CVE-2021-47466

high

Published 2024-09-24 · Modified 2024-09-24

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CVSS v3

—

CVSS v4 NEW

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not yet in upstream

VIR risk

8.0

Description

In the Linux kernel, the following vulnerability has been resolved: mm, slub: fix potential memoryleak in kmem_cache_open() In error path, the random_seq of slub cache might be leaked. Fix this by using __kmem_cache_release() to release all the relevant resources.

Predictions

Exploit likelihood

20%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

Mitigation details

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

Description kernel: mm, slub: fix potential memoryleak in kmem_cache_open() CVSS v3: 5.5 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H) Errata / fixed releases ProductPackageAdvisoryReleased Red Hat Enterprise Linux 8kernel-rt-0:4.18.0-553.22.1.rt7.363.el8_10RHSA-2024:70012024-09-24T00:00:00Z Red Hat Enterprise Linux 8kernel-0:4.18.0-553.22.1.el8_10RHSA-2024:70002024-09-24T00:00:00Z Package state…

Description

kernel: mm, slub: fix potential memoryleak in kmem_cache_open()

CVSS v3: 5.5 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)

Errata / fixed releases

Product	Package	Advisory	Released
Red Hat Enterprise Linux 8	`kernel-rt-0:4.18.0-553.22.1.rt7.363.el8_10`	RHSA-2024:7001	2024-09-24T00:00:00Z
Red Hat Enterprise Linux 8	`kernel-0:4.18.0-553.22.1.el8_10`	RHSA-2024:7000	2024-09-24T00:00:00Z

Package state

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

Apply commands

bash fix

Apply RHSA-2024:7001 for Red Hat Enterprise Linux 8

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

Affected

Vendor	Product	Version
redhat	Red Hat Enterprise Linux 9	`Not affected`
redhat	Red Hat Enterprise Linux 9	`Not affected`

OS impact

SUSE Affected 1 release

Version	Status	Fixed in
—	Affected	—

Debian Fixed 5 releases

Version	Status	Fixed in
trixie	Fixed	`5.14.16-1`
sid	Fixed	`5.14.16-1`
forky	Fixed	`5.14.16-1`
bullseye	Fixed	`5.10.84-1`
bookworm	Fixed	`5.14.16-1`

Red Hat Fixed 1 release

Version	Status	Fixed in
8	Fixed	—

Rocky Linux Fixed 1 release

Version	Status	Fixed in
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.