CVE-2023-52976

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]

Affected Software

VendorProductVersion RangeStatus
LinuxLinux18df7577adae6c6c778bf774b3aebcacbc1fb439 < d92a25627bcdf264183670da73c9a60c0bac327eaffected
LinuxLinux18df7577adae6c6c778bf774b3aebcacbc1fb439 < 87d4ff18738fd71e7e3c10827c80257da6283697affected
LinuxLinux18df7577adae6c6c778bf774b3aebcacbc1fb439 < d8fc0b5fb3e816a4a8684bcd3ed02cbef0fce23caffected
LinuxLinux18df7577adae6c6c778bf774b3aebcacbc1fb439 < a2e6a9ff89f13666a1c3ff7195612ab949ea9afcaffected
LinuxLinux18df7577adae6c6c778bf774b3aebcacbc1fb439 < 966d47e1f27c45507c5df82b2a2157e5a4fd3909affected
LinuxLinuxb5961ecad7121fec138ebee7d9eba4863f9dc6e7affected
LinuxLinux5.1.16 < 5.2affected
LinuxLinux5.2affected
LinuxLinux0 < 5.2unaffected
LinuxLinux5.4.232 <= 5.4.*unaffected
LinuxLinux5.10.168 <= 5.10.*unaffected
LinuxLinux5.15.93 <= 5.15.*unaffected
LinuxLinux6.1.11 <= 6.1.*unaffected
LinuxLinux6.2 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References