2 lines
6.5 KiB
JSON
2 lines
6.5 KiB
JSON
{"affected":[{"affectedData":[{"product":"Linux kernel","vendor":"Linux","versions":[{"lessThan":"v5.13-rc4","status":"affected","version":"trunk","versionType":"custom"},{"lessThan":"v5.12.4","status":"affected","version":"linux-5.12.y","versionType":"custom"},{"lessThan":"v5.11.21","status":"affected","version":"linux-5.11.y","versionType":"custom"},{"lessThan":"v5.10.37","status":"affected","version":"linux-5.10.y","versionType":"custom"},{"lessThan":"5.7*","status":"affected","version":"v5.7-rc1","versionType":"custom"}]}],"source":"security@ubuntu.com"}],"configurations":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","matchCriteriaId":"FD815E0C-D654-4F05-B0AE-39939D922E39","versionEndExcluding":"5.10.37","versionStartIncluding":"5.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","matchCriteriaId":"8CBB94EC-EC33-4464-99C5-03E5542715F0","versionEndExcluding":"5.11.21","versionStartIncluding":"5.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","matchCriteriaId":"D8C7052F-1B7B-4327-9C2B-84EBF3243838","versionEndExcluding":"5.12.4","versionStartIncluding":"5.12","vulnerable":true}],"negate":false,"operator":"OR"}]},{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*","matchCriteriaId":"902B8056-9E37-443B-8905-8AA93E2447FB","vulnerable":true},{"criteria":"cpe:2.3:o:canonical:ubuntu_linux:20.10:*:*:*:*:*:*:*","matchCriteriaId":"338B3AAC-C147-4A31-95E7-6E8A6FB4B3FC","vulnerable":true},{"criteria":"cpe:2.3:o:canonical:ubuntu_linux:21.04:*:*:*:*:*:*:*","matchCriteriaId":"8EF1C1CC-3FAE-4DE3-BC41-E5B14D5721F4","vulnerable":true}],"negate":false,"operator":"OR"}]}],"cveTags":[],"descriptions":[{"lang":"en","value":"The io_uring subsystem in the Linux kernel allowed the MAX_RW_COUNT limit to be bypassed in the PROVIDE_BUFFERS operation, which led to negative values being usedin mem_rw when reading /proc/<PID>/mem. This could be used to create a heap overflow leading to arbitrary code execution in the kernel. It was addressed via commit d1f82808877b (\"io_uring: truncate lengths larger than MAX_RW_COUNT on provide buffers\") (v5.13-rc1) and backported to the stable kernels in v5.12.4, v5.11.21, and v5.10.37. It was introduced in ddf0322db79c (\"io_uring: add IORING_OP_PROVIDE_BUFFERS\") (v5.7-rc1)."},{"lang":"es","value":"El subsistema io_uring del kernel de Linux permitía saltarse el límite MAX_RW_COUNT en la operación PROVIDE_BUFFERS, lo que llevaba a utilizar valores negativos en mem_rw al leer /proc//mem. Esto podía utilizarse para crear un desbordamiento de la pila que conducía a la ejecución de código arbitrario en el kernel. Se solucionó mediante el commit d1f82808877b (\"io_uring: truncate lengths larger than MAX_RW_COUNT on provide buffers\") (v5.13-rc1) y se retroalimentó a los kernels estables en versiones v5.12.4, v5.11.21 y v5.10.37. Se introdujo en ddf0322db79c (\"io_uring: add IORING_OP_PROVIDE_BUFFERS\") (v5.7-rc1)."}],"id":"CVE-2021-3491","lastModified":"2026-06-17T04:05:11.890","metrics":{"cvssMetricV2":[{"acInsufInfo":false,"baseSeverity":"HIGH","cvssData":{"accessComplexity":"LOW","accessVector":"LOCAL","authentication":"NONE","availabilityImpact":"COMPLETE","baseScore":7.2,"confidentialityImpact":"COMPLETE","integrityImpact":"COMPLETE","vectorString":"AV:L/AC:L/Au:N/C:C/I:C/A:C","version":"2.0"},"exploitabilityScore":3.9,"impactScore":10.0,"obtainAllPrivilege":false,"obtainOtherPrivilege":false,"obtainUserPrivilege":false,"source":"nvd@nist.gov","type":"Primary","userInteractionRequired":false}],"cvssMetricV31":[{"cvssData":{"attackComplexity":"HIGH","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":7.8,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","version":"3.1"},"exploitabilityScore":1.1,"impactScore":6.0,"source":"security@ubuntu.com","type":"Secondary"},{"cvssData":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":8.8,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","version":"3.1"},"exploitabilityScore":2.0,"impactScore":6.0,"source":"nvd@nist.gov","type":"Primary"}]},"published":"2021-06-04T02:15:07.253","references":[{"source":"security@ubuntu.com","tags":["Patch","Vendor Advisory"],"url":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d1f82808877bb10d3deee7cf3374a4eb3fb582db"},{"source":"security@ubuntu.com","tags":["Third Party Advisory"],"url":"https://security.netapp.com/advisory/ntap-20210716-0004/"},{"source":"security@ubuntu.com","tags":["Third Party Advisory"],"url":"https://ubuntu.com/security/notices/USN-4949-1"},{"source":"security@ubuntu.com","tags":["Third Party Advisory"],"url":"https://ubuntu.com/security/notices/USN-4950-1"},{"source":"security@ubuntu.com","tags":["Mailing List","Patch","Third Party Advisory"],"url":"https://www.openwall.com/lists/oss-security/2021/05/11/13"},{"source":"security@ubuntu.com","tags":["Third Party Advisory","VDB Entry"],"url":"https://www.zerodayinitiative.com/advisories/ZDI-21-589/"},{"source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch","Vendor Advisory"],"url":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d1f82808877bb10d3deee7cf3374a4eb3fb582db"},{"source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Third Party Advisory"],"url":"https://security.netapp.com/advisory/ntap-20210716-0004/"},{"source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Third Party Advisory"],"url":"https://ubuntu.com/security/notices/USN-4949-1"},{"source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Third Party Advisory"],"url":"https://ubuntu.com/security/notices/USN-4950-1"},{"source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Mailing List","Patch","Third Party Advisory"],"url":"https://www.openwall.com/lists/oss-security/2021/05/11/13"},{"source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Third Party Advisory","VDB Entry"],"url":"https://www.zerodayinitiative.com/advisories/ZDI-21-589/"}],"sourceIdentifier":"security@ubuntu.com","vulnStatus":"Modified","weaknesses":[{"description":[{"lang":"en","value":"CWE-131"}],"source":"security@ubuntu.com","type":"Secondary"},{"description":[{"lang":"en","value":"CWE-787"}],"source":"nvd@nist.gov","type":"Primary"}]}
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