CVE-2022-49220 [Medium] | Security Vulnerability in Linux Kernel

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.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-15	0.01%	0.25%	+0.24%
2	2026-04-06	0.05%	0.01%	-0.04%
3	2025-12-23	—	0.05%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-15

0.01%

0.25%

+0.24%

2026-04-06

0.05%

0.01%

-0.04%

2025-12-23

—

0.05%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
5.5	3.1	MEDIUM	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H` Click to expand Attack vector (AV:L) They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:L) A normal user session is enough; they don’t have to be admin. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:N) Doesn’t really leak secrets in a meaningful way. Integrity (I:N) Data isn’t meaningfully altered or forged. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	1.8	3.6	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

5.5

3.1

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Click to expand

Attack vector (AV:L): They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L): Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L): A normal user session is enough; they don’t have to be admin.
User interaction (UI:N): Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U): Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N): Doesn’t really leak secrets in a meaningful way.
Integrity (I:N): Data isn’t meaningfully altered or forged.
Availability (A:H): Could take the service down hard or make it unusable for people who depend on it.

1.8

3.6

[email protected]

OS Trackers for CVE-2022-49220

vendor	priority	summary	link
`debian`	not yet assigned	CVE-2022-49220 not yet assigned priority: Debian including 1 source packages (linux), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5.	https://security-tracker.debian.org/tracker/CVE-2022-49220
`redhat`	medium	—	https://access.redhat.com/security/cve/CVE-2022-49220
`suse`	medium	CVE-2022-49220 severity moderate: SUSE including 298 source package names (amazon/suse-sles-15-sp1-chost-byos-v20210304-hvm-ssd-x86_64, amazon/suse-sles-15-sp1-chost-byos-v20220127-hvm-ssd-x86_64, …), 448 product×package rows across 40 product lines (Image SLES12-SP5-Azure-BYOS, Image SLES12-SP5-Azure-HPC-BYOS, … (40 product lines)): Known Affected 231, Known Not Affected 115, Fixed 102.	https://www.suse.com/security/cve/CVE-2022-49220/
`ubuntu`	medium	CVE-2022-49220 medium priority: Ubuntu including 158 source packages (linux, linux-allwinner-5.19, …), 1551 status rows across 10 suites (bionic, focal, jammy, noble, oracular, plucky, questing, trusty, upstream, xenial): DNE 1145, ignored 147, released 129, not-affected 115, needed 15.	https://ubuntu.com/security/CVE-2022-49220

Affected software / configurations for CVE-2022-49220

Vendor	Product	Version	Raw CPE
linux	linux_kernel	>= 4.12, < 5.4.189	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 5.5, < 5.10.110	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 5.11, < 5.15.33	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 5.16, < 5.16.19	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 5.17, < 5.17.2	cpe:2.3:o:linux:linux_kernel::::::::

References for CVE-2022-49220

URL	Tags
https://git.kernel.org/stable/c/770d42fff12d8595adda9025a0b92091f543e775	Patch
https://git.kernel.org/stable/c/a7e8de822e0b1979f08767c751f6c8a9c1d4ad86	Patch
https://git.kernel.org/stable/c/b786abe7c67c6ef71410c8e23292b3091d616ad1	Patch
https://git.kernel.org/stable/c/e2951eaa9398415ac054b7bd80b8163b6838ead4	Patch
https://git.kernel.org/stable/c/ec376f5c11c88c0215d173599db8449cd4196759	Patch
https://git.kernel.org/stable/c/f2a1e0eb70c2d954176c07d75d28742bde30e9f3	Patch

URL

CVE-2022-49220 | dax: make sure inodes are flushed before destroy cache

Exploit prediction scoring system (EPSS) score for CVE-2022-49220

Common vulnerability scoring system (CVSS) metrics for CVE-2022-49220

Weakness enumeration for CVE-2022-49220

OS Trackers for CVE-2022-49220

Affected software / configurations for CVE-2022-49220

References for CVE-2022-49220