CVE-2024-26621 mm: huge_memory: don't force huge page alignment on 32 bit

2024-03-0221:31:49

Linux

www.cve.org

linux kernel

huge_memory

vulnerability

7.8 High

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

15.7%

JSON

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

mm: huge_memory: don’t force huge page alignment on 32 bit

commit efa7df3e3bb5 (“mm: align larger anonymous mappings on THP
boundaries”) caused two issues [1] [2] reported on 32 bit system or compat
userspace.

It doesn’t make too much sense to force huge page alignment on 32 bit
system due to the constrained virtual address space.

[1] https://lore.kernel.org/linux-mm/[email protected]/
[2] https://lore.kernel.org/linux-mm/CAJuCfpHXLdQy1a2B6xN2d7quTYwg2OoZseYPZTRpU0eHHKD-sQ@mail.gmail.com/

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "mm/huge_memory.c"
    ],
    "versions": [
      {
        "version": "1854bc6e2420",
        "lessThan": "87632bc9ecff",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1854bc6e2420",
        "lessThan": "7432376c9133",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1854bc6e2420",
        "lessThan": "4ef9ad19e176",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "mm/huge_memory.c"
    ],
    "versions": [
      {
        "version": "5.18",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "5.18",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.1.81",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.7.6",
        "lessThanOrEqual": "6.7.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.8",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]