CVE-2021-47515
kernel: seg6: fix the iif in the IPv6 socket control block
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · May 24, 2024
Updated · August 5, 2026
Description
A vulnerability was found in the Linux kernel's seg6 implementation in the seg6_do_srh_encap() function, where the issue arises when an IPv4 packet is encapsulated within an IPv6 segment routing header, causing the receiving interface index to be cleared, leading to potential NULL pointer dereferences.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
CVSS / CWE
CVSS 3.1 · 5.3CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-476 · NULL Pointer Dereference