{"id":"CVE-2021-47088","state":"PUBLISHED","title":"mm/damon/dbgfs: protect targets destructions with kdamond_lock","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmm/damon/dbgfs: protect targets destructions with kdamond_lock\n\nDAMON debugfs interface iterates current monitoring targets in\n'dbgfs_target_ids_read()' while holding the corresponding\n'kdamond_lock'.  However, it also destructs the monitoring targets in\n'dbgfs_before_terminate()' without holding the lock.  This can result in\na use_after_free bug.  This commit avoids the race by protecting the\ndestruction with the corresponding 'kdamond_lock'.","publishedAt":"2024-03-04T18:10:26.511Z","updatedAt":"2026-05-11T13:47:48.778Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"4bc05954d0076655cfaf6f0135585bdc20cd6b11","status":"affected","lessThan":"330c6117a82c16a9a365a51cec5c9ab30b13245c","versionType":"git"},{"version":"4bc05954d0076655cfaf6f0135585bdc20cd6b11","status":"affected","lessThan":"34796417964b8d0aef45a99cf6c2d20cebe33733","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["mm/damon/dbgfs.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.15","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.15","versionType":"semver"},{"version":"5.15.12","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"5.16","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["mm/damon/dbgfs.c"]}],"references":["https://git.kernel.org/stable/c/330c6117a82c16a9a365a51cec5c9ab30b13245c","https://git.kernel.org/stable/c/34796417964b8d0aef45a99cf6c2d20cebe33733"],"weaknesses":[],"ingestedAt":"2026-10-29T19:49:19.404Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2021/47xxx/CVE-2021-47088.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2021-47088","state":"PUBLISHED","datePublished":"2024-03-04T18:10:26.511Z","dateUpdated":"2026-05-11T13:47:48.778Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-02-29T22:33:44.299Z"},"containers":{"cna":{"title":"mm/damon/dbgfs: protect targets destructions with kdamond_lock","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nmm/damon/dbgfs: protect targets destructions with kdamond_lock\n\nDAMON debugfs interface iterates current monitoring targets in\n'dbgfs_target_ids_read()' while holding the corresponding\n'kdamond_lock'.  However, it also destructs the monitoring targets in\n'dbgfs_before_terminate()' without holding the lock.  This can result in\na use_after_free bug.  This commit avoids the race by protecting the\ndestruction with the corresponding 'kdamond_lock'."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"4bc05954d0076655cfaf6f0135585bdc20cd6b11","status":"affected","lessThan":"330c6117a82c16a9a365a51cec5c9ab30b13245c","versionType":"git"},{"version":"4bc05954d0076655cfaf6f0135585bdc20cd6b11","status":"affected","lessThan":"34796417964b8d0aef45a99cf6c2d20cebe33733","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["mm/damon/dbgfs.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.15","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.15","versionType":"semver"},{"version":"5.15.12","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"5.16","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["mm/damon/dbgfs.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/330c6117a82c16a9a365a51cec5c9ab30b13245c"},{"url":"https://git.kernel.org/stable/c/34796417964b8d0aef45a99cf6c2d20cebe33733"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T13:47:48.778Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"5.15.12"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"5.16"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://git.kernel.org/stable/c/330c6117a82c16a9a365a51cec5c9ab30b13245c","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/34796417964b8d0aef45a99cf6c2d20cebe33733","tags":["x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-04T05:24:39.821Z"}},{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2021-47088","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2024-09-10T15:56:11.291300Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2024-09-11T17:33:34.176Z"}}]}}}