netfilter: ip6t_rpfilter: reject routes without inet6_dev
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 withou
CVE-2026-98379
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-98379
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "e26f9a480fb6c1b614660e824d69a74e2ce990f3",
"lessThan": "f4de78756b0fddbd125b2b1b77c74f2eccc8e977",
"versionType": "git"
},
{
"status": "affected",
"version": "e26f9a480fb6c1b614660e824d69a74e2ce990f3",
"lessThan": "1681ab6dd1271f2f36047490793b78b1848bbcc9",
"versionType": "git"
},
{
"status": "affected",
"version": "e26f9a480fb6c1b614660e824d69a74e2ce990f3",
"lessThan": "65487e9e99431ffcf05024a817f51ee4e3bd9b47",
"versionType": "git"
},
{
"status": "affected",
"version": "e26f9a480fb6c1b614660e824d69a74e2ce990f3",
"lessThan": "f49da48bd679cfee646d6a40dd02b1933de577d1",
"versionType": "git"
},
{
"status": "affected",
"version": "e26f9a480fb6c1b614660e824d69a74e2ce990f3",
"lessThan": "290c96e5d9471d1ded9ab1e8ffbb04f6ee7b0f40",
"versionType": "git"
},
{
"status": "affected",
"version": "e26f9a480fb6c1b614660e824d69a74e2ce990f3",
"lessThan": "eafe081ea77d25b5c8e601680671b4ecb4520e7d",
"versionType": "git"
},
{
"status": "affected",
"version": "e26f9a480fb6c1b614660e824d69a74e2ce990f3",
"lessThan": "3a7384bc2e66217c9a01a392281334f4423740a0",
"versionType": "git"
},
{
"status": "affected",
"version": "e26f9a480fb6c1b614660e824d69a74e2ce990f3",
"lessThan": "1b9b5323725e458906c7620a3bc10398b51ad954",
"versionType": "git"
}
],
"programFiles": [
"net/ipv6/netfilter/ip6t_rpfilter.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3.3"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "3.3",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.271",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.222",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.189",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.158",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.112",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.55",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.9",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/ipv6/netfilter/ip6t_rpfilter.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98379
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #38450 · Revision 1
- Added to Heist Feed
- Publisher date