{"id":"CVE-2022-49220","title":"dax: make sure inodes are flushed before destroy cache","summary":"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_c…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 7b6be8444e0f0dd675b54d059793423d3c9b4c03 < 770d42fff12d8595adda9025a0b92091f543e775","Linux >= 7b6be8444e0f0dd675b54d059793423d3c9b4c03 < ec376f5c11c88c0215d173599db8449cd4196759","Linux >= 7b6be8444e0f0dd675b54d059793423d3c9b4c03 < e2951eaa9398415ac054b7bd80b8163b6838ead4","Linux >= 7b6be8444e0f0dd675b54d059793423d3c9b4c03 < f2a1e0eb70c2d954176c07d75d28742bde30e9f3","Linux >= 7b6be8444e0f0dd675b54d059793423d3c9b4c03 < b786abe7c67c6ef71410c8e23292b3091d616ad1","Linux >= 7b6be8444e0f0dd675b54d059793423d3c9b4c03 < a7e8de822e0b1979f08767c751f6c8a9c1d4ad86","Linux 4.12"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-05T19:44:40.008228Z"},"published":"2025-02-26","updated":"2026-11-05","sourceUpdated":"2026-11-05T19:49:37.552Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2022-49220","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"}],"tags":["cve.org"],"epss":0.00269,"epssPercentile":0.19244,"ingestedAt":"2026-11-05T22:38:31.567Z","slug":"CVE-2022-49220","body":"## Overview\n\nIn 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.\n\n## Affected\n\n- `Linux >= 7b6be8444e0f0dd675b54d059793423d3c9b4c03 < 770d42fff12d8595adda9025a0b92091f543e775`\n- `Linux >= 7b6be8444e0f0dd675b54d059793423d3c9b4c03 < ec376f5c11c88c0215d173599db8449cd4196759`\n- `Linux >= 7b6be8444e0f0dd675b54d059793423d3c9b4c03 < e2951eaa9398415ac054b7bd80b8163b6838ead4`\n- `Linux >= 7b6be8444e0f0dd675b54d059793423d3c9b4c03 < f2a1e0eb70c2d954176c07d75d28742bde30e9f3`\n- `Linux >= 7b6be8444e0f0dd675b54d059793423d3c9b4c03 < b786abe7c67c6ef71410c8e23292b3091d616ad1`\n- `Linux >= 7b6be8444e0f0dd675b54d059793423d3c9b4c03 < a7e8de822e0b1979f08767c751f6c8a9c1d4ad86`\n- `Linux 4.12`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}