CVE Database›Document archive›CVE-2021-47126

CVE-2021-47126

kernel: ipv6: Fix KASAN: slab-out-of-bounds Read in fib6_nh_flush_exceptions

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Severity

Moderate

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · March 15, 2024

Updated · August 5, 2026

Description

A vulnerability was found in the Linux kernel, where an IPv6 implementation allowed a slab-out-of-bounds read in the fib6_nh_flush_exceptions function. This issue occurred when trying to free a non-allocated fib6_nh pointer, potentially leading to memory issues.

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

Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.

CVSS / CWE

CVSS 3.1 · 5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE-125 · Out-of-bounds Read