEC5189-264E-4620-BD41-8B5E44F20D80"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.10","versionEndExcluding":"4.14.236","matchCriteriaId":"32BD3098-E25B-4893-87B7-49DAAD61B503"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.15","versionEndExcluding":"4.19.194","matchCriteriaId":"219AB3A3-BDC8-47F5-A638-4A3D5D451EC3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"5.4.125","matchCriteriaId":"552FBD6A-793D-4EE1-9D44-69978256AA46"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"5.10.43","matchCriteriaId":"B2136BD5-4F86-40C8-96C8-5C90A015490C"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11","versionEndExcluding":"5.12.10","matchCriteriaId":"27384800-AB48-4C08-891E-34B66F5FC4AA"},{"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"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/0a31dd6fd2f4e7db538fb6eb1f06973d81f8dd3b","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/33e03adafb29eedae1bae9cdb50c1385279fcf65","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/624fa7baa3788dc9e57840ba5b94bc22b03cda57","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/6bba4471f0cc1296fe3c2089b9e52442d3074b2e","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/a1700479524bb9cb5e8ae720236a6fabd003acae","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/c8d5faee46242c3f33b8a71a4d7d52214785bfcc","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/cc2edb99ea606a45182b5ea38cc8f4e583aa0774","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/cec4e857ffaa8c447f51cd8ab4e72350077b6770","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/0a31dd6fd2f4e7db538fb6eb1f06973d81f8dd3b","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/33e03adafb29eedae1bae9cdb50c1385279fcf65","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/624fa7baa3788dc9e57840ba5b94bc22b03cda57","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/6bba4471f0cc1296fe3c2089b9e52442d3074b2e","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/a1700479524bb9cb5e8ae720236a6fabd003acae","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/c8d5faee46242c3f33b8a71a4d7d52214785bfcc","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/cc2edb99ea606a45182b5ea38cc8f4e583aa0774","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/cec4e857ffaa8c447f51cd8ab4e72350077b6770","source":"af854a3a-2127-42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