CVE-2021-26708 — Improper Locking in Kernel

CWE-667 — Improper LockingCWE-269 — Improper Privilege ManagementCWE-362 — Race Condition11 documents10 sources
Severity
7.0HIGHNVD
EPSS
0.9%
top 23.81%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
21
Linux KernelNetapp Baseboard Management Controller 500f FirmwareNetapp Baseboard Management Controller A250 Firmware+18 more
Timeline
PublishedFeb 5
Latest updateSep 7

Description

A local privilege escalation was discovered in the Linux kernel before 5.10.13. Multiple race conditions in the AF_VSOCK implementation are caused by wrong locking in net/vmw_vsock/af_vsock.c. The race conditions were implicitly introduced in the commits that added VSOCK multi-transport support.

CVSS vector

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:HExploitability: 1.0 | Impact: 5.9

Affected Packages22 packages

▶NVDlinux/linux_kernel5.5 — 5.10.13
▶Debianlinux/linux_kernel< 5.10.13-1+3
▶debiandebian/linux< linux 5.10.13-1 (bookworm)

Patches

Patch: www.openwall.com ↗Patch: git.kernel.org ↗Patch: security.netapp.com ↗

🔴Vulnerability Details

3
Kernel
ipc, msg: Use dedicated slab buckets for alloc_msg()↗2024-07-01
▶
GHSA
GHSA-hhxw-8c9w-q5q9: A local privilege escalation was discovered in the Linux kernel before 5↗2022-05-24
▶
OSV
CVE-2021-26708: A local privilege escalation was discovered in the Linux kernel before 5↗2021-02-05
▶

📋Vendor Advisories

5
Palo Alto
PAN-SA-2024-0001 Informational Bulletin: Impact of OSS CVEs in PAN-OS↗2024-02-14
▶
Ubuntu
Linux kernel vulnerability↗2021-02-10
▶
Microsoft
A local privilege escalation was discovered in the Linux kernel before 5.10.13. Multiple race conditions in the AF_VSOCK implementation are caused by wrong locking in net/vmw_vsock/af_vsock.c. The rac↗2021-02-09
▶
Red Hat
kernel: race conditions caused by wrong locking in net/vmw_vsock/af_vsock.c↗2021-02-05
▶
Debian
CVE-2021-26708: linux - A local privilege escalation was discovered in the Linux kernel before 5.10.13. ...↗2021
▶

📄Research Papers

2
arXiv
Beyond Control: Exploring Novel File System Objects for Data-Only Attacks on Linux Systems↗2024-09-07
▶
arXiv
Timeloops: Automatic System Call Policy Learning for Containerized Microservices↗2022-09-26
▶