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CVE-2026-98379

netfilter: ip6t_rpfilter: reject routes without inet6_dev

No known exploitation. EPSS puts it in the 5th percentile. Fixed versions are out.

CVSS —Not scoredEPSS percentile5th0.2% chance in 30 daysCISA KEVNot listedNo confirmed exploitation
No public exploit knownFix1 product4 fixed builds listed below

Published Updated Sources: CVE.org, NVD

NVD CVE.org

What to do

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  • LinuxAffected: ≥ e26f9a480fb6c1b614660e824d69a74e2ce990f3, < f4de78756b0fddbd125b2b1b77c74f2eccc8e977Upgrade to: f4de78756b0fddbd125b2b1b77c74f2eccc8e977Affected: ≥ e26f9a480fb6c1b614660e824d69a74e2ce990f3, < 1681ab6dd1271f2f36047490793b78b1848bbcc9Upgrade to: 1681ab6dd1271f2f36047490793b78b1848bbcc9Affected: ≥ e26f9a480fb6c1b614660e824d69a74e2ce990f3, < 65487e9e99431ffcf05024a817f51ee4e3bd9b47Upgrade to: 65487e9e99431ffcf05024a817f51ee4e3bd9b47Affected: ≥ e26f9a480fb6c1b614660e824d69a74e2ce990f3, < f49da48bd679cfee646d6a40dd02b1933de577d1Upgrade to: f49da48bd679cfee646d6a40dd02b1933de577d1 + 4 more branchesStated by: CVE record

Versions as the sources state them. Full version matrix after sign-in

What it is

From the CVE record

In the Linux kernel, the following vulnerability has been resolved: netfilter: ip6t_rpfilter: reject routes without inet6_dev ip6_route_lookup() can return an error-free route whose rt6i_idev is NULL. Lowering an external nexthop device's MTU below IPV6_MIN_MTU tears down its inet6_dev while fib6_ifdown() leaves routes using nexthop objects in the FIB. An unprivileged user can construct this state with rtnetlink in a private user and network namespace, then trigger a NULL dereference through an IPv6 rpfilter lookup: Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000 KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] RIP: rpfilter_mt (net/ipv6/netfilter/ip6t_rpfilter.c:75) Call Trace: ip6t_do_table (net/ipv6/netfilter/ip6_tables.c:316) nf_hook_slow (net/netfilter/core.c:619) ipv6_rcv (net/ipv6/ip6_input.c:351) __netif_receive_skb_one_core (net/core/dev.c:6216) process_backlog (net/core/dev.c:6680) __napi_poll (net/core/dev.c:7739) net_rx_action (net/core/dev.c:7959) handle_softirqs (kernel/softirq.c:622) do_softirq.part.0 (kernel/softirq.c:523) __local_bh_enable_ip (kernel/softirq.c:450) __dev_queue_xmit (net/core/dev.c:4913) packet_sendmsg (net/packet/af_packet.c:3139) __sys_sendto (net/socket.c:2252) __x64_sys_sendto (net/socket.c:2259) do_syscall_64 (arch/x86/entry/syscall_64.c:94) entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121) Kernel panic - not syncing: Fatal exception in interrupt Reject routes without an inet6_dev immediately after lookup. Such routes are not eligible for reverse-path filtering, and the check protects all later rt6i_idev dereferences.

In plain language

No plain-language summary for this CVE yet.

Exploitation

Where each signal puts this CVE on the scale from published to confirmed exploited.

EPSS5th
CISA KEV

Not in the catalog. CISA has not confirmed exploitation.

Public exploits

No public exploit or proof of concept found in the sources we track.

EPSS

0.2% chance of exploitation activity in the next 30 days, which ranks it in the 5th percentile of scored CVEs.

Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.

Lifecycle

2 events over 0 days, from the signal feeds we watch.

  1. Publishedrecord updated

Affected products

Sources

References in the record

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In the news

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