CVE WatchAug 4, 2026

CVE-2021-47291

In the Linux kernel, the following vulnerability has been resolved: ipv6: fix another slab-out-of-bounds in fib6_nh_flush_exceptions While

CVSS

7.8

High

EPSS

0.2%

p16

KEV

—

Exploit Today

0-100

Published: May 21, 2024 · Last modified: Aug 4, 2026 · CWE-125

EPSS · 30d

0.2%EPSS · 30 days0.2%

2026-07-312026-08-28

Technical description

In the Linux kernel, the following vulnerability has been resolved: ipv6: fix another slab-out-of-bounds in fib6_nh_flush_exceptions While running the self-tests on a KASAN enabled kernel, I observed a slab-out-of-bounds splat very similar to the one reported in commit 821bbf79fe46 ("ipv6: Fix KASAN: slab-out-of-bounds Read in fib6_nh_flush_exceptions"). We additionally need to take care of fib6_metrics initialization failure when the caller provides an nh. The fix is similar, explicitly free the route instead of calling fib6_info_release on a half-initialized object.

Official references

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