CVE-2022-49259 [Medium] | Security Vulnerability in Linux Kernel

In the Linux kernel, the following vulnerability has been resolved: block: don't delete queue kobject before its children kobjects aren't supposed to be deleted before their child kobjects are deleted. Apparently this is usually benign; however, a WARN will be triggered if one of the child kobjects has a named attribute group: sysfs group 'modes' not found for kobject 'crypto' WARNING: CPU: 0 PID: 1 at fs/sysfs/group.c:278 sysfs_remove_group+0x72/0x80 ... Call Trace: sysfs_remove_groups+0x29/0x40 fs/sysfs/group.c:312 __kobject_del+0x20/0x80 lib/kobject.c:611 kobject_cleanup+0xa4/0x140 lib/kobject.c:696 kobject_release lib/kobject.c:736 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x53/0x70 lib/kobject.c:753 blk_crypto_sysfs_unregister+0x10/0x20 block/blk-crypto-sysfs.c:159 blk_unregister_queue+0xb0/0x110 block/blk-sysfs.c:962 del_gendisk+0x117/0x250 block/genhd.c:610 Fix this by moving the kobject_del() and the corresponding kobject_uevent() to the correct place.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-04-06	0.05%	0.01%	-0.04%
2	2025-12-23	0.04%	0.05%	+0.01%
3	2025-11-21	—	0.04%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-04-06

0.05%

0.01%

-0.04%

2025-12-23

0.04%

0.05%

+0.01%

2025-11-21

—

0.04%

—

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-2022-49259

vendor	priority	summary	link
`debian`	not yet assigned	CVE-2022-49259 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-2022-49259
`redhat`	low	—	https://access.redhat.com/security/cve/CVE-2022-49259
`suse`	medium	—	https://www.suse.com/security/cve/CVE-2022-49259/
`ubuntu`	medium	CVE-2022-49259 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 146, not-affected 131, released 129.	https://ubuntu.com/security/CVE-2022-49259

Affected software / configurations for CVE-2022-49259

Vendor	Product	Version	Raw CPE
linux	linux_kernel	>= 4.16, < 4.19.238	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 4.20, < 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-2022-49259

URL	Tags
https://git.kernel.org/stable/c/0b5924a14d64487ebd51127b0358d06066ef5384	Patch
https://git.kernel.org/stable/c/0f69288253e9fc7c495047720e523b9f1aba5712	Patch
https://git.kernel.org/stable/c/3d7e32c8da45957326f56937e0471c686d1a7711	Patch
https://git.kernel.org/stable/c/84fe3ca6e7910beb47ec13509d484f84fa2a41ad	Patch
https://git.kernel.org/stable/c/b2001eb10f59363da930cdd6e086a2861986fa18	Patch
https://git.kernel.org/stable/c/cf0cb8686e55d9c022944bc6ba9e19e832889e83	Patch
https://git.kernel.org/stable/c/efaa0e969261e97c1fdd8e0338e5dd3ba5b9219c	Patch

URL

CVE-2022-49259 | block: don't delete queue kobject before its children

Exploit prediction scoring system (EPSS) score for CVE-2022-49259

Common vulnerability scoring system (CVSS) metrics for CVE-2022-49259

Weakness enumeration for CVE-2022-49259

OS Trackers for CVE-2022-49259

Affected software / configurations for CVE-2022-49259

References for CVE-2022-49259