{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2021-47509","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2024-05-24T15:02:54.823Z","datePublished":"2024-05-24T15:09:25.349Z","dateUpdated":"2025-12-18T11:37:47.131Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2025-12-18T11:37:47.131Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: pcm: oss: Limit the period size to 16MB\n\nSet the practical limit to the period size (the fragment shift in OSS)\ninstead of a full 31bit; a too large value could lead to the exhaust\nof memory as we allocate temporary buffers of the period size, too.\n\nAs of this patch, we set to 16MB limit, which should cover all use\ncases."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["sound/core/oss/pcm_oss.c"],"versions":[{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"d1bb703ad050de9095f10b2d3416c32921ac6bcc","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"b02a41eebcc36d4f07196780f2e165ca2c499257","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"be55f306396cd62c6889286a7194fd8b53363aeb","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"2e54cf6794bf82a54aaefc78da13819aea9cd28a","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"76f19e4cbb548e28547f8c328aa0bfb3a10222d3","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"ad45babf7886e7a212ee1d5eda9ef49f696db43c","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"35a3e511032146941085f87dd9fb5b82ea5c00a2","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"8839c8c0f77ab8fc0463f4ab8b37fca3f70677c2","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["sound/core/oss/pcm_oss.c"],"versions":[{"version":"2.6.12","status":"affected"},{"version":"0","lessThan":"2.6.12","status":"unaffected","versionType":"semver"},{"version":"4.4.295","lessThanOrEqual":"4.4.*","status":"unaffected","versionType":"semver"},{"version":"4.9.293","lessThanOrEqual":"4.9.*","status":"unaffected","versionType":"semver"},{"version":"4.14.258","lessThanOrEqual":"4.14.*","status":"unaffected","versionType":"semver"},{"version":"4.19.221","lessThanOrEqual":"4.19.*","status":"unaffected","versionType":"semver"},{"version":"5.4.165","lessThanOrEqual":"5.4.*","status":"unaffected","versionType":"semver"},{"version":"5.10.85","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.8","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"5.16","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"4.4.295"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"4.9.293"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"4.14.258"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"4.19.221"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"5.4.165"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"5.10.85"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"5.15.8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"5.16"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/d1bb703ad050de9095f10b2d3416c32921ac6bcc"},{"url":"https://git.kernel.org/stable/c/b02a41eebcc36d4f07196780f2e165ca2c499257"},{"url":"https://git.kernel.org/stable/c/be55f306396cd62c6889286a7194fd8b53363aeb"},{"url":"https://git.kernel.org/stable/c/2e54cf6794bf82a54aaefc78da13819aea9cd28a"},{"url":"https://git.kernel.org/stable/c/76f19e4cbb548e28547f8c328aa0bfb3a10222d3"},{"url":"https://git.kernel.org/stable/c/ad45babf7886e7a212ee1d5eda9ef49f696db43c"},{"url":"https://git.kernel.org/stable/c/35a3e511032146941085f87dd9fb5b82ea5c00a2"},{"url":"https://git.kernel.org/stable/c/8839c8c0f77ab8fc0463f4ab8b37fca3f70677c2"}],"title":"ALSA: pcm: oss: Limit the period size to 16MB","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"problemTypes":[{"descriptions":[{"type":"CWE","lang":"en","description":"CWE-noinfo Not enough information"}]}],"metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":5.5,"attackVector":"LOCAL","baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"LOW","confidentialityImpact":"NONE"}},{"other":{"type":"ssvc","content":{"timestamp":"2024-05-29T17:05:25.970699Z","id":"CVE-2021-47509","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2024-11-07T17:32:21.679Z"}},{"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2024-08-04T05:39:59.773Z"},"title":"CVE Program Container","references":[{"url":"https://git.kernel.org/stable/c/d1bb703ad050de9095f10b2d3416c32921ac6bcc","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/b02a41eebcc36d4f07196780f2e165ca2c499257","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/be55f306396cd62c6889286a7194fd8b53363aeb","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/2e54cf6794bf82a54aaefc78da13819aea9cd28a","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/76f19e4cbb548e28547f8c328aa0bfb3a10222d3","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/ad45babf7886e7a212ee1d5eda9ef49f696db43c","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/35a3e511032146941085f87dd9fb5b82ea5c00a2","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/8839c8c0f77ab8fc0463f4ab8b37fca3f70677c2","tags":["x_transferred"]}]}]}}