CVE-2021-46910

🗓️ 27 Feb 2024 06:53:50Reported by LinuxType

ARM: 9063/1: mm: reduce maximum number of CPUs if DEBUG_KMAP_LOCAL is enabled. The debugging code for kmap_local() doubles the number of per-CPU fixmap slots allocated for kmap_local(), causing fixmap region to grow downwards and collide with virtual DT mapping, leading to kernel paging request error

Reporter	Title	Published	Views	Family All 17
ATTACKERKB	CVE-2021-46910	27 Feb 202407:15	–	attackerkb
BDU FSTEC	The vulnerability of the kmap_local() function in the Linux operating system’s kernel allows a hacker to cause a service failure.	22 Apr 202400:00	–	bdu_fstec
Circl	CVE-2021-46910	27 Feb 202408:21	–	circl
CNNVD	Linux kernel security vulnerabilities	27 Feb 202400:00	–	cnnvd
Cvelist	CVE-2021-46910 ARM: 9063/1: mm: reduce maximum number of CPUs if DEBUG_KMAP_LOCAL is enabled	27 Feb 202406:53	–	cvelist
Debian CVE	CVE-2021-46910	27 Feb 202406:53	–	debiancve
NVD	CVE-2021-46910	27 Feb 202407:15	–	nvd
OSV	DEBIAN-CVE-2021-46910	27 Feb 202407:15	–	osv
OSV	UBUNTU-CVE-2021-46910	27 Feb 202407:15	–	osv
Prion	Spoofing	27 Feb 202407:15	–	prion

NVD

Vulners

CNA

Node

linux linux_kernelRange5.11.0–5.11.16

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "arch/arm/Kconfig",
      "arch/arm/mm/mmu.c"
    ],
    "versions": [
      {
        "version": "2a15ba82fa6ca3f35502b3060f22118a938d2889",
        "lessThan": "5965ac11b1d5fcb38464728931649cd9df79c7c9",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "2a15ba82fa6ca3f35502b3060f22118a938d2889",
        "lessThan": "d624833f5984d484c5e3196f34b926f9e71dafee",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "arch/arm/Kconfig",
      "arch/arm/mm/mmu.c"
    ],
    "versions": [
      {
        "version": "5.11",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "5.11",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.11.16",
        "lessThanOrEqual": "5.11.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.12",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

Source	Link
git	www.git.kernel.org/stable/c/d624833f5984d484c5e3196f34b926f9e71dafee
git	www.git.kernel.org/stable/c/5965ac11b1d5fcb38464728931649cd9df79c7c9

17 Jun 2026 04:15Current

5.2Medium risk

Vulners AI Score5.2

CVSS 3.15.5

EPSS0.00193

SSVC