Bug 2516921 (CVE-2026-74288) - CVE-2026-74288 kernel: net: fib_rules: Don't dump dying fib_rule in fib_rules_dump()
Summary: CVE-2026-74288 kernel: net: fib_rules: Don't dump dying fib_rule in fib_rules...
Keywords:
Status: NEW
Alias: CVE-2026-74288
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-08-15 06:40 UTC by OSIDB Bzimport
Modified: 2026-08-20 14:44 UTC (History)
2 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-08-15 06:40:29 UTC 
In the Linux kernel, the following vulnerability has been resolved:

net: fib_rules: Don't dump dying fib_rule in fib_rules_dump().

rocker_router_fib_event() calls fib_rule_get() during RCU dump.

If the fib_rule is dying, refcount_inc() will complain about it.

Let's call refcount_inc_not_zero() in fib_rules_dump().
Comment 1 Keith Grant 2026-08-20 14:40:07 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026081547-CVE-2026-74288-d92e@gregkh/T
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