CVE-2022-49220

dax: make sure inodes are flushed before destroy cache

MEDIUM

5.5

CVSS Score

Published: February 26, 2025 at 01:55 AM UTC

Updated: June 17, 2026 at 05:17 AM UTC

1 product affected across 1 vendorLinux Kernel

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Severity

MEDIUM5.5

Exploit prediction

EPSS 0.3%

Description

In the Linux kernel, the following vulnerability has been resolved: dax: make sure inodes are flushed before destroy cache A bug can be triggered by following command $ modprobe nd_pmem && modprobe -r nd_pmem [ 10.060014] BUG dax_cache (Not tainted): Objects remaining in dax_cache on __kmem_cache_shutdown() [ 10.060938] Slab 0x0000000085b729ac objects=9 used=1 fp=0x000000004f5ae469 flags=0x200000000010200(slab|head|node) [ 10.062433] Call Trace: [ 10.062673] dump_stack_lvl+0x34/0x44 [ 10.062865] slab_err+0x90/0xd0 [ 10.063619] __kmem_cache_shutdown+0x13b/0x2f0 [ 10.063848] kmem_cache_destroy+0x4a/0x110 [ 10.064058] __x64_sys_delete_module+0x265/0x300 This is caused by dax_fs_exit() not flushing inodes before destroy cache. To fix this issue, call rcu_barrier() before destroy cache.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel · Linux

95%

4.12 ≤ v < 5.10.1104.12 ≤ v < 5.15.334.12 ≤ v < 5.16.194.12 ≤ v < 5.17.24.12 ≤ v < 5.184.12 ≤ v < 5.4.1895.11 ≤ v < 5.15.335.16 ≤ v < 5.16.195.17 ≤ v < 5.17.25.5 ≤ v < 5.10.1104.127b6be8444e0f0dd675b54d059793423d3c9b4c03

Vendor states this is fixed in 770d42fff12d8595adda9025a0b92091f543e775 (fixed)

Vendor states this is fixed in a7e8de822e0b1979f08767c751f6c8a9c1d4ad86 (fixed)

Vendor states this is fixed in b786abe7c67c6ef71410c8e23292b3091d616ad1 (fixed)

Vendor states this is fixed in e2951eaa9398415ac054b7bd80b8163b6838ead4 (fixed)

Vendor states this is fixed in ec376f5c11c88c0215d173599db8449cd4196759 (fixed)

Vendor states this is fixed in f2a1e0eb70c2d954176c07d75d28742bde30e9f3 (fixed)

Vendor states this is fixed in 4.12 (unaffected)

Vendor states this is fixed in 5.10.110 (unaffected)

Vendor states this is fixed in 5.15.33 (unaffected)

Vendor states this is fixed in 5.16.19 (unaffected)

Vendor states this is fixed in 5.17.2 (unaffected)

Vendor states this is fixed in 5.18 (unaffected)