vulnerability
Ubuntu: (CVE-2021-21781): linux vulnerability
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 2 | (AV:L/AC:L/Au:N/C:P/I:N/A:N) | Aug 18, 2021 | Nov 19, 2024 | Mar 27, 2026 |
Severity
2
CVSS
(AV:L/AC:L/Au:N/C:P/I:N/A:N)
Published
Aug 18, 2021
Added
Nov 19, 2024
Modified
Mar 27, 2026
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
Solutions
ubuntu-upgrade-linuxubuntu-upgrade-linux-awsubuntu-upgrade-linux-aws-5-4ubuntu-upgrade-linux-aws-fipsubuntu-upgrade-linux-aws-hweubuntu-upgrade-linux-azureubuntu-upgrade-linux-azure-4-15ubuntu-upgrade-linux-azure-5-4ubuntu-upgrade-linux-azure-fdeubuntu-upgrade-linux-azure-fipsubuntu-upgrade-linux-dell300xubuntu-upgrade-linux-fipsubuntu-upgrade-linux-gcpubuntu-upgrade-linux-gcp-4-15ubuntu-upgrade-linux-gcp-5-4ubuntu-upgrade-linux-gcp-fipsubuntu-upgrade-linux-gkeubuntu-upgrade-linux-gke-5-4ubuntu-upgrade-linux-gkeopubuntu-upgrade-linux-gkeop-5-4ubuntu-upgrade-linux-hweubuntu-upgrade-linux-hwe-5-4ubuntu-upgrade-linux-hwe-5-8ubuntu-upgrade-linux-kvmubuntu-upgrade-linux-oem-5-10ubuntu-upgrade-linux-oracleubuntu-upgrade-linux-oracle-5-4ubuntu-upgrade-linux-raspiubuntu-upgrade-linux-raspi-5-4ubuntu-upgrade-linux-raspi2ubuntu-upgrade-linux-riscv-5-8ubuntu-upgrade-linux-snapdragon
References
- CVE-2021-21781
- https://attackerkb.com/topics/CVE-2021-21781
- CWE-908
- EUVD-EUVD-2021-8953
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2021-8953
- https://git.kernel.org/linus/9c698bff66ab4914bb3d71da7dc6112519bde23e
- https://talosintelligence.com/vulnerability_reports/TALOS-2021-1243
- https://www.cve.org/CVERecord?id=CVE-2021-21781
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