Bug 2525456 (CVE-2026-80646)

Summary: CVE-2026-80646 kernel: ipv6: guard against possible NULL deref in __in6_dev_stats_get()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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Doc Text:
A flaw was found in the Linux kernel's IPv6 component. This vulnerability arises when the `dev_get_by_index_rcu()` function returns a null value if the original physical device is unregistered, leading to a NULL pointer dereference in `__in6_dev_stats_get()`. A local attacker could exploit this flaw to trigger a system crash, resulting in a Denial of Service (DoS).
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-08-28 07:45:55 UTC 
In the Linux kernel, the following vulnerability has been resolved:

ipv6: guard against possible NULL deref in __in6_dev_stats_get()

dev_get_by_index_rcu() could return NULL if the original physical
device is unregistered.

Found by Sashiko.
Comment 1 gkamathe 2026-09-01 11:54:32 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026082842-CVE-2026-80646-2d23@gregkh/T