CVE-2021-27365 Information

Description

An issue was discovered in the Linux kernel through 5.11.3. Certain iSCSI data structures do not have appropriate length constraints or checks and can exceed the PAGE_SIZE value. An unprivileged user can send a Netlink message that is associated with iSCSI and has a length up to the maximum length of a Netlink message.

CVSS Vector

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

Reference

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f9dbdf97a5bd92b1a49cee3d591b55b11fd7a6d5 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ec98ea7070e94cc25a422ec97d1421e28d97b7ee https://www.openwall.com/lists/oss-security/2021/03/06/1 https://bugzilla.suse.com/show_bug.cgi?id=1182715 https://lists.debian.org/debian-lts-announce/2021/03/msg00010.html https://blog.grimm-co.com/2021/03/new-old-bugs-in-linux-kernel.html https://lists.debian.org/debian-lts-announce/2021/03/msg00035.html http://packetstormsecurity.com/files/162117/Kernel-Live-Patch-Security-Notice-LSN-0075-1.html https://security.netapp.com/advisory/ntap-20210409-0001/ https://www.oracle.com/security-alerts/cpuoct2021.html

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

7.8