CVE-2022-49549

published 2025-02-26

CVE-2022-49549: In the Linux kernel, the following vulnerability has been resolved: x86/MCE/AMD: Fix memory leak when threshold_create_bank() fails In…

Priority P4 18 medium 5.5 CVSS 3.1

AV L AC L PR L UI N S U C N I N A H

In the Linux kernel, the following vulnerability has been resolved:

x86/MCE/AMD: Fix memory leak when threshold_create_bank() fails

In mce_threshold_create_device(), if threshold_create_bank() fails, the
previously allocated threshold banks array @bp will be leaked because
the call to mce_threshold_remove_device() will not free it.

This happens because mce_threshold_remove_device() fetches the pointer
through the threshold_banks per-CPU variable but bp is written there
only after the bank creation is successful, and not before, when
threshold_create_bank() fails.

Add a helper which unwinds all the bank creation work previously done
and pass into it the previously allocated threshold banks array for
freeing.

[ bp: Massage. ]

Affected

15 ranges

Vendor	Product	Version range	Fixed in
debian	linux	< linux 5.18.5-1 (bookworm)	linux 5.18.5-1 (bookworm)
linux	linux	—	—
linux	linux	>= 6458de97fc15530b54477c4e2b70af653e8ac3d9 < b4acb8e7f1594607bc9017ef0aacb40b24a003d6	b4acb8e7f1594607bc9017ef0aacb40b24a003d6
linux	linux	>= 6458de97fc15530b54477c4e2b70af653e8ac3d9 < cc0dd4456f9573bf8af9b4d8754433918e809e1e	cc0dd4456f9573bf8af9b4d8754433918e809e1e
linux	linux	>= 6458de97fc15530b54477c4e2b70af653e8ac3d9 < 9708f1956eeb70c86943e0bc62fa3b0101b59616	9708f1956eeb70c86943e0bc62fa3b0101b59616
linux	linux	>= 6458de97fc15530b54477c4e2b70af653e8ac3d9 < 396b8e7ab2a99ddac57d3522b3da5e58cb608d37	396b8e7ab2a99ddac57d3522b3da5e58cb608d37
linux	linux	>= 6458de97fc15530b54477c4e2b70af653e8ac3d9 < e5f28623ceb103e13fc3d7bd45edf9818b227fd0	e5f28623ceb103e13fc3d7bd45edf9818b227fd0
linux	linux_kernel	>= 0 < 5.10.127-1	5.10.127-1
linux	linux_kernel	>= 0 < 5.18.5-1	5.18.5-1
linux	linux_kernel	>= 0 < 5.18.5-1	5.18.5-1
linux	linux_kernel	>= 0 < 5.18.5-1	5.18.5-1
linux	linux_kernel	>= 5.11 < 5.15.46	5.15.46
linux	linux_kernel	>= 5.16 < 5.17.14	5.17.14
linux	linux_kernel	>= 5.18 < 5.18.3	5.18.3
linux	linux_kernel	>= 5.8 < 5.10.121	5.10.121

CVSS provenance

nvd v3.1 5.5 MEDIUM CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

osv 5.5 MEDIUM

vendor_debian 5.5 MEDIUM

vendor_redhat 5.5 MEDIUM

Stop checking back — get the weekly exploitation signal.

Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.

CWE-401