{"id":"CVE-2021-47357","state":"PUBLISHED","title":"atm: iphase: fix possible use-after-free in ia_module_exit()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\natm: iphase: fix possible use-after-free in ia_module_exit()\n\nThis module's remove path calls del_timer(). However, that function\ndoes not wait until the timer handler finishes. This means that the\ntimer handler may still be running after the driver's remove function\nhas finished, which would result in a use-after-free.\n\nFix by calling del_timer_sync(), which makes sure the timer handler\nhas finished, and unable to re-schedule itself.","publishedAt":"2024-05-21T14:35:59.761Z","updatedAt":"2026-05-11T13:53:08.602Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","status":"affected","lessThan":"9e161687855175334ca93c6c3ccb221731194479","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","status":"affected","lessThan":"a832ee2f2145f57443b2d565f8cb5490e8339f42","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","status":"affected","lessThan":"bcdd2be48edd8c6867fb44112cb8d18086beae29","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","status":"affected","lessThan":"89ce0b0747f319eb70f85bc820dcc43cebbd5417","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","status":"affected","lessThan":"c9172498d4d62c9b64e5fb37c1ee0343e65fe51b","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","status":"affected","lessThan":"e759ff76ebbbfcdcf83b6634c54dc47828573d8b","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","status":"affected","lessThan":"b58d246a058ae88484758cd4ab27b3180fd5ecf8","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","status":"affected","lessThan":"d1fb12412874c94ad037e11d0ecdd1140a439297","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","status":"affected","lessThan":"1c72e6ab66b9598cac741ed397438a52065a8f1f","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/atm/iphase.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.12","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.12","versionType":"semver"},{"version":"4.4.276","status":"unaffected","lessThanOrEqual":"4.4.*","versionType":"semver"},{"version":"4.9.276","status":"unaffected","lessThanOrEqual":"4.9.*","versionType":"semver"},{"version":"4.14.240","status":"unaffected","lessThanOrEqual":"4.14.*","versionType":"semver"},{"version":"4.19.198","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.133","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.51","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.12.18","status":"unaffected","lessThanOrEqual":"5.12.*","versionType":"semver"},{"version":"5.13.3","status":"unaffected","lessThanOrEqual":"5.13.*","versionType":"semver"},{"version":"5.14","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/atm/iphase.c"]}],"references":["https://git.kernel.org/stable/c/9e161687855175334ca93c6c3ccb221731194479","https://git.kernel.org/stable/c/a832ee2f2145f57443b2d565f8cb5490e8339f42","https://git.kernel.org/stable/c/bcdd2be48edd8c6867fb44112cb8d18086beae29","https://git.kernel.org/stable/c/89ce0b0747f319eb70f85bc820dcc43cebbd5417","https://git.kernel.org/stable/c/c9172498d4d62c9b64e5fb37c1ee0343e65fe51b","https://git.kernel.org/stable/c/e759ff76ebbbfcdcf83b6634c54dc47828573d8b","https://git.kernel.org/stable/c/b58d246a058ae88484758cd4ab27b3180fd5ecf8","https://git.kernel.org/stable/c/d1fb12412874c94ad037e11d0ecdd1140a439297","https://git.kernel.org/stable/c/1c72e6ab66b9598cac741ed397438a52065a8f1f"],"weaknesses":[],"ingestedAt":"2026-10-29T19:49:19.404Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2021/47xxx/CVE-2021-47357.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2021-47357","state":"PUBLISHED","datePublished":"2024-05-21T14:35:59.761Z","dateUpdated":"2026-05-11T13:53:08.602Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-05-21T14:28:16.987Z"},"containers":{"cna":{"title":"atm: iphase: fix possible use-after-free in ia_module_exit()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\natm: iphase: fix possible use-after-free in ia_module_exit()\n\nThis module's remove path calls del_timer(). However, that function\ndoes not wait until the timer handler finishes. 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