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Rewterz Threat Advisory – CVE-2021-3715 – Linux Kernel Privilege Escalation

Severity

High

Analysis Summary

CVE-2021-3715

Linux Kernel could allow a local authenticated attacker to gain elevated privileges on the system, caused by a use-after-free in route4_change() in net/sched/cls_route.c. By sending a specially-crafted request, an attacker could exploit this vulnerability to escalate privileges.

Impact

  • Privilege Escalation

Affected Vendors

Linux

Affected Products

  • Linux Kernel 5.9

Remediation

Refer to Linux GIT Repository for the patch, upgrade, or suggested workaround information.

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ef299cc3fa1a9e1288665a9fdc8bff55629fd359