CVE-2023-52893

Summary

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

gsmi: fix null-deref in gsmi_get_variable

We can get EFI variables without fetching the attribute, so we must allow for that in gsmi.

commit 859748255b43 ("efi: pstore: Omit efivars caching EFI varstore access layer") added a new get_variable call with attr=NULL, which triggers panic in gsmi.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux74c5b31c6618f01079212332b2e5f6c42f2d6307 < ee5763ef829bd923033510de6d1df7c73f085e4baffected
LinuxLinux74c5b31c6618f01079212332b2e5f6c42f2d6307 < 32313c11bdc8a02c577abaf865be3664ab30410aaffected
LinuxLinux74c5b31c6618f01079212332b2e5f6c42f2d6307 < ffef77794fb5f1245c3249b86342bad2299accb5affected
LinuxLinux74c5b31c6618f01079212332b2e5f6c42f2d6307 < ae2a9dcc8caa60b1e14671294e5ec902ea5d1dfdaffected
LinuxLinux74c5b31c6618f01079212332b2e5f6c42f2d6307 < eb0421d90f916dffe96b4c049ddf01c0c50620d2affected
LinuxLinux74c5b31c6618f01079212332b2e5f6c42f2d6307 < 6646d769fdb0ce4318ef9afd127f8526d1ca8393affected
LinuxLinux74c5b31c6618f01079212332b2e5f6c42f2d6307 < a769b05eeed7accc4019a1ed9799dd72067f1ce8affected
LinuxLinux3.0affected
LinuxLinux0 < 3.0unaffected
LinuxLinux4.14.304 <= 4.14.*unaffected
LinuxLinux4.19.271 <= 4.19.*unaffected
LinuxLinux5.4.230 <= 5.4.*unaffected
LinuxLinux5.10.165 <= 5.10.*unaffected
LinuxLinux5.15.90 <= 5.15.*unaffected
LinuxLinux6.1.8 <= 6.1.*unaffected
LinuxLinux6.2 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

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

References