CVE-2022-49549 (GCVE-0-2022-49549)

Vulnerability from cvelistv5 – Published: 2025-02-26 02:14 – Updated: 2025-10-01 19:46
VLAI?
Title
x86/MCE/AMD: Fix memory leak when threshold_create_bank() fails
Summary
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. ]
Severity ?
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE
  • CWE-401 - Missing Release of Memory after Effective Lifetime
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 6458de97fc15530b54477c4e2b70af653e8ac3d9 , < b4acb8e7f1594607bc9017ef0aacb40b24a003d6 (git)
Affected: 6458de97fc15530b54477c4e2b70af653e8ac3d9 , < cc0dd4456f9573bf8af9b4d8754433918e809e1e (git)
Affected: 6458de97fc15530b54477c4e2b70af653e8ac3d9 , < 9708f1956eeb70c86943e0bc62fa3b0101b59616 (git)
Affected: 6458de97fc15530b54477c4e2b70af653e8ac3d9 , < 396b8e7ab2a99ddac57d3522b3da5e58cb608d37 (git)
Affected: 6458de97fc15530b54477c4e2b70af653e8ac3d9 , < e5f28623ceb103e13fc3d7bd45edf9818b227fd0 (git)
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    Linux Linux Affected: 5.8
Unaffected: 0 , < 5.8 (semver)
Unaffected: 5.10.121 , ≤ 5.10.* (semver)
Unaffected: 5.15.46 , ≤ 5.15.* (semver)
Unaffected: 5.17.14 , ≤ 5.17.* (semver)
Unaffected: 5.18.3 , ≤ 5.18.* (semver)
Unaffected: 5.19 , ≤ * (original_commit_for_fix)
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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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