CVE-2023-52976 (GCVE-0-2023-52976)

Vulnerability from cvelistv5 – Published: 2025-03-27 16:43 – Updated: 2025-10-01 17:22
VLAI?
Title
efi: fix potential NULL deref in efi_mem_reserve_persistent
Summary
In the Linux kernel, the following vulnerability has been resolved: efi: fix potential NULL deref in efi_mem_reserve_persistent When iterating on a linked list, a result of memremap is dereferenced without checking it for NULL. This patch adds a check that falls back on allocating a new page in case memremap doesn't succeed. Found by Linux Verification Center (linuxtesting.org) with SVACE. [ardb: return -ENOMEM instead of breaking out of the loop]
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-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 18df7577adae6c6c778bf774b3aebcacbc1fb439 , < d92a25627bcdf264183670da73c9a60c0bac327e (git)
Affected: 18df7577adae6c6c778bf774b3aebcacbc1fb439 , < 87d4ff18738fd71e7e3c10827c80257da6283697 (git)
Affected: 18df7577adae6c6c778bf774b3aebcacbc1fb439 , < d8fc0b5fb3e816a4a8684bcd3ed02cbef0fce23c (git)
Affected: 18df7577adae6c6c778bf774b3aebcacbc1fb439 , < a2e6a9ff89f13666a1c3ff7195612ab949ea9afc (git)
Affected: 18df7577adae6c6c778bf774b3aebcacbc1fb439 , < 966d47e1f27c45507c5df82b2a2157e5a4fd3909 (git)
Affected: b5961ecad7121fec138ebee7d9eba4863f9dc6e7 (git)
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    Linux Linux Affected: 5.2
Unaffected: 0 , < 5.2 (semver)
Unaffected: 5.4.232 , ≤ 5.4.* (semver)
Unaffected: 5.10.168 , ≤ 5.10.* (semver)
Unaffected: 5.15.93 , ≤ 5.15.* (semver)
Unaffected: 6.1.11 , ≤ 6.1.* (semver)
Unaffected: 6.2 , ≤ * (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.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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