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BDVDB
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Vulnerabilities

CVE-2021-21781 | BDVDB-2026-159098 Detail

Linux Kernel

Description#

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

Impact#

Per CVSS v3.0: confidentiality impact low, integrity impact none, availability impact none. Attack vector: local.

Weaknesses#

  • CWE-908 Use of Uninitialized Resource

References#

Exploit#

No public exploit known

History#

  1. Version 1Record published in the CVE List.
  2. Version 2Most recent update recorded in the CVE List.