{"id":"CVE-2022-49220","state":"PUBLISHED","title":"dax: make sure inodes are flushed before destroy cache","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndax: make sure inodes are flushed before destroy cache\n\nA bug can be triggered by following command\n\n$ modprobe nd_pmem && modprobe -r nd_pmem\n\n[   10.060014] BUG dax_cache (Not tainted): Objects remaining in dax_cache on __kmem_cache_shutdown()\n[   10.060938] Slab 0x0000000085b729ac objects=9 used=1 fp=0x000000004f5ae469 flags=0x200000000010200(slab|head|node)\n[   10.062433] Call Trace:\n[   10.062673]  dump_stack_lvl+0x34/0x44\n[   10.062865]  slab_err+0x90/0xd0\n[   10.063619]  __kmem_cache_shutdown+0x13b/0x2f0\n[   10.063848]  kmem_cache_destroy+0x4a/0x110\n[   10.064058]  __x64_sys_delete_module+0x265/0x300\n\nThis is caused by dax_fs_exit() not flushing inodes before destroy cache.\nTo fix this issue, call rcu_barrier() before destroy cache.","publishedAt":"2025-02-26T01:55:52.821Z","updatedAt":"2026-05-11T18:55:28.411Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"7b6be8444e0f0dd675b54d059793423d3c9b4c03","status":"affected","lessThan":"770d42fff12d8595adda9025a0b92091f543e775","versionType":"git"},{"version":"7b6be8444e0f0dd675b54d059793423d3c9b4c03","status":"affected","lessThan":"ec376f5c11c88c0215d173599db8449cd4196759","versionType":"git"},{"version":"7b6be8444e0f0dd675b54d059793423d3c9b4c03","status":"affected","lessThan":"e2951eaa9398415ac054b7bd80b8163b6838ead4","versionType":"git"},{"version":"7b6be8444e0f0dd675b54d059793423d3c9b4c03","status":"affected","lessThan":"f2a1e0eb70c2d954176c07d75d28742bde30e9f3","versionType":"git"},{"version":"7b6be8444e0f0dd675b54d059793423d3c9b4c03","status":"affected","lessThan":"b786abe7c67c6ef71410c8e23292b3091d616ad1","versionType":"git"},{"version":"7b6be8444e0f0dd675b54d059793423d3c9b4c03","status":"affected","lessThan":"a7e8de822e0b1979f08767c751f6c8a9c1d4ad86","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/dax/super.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.12","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.12","versionType":"semver"},{"version":"5.4.189","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.110","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.33","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"5.16.19","status":"unaffected","lessThanOrEqual":"5.16.*","versionType":"semver"},{"version":"5.17.2","status":"unaffected","lessThanOrEqual":"5.17.*","versionType":"semver"},{"version":"5.18","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/dax/super.c"]}],"references":["https://git.kernel.org/stable/c/770d42fff12d8595adda9025a0b92091f543e775","https://git.kernel.org/stable/c/ec376f5c11c88c0215d173599db8449cd4196759","https://git.kernel.org/stable/c/e2951eaa9398415ac054b7bd80b8163b6838ead4","https://git.kernel.org/stable/c/f2a1e0eb70c2d954176c07d75d28742bde30e9f3","https://git.kernel.org/stable/c/b786abe7c67c6ef71410c8e23292b3091d616ad1","https://git.kernel.org/stable/c/a7e8de822e0b1979f08767c751f6c8a9c1d4ad86"],"weaknesses":[],"ingestedAt":"2026-10-29T20:05:26.763Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2022/49xxx/CVE-2022-49220.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2022-49220","state":"PUBLISHED","datePublished":"2025-02-26T01:55:52.821Z","dateUpdated":"2026-05-11T18:55:28.411Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-02-26T01:49:39.292Z"},"containers":{"cna":{"title":"dax: make sure inodes are flushed before destroy cache","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndax: make sure inodes are flushed before destroy cache\n\nA bug can be triggered by following command\n\n$ modprobe nd_pmem && modprobe -r nd_pmem\n\n[   10.060014] BUG dax_cache (Not tainted): Objects remaining in dax_cache on __kmem_cache_shutdown()\n[   10.060938] Slab 0x0000000085b729ac objects=9 used=1 fp=0x000000004f5ae469 flags=0x200000000010200(slab|head|node)\n[   10.062433] Call Trace:\n[   10.062673]  dump_stack_lvl+0x34/0x44\n[   10.062865]  slab_err+0x90/0xd0\n[   10.063619]  __kmem_cache_shutdown+0x13b/0x2f0\n[   10.063848]  kmem_cache_destroy+0x4a/0x110\n[   10.064058]  __x64_sys_delete_module+0x265/0x300\n\nThis is caused by dax_fs_exit() not flushing inodes before destroy cache.\nTo fix this issue, call rcu_barrier() before destroy cache."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"7b6be8444e0f0dd675b54d059793423d3c9b4c03","status":"affected","lessThan":"770d42fff12d8595adda9025a0b92091f543e775","versionType":"git"},{"version":"7b6be8444e0f0dd675b54d059793423d3c9b4c03","status":"affected","lessThan":"ec376f5c11c88c0215d173599db8449cd4196759","versionType":"git"},{"version":"7b6be8444e0f0dd675b54d059793423d3c9b4c03","status":"affected","lessThan":"e2951eaa9398415ac054b7bd80b8163b6838ead4","versionType":"git"},{"version":"7b6be8444e0f0dd675b54d059793423d3c9b4c03","status":"affected","lessThan":"f2a1e0eb70c2d954176c07d75d28742bde30e9f3","versionType":"git"},{"version":"7b6be8444e0f0dd675b54d059793423d3c9b4c03","status":"affected","lessThan":"b786abe7c67c6ef71410c8e23292b3091d616ad1","versionType":"git"},{"version":"7b6be8444e0f0dd675b54d059793423d3c9b4c03","status":"affected","lessThan":"a7e8de822e0b1979f08767c751f6c8a9c1d4ad86","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/dax/super.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.12","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.12","versionType":"semver"},{"version":"5.4.189","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.110","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.33","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"5.16.19","status":"unaffected","lessThanOrEqual":"5.16.*","versionType":"semver"},{"version":"5.17.2","status":"unaffected","lessThanOrEqual":"5.17.*","versionType":"semver"},{"version":"5.18","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/dax/super.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/770d42fff12d8595adda9025a0b92091f543e775"},{"url":"https://git.kernel.org/stable/c/ec376f5c11c88c0215d173599db8449cd4196759"},{"url":"https://git.kernel.org/stable/c/e2951eaa9398415ac054b7bd80b8163b6838ead4"},{"url":"https://git.kernel.org/stable/c/f2a1e0eb70c2d954176c07d75d28742bde30e9f3"},{"url":"https://git.kernel.org/stable/c/b786abe7c67c6ef71410c8e23292b3091d616ad1"},{"url":"https://git.kernel.org/stable/c/a7e8de822e0b1979f08767c751f6c8a9c1d4ad86"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T18:55:28.411Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"5.4.189"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"5.10.110"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"5.15.33"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"5.16.19"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"5.17.2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"5.18"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}