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 running the self-tests on a KASAN enabled kernel, I observed a slab-out-of-bounds splat very similar to the one…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.25%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.1 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
- EPSS
- 0.25% probability · 16th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-125
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/115784bcccf135c3a3548098153413d76f16aae0Patch
- https://git.kernel.org/stable/c/830251361425c5be044db4d826aaf304ea3d14c6Patch
- https://git.kernel.org/stable/c/8fb4792f091e608a0a1d353dfdf07ef55a719db5Patch
- https://git.kernel.org/stable/c/ce8fafb68051fba52546f8bbe8621f7641683680Patch
- https://git.kernel.org/stable/c/115784bcccf135c3a3548098153413d76f16aae0Patch
- https://git.kernel.org/stable/c/830251361425c5be044db4d826aaf304ea3d14c6Patch
- https://git.kernel.org/stable/c/8fb4792f091e608a0a1d353dfdf07ef55a719db5Patch
- https://git.kernel.org/stable/c/ce8fafb68051fba52546f8bbe8621f7641683680Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.