CVE-2026-64569 (GCVE-0-2026-64569)
Vulnerability from cvelistv5
Published
2026-08-05 08:08
Modified
2026-08-19 16:28
Severity ?
VLAI Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
mpls: fix NULL deref in mpls_valid_fib_dump_req() on CONFIG_INET=n
On CONFIG_INET=n builds, mpls_valid_fib_dump_req() walks the parsed
attribute table itself instead of calling ip_valid_fib_dump_req(). The
RTA_OIF arm passes tb[RTA_OIF] to nla_get_u32() without checking it is
present, so an RTM_GETROUTE dump for AF_MPLS with strict checking and no
RTA_OIF hits a NULL dereference.
RTM_GETROUTE is RTNL_KIND_GET, which rtnetlink_rcv_msg() permits without
CAP_NET_ADMIN, so an unprivileged user can trigger it.
Oops: general protection fault, probably for non-canonical address
0xdffffc0000000000: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
RIP: 0010:mpls_valid_fib_dump_req (net/mpls/af_mpls.c:2189)
Call Trace:
mpls_dump_routes (net/mpls/af_mpls.c:2236)
netlink_dump (net/netlink/af_netlink.c:2331)
__netlink_dump_start (net/netlink/af_netlink.c:2446)
rtnetlink_rcv_msg (net/core/rtnetlink.c:7033)
netlink_rcv_skb (net/netlink/af_netlink.c:2556)
netlink_unicast (net/netlink/af_netlink.c:1345)
netlink_sendmsg (net/netlink/af_netlink.c:1900)
__sock_sendmsg (net/socket.c:790)
____sys_sendmsg (net/socket.c:2684)
___sys_sendmsg (net/socket.c:2738)
__sys_sendmsg (net/socket.c:2770)
do_syscall_64 (arch/x86/entry/syscall_64.c:94)
entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
Skip unset attributes, as ip_valid_fib_dump_req() does.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Version: 196cfebf897266c3450519e916bab9daff74e52c Version: 196cfebf897266c3450519e916bab9daff74e52c Version: 196cfebf897266c3450519e916bab9daff74e52c Version: 196cfebf897266c3450519e916bab9daff74e52c Version: 196cfebf897266c3450519e916bab9daff74e52c Version: 196cfebf897266c3450519e916bab9daff74e52c Version: 196cfebf897266c3450519e916bab9daff74e52c Version: 196cfebf897266c3450519e916bab9daff74e52c |
||
{
"containers": {
"cna": {
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{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"net/mpls/af_mpls.c"
],
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],
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"vendor": "Linux",
"versions": [
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"version": "4.20"
},
{
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"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.265",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.216",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.183",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.148",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.101",
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},
{
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"status": "unaffected",
"version": "6.18.42",
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},
{
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"status": "unaffected",
"version": "7.1.6",
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},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
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{
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{
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}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmpls: fix NULL deref in mpls_valid_fib_dump_req() on CONFIG_INET=n\n\nOn CONFIG_INET=n builds, mpls_valid_fib_dump_req() walks the parsed\nattribute table itself instead of calling ip_valid_fib_dump_req(). The\nRTA_OIF arm passes tb[RTA_OIF] to nla_get_u32() without checking it is\npresent, so an RTM_GETROUTE dump for AF_MPLS with strict checking and no\nRTA_OIF hits a NULL dereference.\n\nRTM_GETROUTE is RTNL_KIND_GET, which rtnetlink_rcv_msg() permits without\nCAP_NET_ADMIN, so an unprivileged user can trigger it.\n\n Oops: general protection fault, probably for non-canonical address\n 0xdffffc0000000000: 0000 [#1] SMP KASAN NOPTI\n KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]\n RIP: 0010:mpls_valid_fib_dump_req (net/mpls/af_mpls.c:2189)\n Call Trace:\n mpls_dump_routes (net/mpls/af_mpls.c:2236)\n netlink_dump (net/netlink/af_netlink.c:2331)\n __netlink_dump_start (net/netlink/af_netlink.c:2446)\n rtnetlink_rcv_msg (net/core/rtnetlink.c:7033)\n netlink_rcv_skb (net/netlink/af_netlink.c:2556)\n netlink_unicast (net/netlink/af_netlink.c:1345)\n netlink_sendmsg (net/netlink/af_netlink.c:1900)\n __sock_sendmsg (net/socket.c:790)\n ____sys_sendmsg (net/socket.c:2684)\n ___sys_sendmsg (net/socket.c:2738)\n __sys_sendmsg (net/socket.c:2770)\n do_syscall_64 (arch/x86/entry/syscall_64.c:94)\n entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)\n\nSkip unset attributes, as ip_valid_fib_dump_req() does."
}
],
"providerMetadata": {
"dateUpdated": "2026-08-19T16:28:44.216Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/bfc1cb5d6a8308e493e307f1c823d2107abc0a47"
},
{
"url": "https://git.kernel.org/stable/c/03b5a2c29afc8e634924c75d6ee94140e70de88d"
},
{
"url": "https://git.kernel.org/stable/c/e796ce9ef4356dc7cbbaa8373843f77852f2814d"
},
{
"url": "https://git.kernel.org/stable/c/d6eee7cd078aaf9dd75efc801f6c9b608a37cd71"
},
{
"url": "https://git.kernel.org/stable/c/ad6284ced6a15e4abd57ca4d0793b7bd15ca52ce"
},
{
"url": "https://git.kernel.org/stable/c/5f6e7b32bd1fbde10fd31a4143260735ea535b8a"
},
{
"url": "https://git.kernel.org/stable/c/06db79411a280707c7e4bf4b221ff4e664b51502"
},
{
"url": "https://git.kernel.org/stable/c/56d96fededd61192cd7cc8d2b0f36adfd59036c3"
}
],
"title": "mpls: fix NULL deref in mpls_valid_fib_dump_req() on CONFIG_INET=n",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-64569",
"datePublished": "2026-08-05T08:08:07.233Z",
"dateReserved": "2026-07-19T15:36:31.797Z",
"dateUpdated": "2026-08-19T16:28:44.216Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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