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[email protected]CVE-2021-21781

HistoryAug 18, 2021 - 3:15 p.m.

CVE-2021-21781

2021-08-1815:15:07

CWE-908

[email protected]

web.nvd.nist.gov

280

cve-2021-21781

information disclosure

arm sigpage

linux kernel

vulnerability

nvd

memory leak

2.1 Low

CVSS2

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

AV:L/AC:L/Au:N/C:P/I:N/A:N

3.3 Low

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

4.7 Medium

AI Score

Confidence

Low

0.0004 Low

EPSS

Percentile

15.9%

JSON

An information disclosure vulnerability exists in the ARM SIGPAGE functionality of Linux Kernel v5.4.66 and v5.4.54. The latest version (5.11-rc4) seems to still be vulnerable. A userland application can read the contents of the sigpage, which can leak kernel memory contents. An attacker can read a process’s memory at a specific offset to trigger this vulnerability. This was fixed in kernel releases: 4.14.222 4.19.177 5.4.99 5.10.17 5.11

Affected configurations

Vulners

NVD

Node

linuxlinux_kernelRange≤v5.4.54

linuxlinux_kernelRange≤Linux Kernel v5.4.66

VendorProductVersionCPE
linuxlinux_kernel*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linuxlinux_kernel*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
linux	linux_kernel	*	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	*	cpe:2.3:o:linux:linux_kernel::::::::

CNA Affected

[
  {
    "product": "Linux Kernel",
    "vendor": "n/a",
    "versions": [
      {
        "status": "affected",
        "version": "Linux Kernel v5.4.54, Linux Kernel v5.4.66"
      }
    ]
  }
]