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Vulnerabilities CVE-2021-47291

CVE-2021-47291

High
Open
TLP:CLEAR

ipv6: fix another slab-out-of-bounds in fib6_nh_flush_exceptions

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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.

Details

CVSS Score
7.8
EPSS Score
0.25%

16.2th percentile

CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Confidence
90%
Published
May 21, 2024
Last Modified
Aug 5, 2026
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