{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2021-47500","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2024-05-22T06:20:56.204Z","datePublished":"2024-05-24T15:01:43.362Z","dateUpdated":"2025-05-04T07:12:22.590Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2025-05-04T07:12:22.590Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\niio: mma8452: Fix trigger reference couting\n\nThe mma8452 driver directly assigns a trigger to the struct iio_dev. The\nIIO core when done using this trigger will call `iio_trigger_put()` to drop\nthe reference count by 1.\n\nWithout the matching `iio_trigger_get()` in the driver the reference count\ncan reach 0 too early, the trigger gets freed while still in use and a\nuse-after-free occurs.\n\nFix this by getting a reference to the trigger before assigning it to the\nIIO device."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/iio/accel/mma8452.c"],"versions":[{"version":"ae6d9ce05691bf79694074db7c7da980080548af","lessThan":"094d513b78b1714113bc016684b8142382e071ba","status":"affected","versionType":"git"},{"version":"ae6d9ce05691bf79694074db7c7da980080548af","lessThan":"fb75cc4740d81264cd5bcb0e17d961d018a8be96","status":"affected","versionType":"git"},{"version":"ae6d9ce05691bf79694074db7c7da980080548af","lessThan":"794c0898f6bf39a458655d5fb4af70ec43a5cfcb","status":"affected","versionType":"git"},{"version":"ae6d9ce05691bf79694074db7c7da980080548af","lessThan":"f5deab10ced368c807866283f8b79144c4823be8","status":"affected","versionType":"git"},{"version":"ae6d9ce05691bf79694074db7c7da980080548af","lessThan":"acf0088ac073ca6e7f4cad6acac112177e08df5e","status":"affected","versionType":"git"},{"version":"ae6d9ce05691bf79694074db7c7da980080548af","lessThan":"db12d95085367de8b0223929d1332731024441f1","status":"affected","versionType":"git"},{"version":"ae6d9ce05691bf79694074db7c7da980080548af","lessThan":"c43517071dfc9fce34f8f69dbb98a86017f6b739","status":"affected","versionType":"git"},{"version":"ae6d9ce05691bf79694074db7c7da980080548af","lessThan":"cd0082235783f814241a1c9483fb89e405f4f892","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/iio/accel/mma8452.c"],"versions":[{"version":"4.2","status":"affected"},{"version":"0","lessThan":"4.2","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":"4.2","versionEndExcluding":"4.4.295"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"4.9.293"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"4.14.258"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"4.19.221"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"5.4.165"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"5.10.85"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"5.15.8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"5.16"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/094d513b78b1714113bc016684b8142382e071ba"},{"url":"https://git.kernel.org/stable/c/fb75cc4740d81264cd5bcb0e17d961d018a8be96"},{"url":"https://git.kernel.org/stable/c/794c0898f6bf39a458655d5fb4af70ec43a5cfcb"},{"url":"https://git.kernel.org/stable/c/f5deab10ced368c807866283f8b79144c4823be8"},{"url":"https://git.kernel.org/stable/c/acf0088ac073ca6e7f4cad6acac112177e08df5e"},{"url":"https://git.kernel.org/stable/c/db12d95085367de8b0223929d1332731024441f1"},{"url":"https://git.kernel.org/stable/c/c43517071dfc9fce34f8f69dbb98a86017f6b739"},{"url":"https://git.kernel.org/stable/c/cd0082235783f814241a1c9483fb89e405f4f892"}],"title":"iio: mma8452: Fix trigger reference couting","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2024-08-04T05:39:59.752Z"},"title":"CVE Program Container","references":[{"url":"https://git.kernel.org/stable/c/094d513b78b1714113bc016684b8142382e071ba","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/fb75cc4740d81264cd5bcb0e17d961d018a8be96","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/794c0898f6bf39a458655d5fb4af70ec43a5cfcb","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/f5deab10ced368c807866283f8b79144c4823be8","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/acf0088ac073ca6e7f4cad6acac112177e08df5e","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/db12d95085367de8b0223929d1332731024441f1","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/c43517071dfc9fce34f8f69dbb98a86017f6b739","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/cd0082235783f814241a1c9483fb89e405f4f892","tags":["x_transferred"]}]},{"metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2021-47500","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2024-09-10T15:35:45.977945Z"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2024-09-11T17:32:52.849Z"}}]}}