| Summary: |
VUL-0: CVE-2021-47291: kernel: ipv6: fix another slab-out-of-bounds in fib6_nh_flush_exceptions |
| Product: |
[Novell Products] SUSE Security Incidents
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Reporter: |
SMASH SMASH <smash_bz> |
| Component: |
Incidents | Assignee: |
Michal Kubeček <mkubecek> |
| Status: |
IN_PROGRESS
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QA Contact: |
Security Team bot <security-team> |
| Severity: |
Major
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| Priority: |
P2 - High
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CC: |
camila.matos, carlos.lopez, dsterba, meissner, mhocko, mkubecek
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| Version: |
unspecified | |
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| Target Milestone: |
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| Hardware: |
Other | |
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| OS: |
Other | |
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| URL: |
https://smash.suse.de/issue/406924/
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| Whiteboard: |
CVSSv3.1:SUSE:CVE-2021-47291:7.8:(AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) |
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Found By:
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Security Response Team
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Services Priority:
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Business Priority:
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Blocker:
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Marketing QA Status:
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IT Deployment:
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| Bug Depends on: |
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| Bug Blocks: |
1227651
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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. References: http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-47291 https://www.cve.org/CVERecord?id=CVE-2021-47291 https://git.kernel.org/stable/c/115784bcccf135c3a3548098153413d76f16aae0 https://git.kernel.org/stable/c/830251361425c5be044db4d826aaf304ea3d14c6 https://git.kernel.org/stable/c/8fb4792f091e608a0a1d353dfdf07ef55a719db5 https://git.kernel.org/stable/c/ce8fafb68051fba52546f8bbe8621f7641683680 https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2021/CVE-2021-47291.mbox