CVE-2023-52893 gsmi: fix null-deref in gsmi_get_variable

2024-08-2106:10:33

Linux

www.cve.org

linux kernel

vulnerability

resolved

efi variables

gsmi

panic

EPSS

Percentile

5.1%

JSON

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.

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/firmware/google/gsmi.c"
    ],
    "versions": [
      {
        "version": "74c5b31c6618",
        "lessThan": "ee5763ef829b",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "74c5b31c6618",
        "lessThan": "32313c11bdc8",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "74c5b31c6618",
        "lessThan": "ffef77794fb5",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "74c5b31c6618",
        "lessThan": "ae2a9dcc8caa",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "74c5b31c6618",
        "lessThan": "eb0421d90f91",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "74c5b31c6618",
        "lessThan": "6646d769fdb0",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "74c5b31c6618",
        "lessThan": "a769b05eeed7",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/firmware/google/gsmi.c"
    ],
    "versions": [
      {
        "version": "3.0",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "3.0",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "4.14.304",
        "lessThanOrEqual": "4.14.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "4.19.271",
        "lessThanOrEqual": "4.19.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.4.230",
        "lessThanOrEqual": "5.4.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.10.165",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.15.90",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.1.8",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.2",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]