CVE-2022-49259

medium

Published 2022-11-15 · Modified 2022-11-08

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CVSS v3

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CVSS v4 NEW

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not yet in upstream

VIR risk

5.5

Description

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.

Predictions

Exploit likelihood

20%

Patch ETA

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Heuristic predictions, AS-IS, for prioritization only.

Mitigations

Mitigation details

Source: Red Hat Errata — Red Hat Inc. · View original ↗ · Open-Errata-API

Description kernel: block: don't delete queue kobject before its children CVSS v3: 2.3 (CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L) Errata / fixed releases ProductPackageAdvisoryReleased Red Hat Enterprise Linux 8kernel-0:4.18.0-425.3.1.el8RHSA-2022:76832022-11-08T00:00:00Z Red Hat Enterprise Linux 9kernel-0:5.14.0-162.6.1.el9_1RHSA-2022:82672022-11-15T00:00:00Z Red Hat Enterprise Linux…

Description

kernel: block: don't delete queue kobject before its children

CVSS v3: 2.3 (CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L)

Errata / fixed releases

Product	Package	Advisory	Released
Red Hat Enterprise Linux 8	`kernel-0:4.18.0-425.3.1.el8`	RHSA-2022:7683	2022-11-08T00:00:00Z
Red Hat Enterprise Linux 9	`kernel-0:5.14.0-162.6.1.el9_1`	RHSA-2022:8267	2022-11-15T00:00:00Z
Red Hat Enterprise Linux 9	`kernel-0:5.14.0-162.6.1.el9_1`	RHSA-2022:8267	2022-11-15T00:00:00Z

Package state

Product	Package	State
Red Hat Enterprise Linux 10	`kernel`	Not affected
Red Hat Enterprise Linux 6	`kernel`	Not affected
Red Hat Enterprise Linux 7	`kernel`	Out of support scope
Red Hat Enterprise Linux 7	`kernel-rt`	Out of support scope
Red Hat Enterprise Linux 8	`kernel-rt`	Affected
Red Hat Enterprise Linux 9	`kernel-rt`	Affected

Apply commands

bash fix

Apply RHSA-2022:7683 for Red Hat Enterprise Linux 8

yum update -y kernel
# or:
dnf upgrade -y kernel

Affected

Vendor	Product	Version
redhat	Red Hat Enterprise Linux 10	`Not affected`
redhat	Red Hat Enterprise Linux 6	`Not affected`
redhat	Red Hat Enterprise Linux 8	`Affected`
redhat	Red Hat Enterprise Linux 9	`Affected`

OS impact

SUSE Affected 1 release

Version	Status	Fixed in
—	Affected	—

Debian Fixed 5 releases

Version	Status	Fixed in
trixie	Fixed	`5.17.3-1`
sid	Fixed	`5.17.3-1`
forky	Fixed	`5.17.3-1`
bullseye	Fixed	`5.10.113-1`
bookworm	Fixed	`5.17.3-1`

Red Hat Fixed 2 releases

Version	Status	Fixed in
9	Fixed	—
8	Fixed	—

References

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.