CVE-2021-47291: ipv6: fix another slab-out-of-bounds in fib6_nh_flush_exceptions
First published: Tue May 21 2024(Updated: )
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.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | >=5.3<5.4.136 | |
| Linux Linux kernel | >=5.5<5.10.54 | |
| Linux Linux kernel | >=5.11<5.13.6 | |
| Linux Linux kernel | =5.14-rc1 | |
| Linux Linux kernel | =5.14-rc2 |
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