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NVD / CVE Program· CNA Linux

CVE-2026-64569: mpls: fix NULL deref in mpls_valid_fib_dump_req() on CONFIG_INET=n

Noroxi assessment

Priority: Monitor (action score 0/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.17% (FIRST EPSS).
  • Fixed version: Linux Linux 03b5a2c29afc8e634924c75d6ee94140e70de88d, 06db79411a280707c7e4bf4b221ff4e664b51502, 56d96fededd61192cd7cc8d2b0f36adfd59036c3; azl3 kernel 6.6.145.2-1 on Azure Linux 3.0 6.6.150.1-1.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 03b5a2c29afc8e634924c75d6ee94140e70de88d, 06db79411a280707c7e4bf4b221ff4e664b51502, 56d96fededd61192cd7cc8d2b0f36adfd59036c3; azl3 kernel 6.6.145.2-1 on Azure Linux 3.0 6.6.150.1-1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

—No exploit Fix available
Published
Aug 5, 2026
Updated
Aug 19, 2026
EPSS
0.1% · 6th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 4.20affected
    • 196cfebf897266c3450519e916bab9daff74e52c and later · before bfc1cb5d6a8308e493e307f1c823d2107abc0a47affected · git
    • 196cfebf897266c3450519e916bab9daff74e52c and later · before 03b5a2c29afc8e634924c75d6ee94140e70de88daffected · git
    • 196cfebf897266c3450519e916bab9daff74e52c and later · before e796ce9ef4356dc7cbbaa8373843f77852f2814daffected · git
    • 196cfebf897266c3450519e916bab9daff74e52c and later · before d6eee7cd078aaf9dd75efc801f6c9b608a37cd71affected · git
    • 196cfebf897266c3450519e916bab9daff74e52c and later · before ad6284ced6a15e4abd57ca4d0793b7bd15ca52ceaffected · git
    • 196cfebf897266c3450519e916bab9daff74e52c and later · before 5f6e7b32bd1fbde10fd31a4143260735ea535b8aaffected · git
    • 196cfebf897266c3450519e916bab9daff74e52c and later · before 06db79411a280707c7e4bf4b221ff4e664b51502affected · git
    • 196cfebf897266c3450519e916bab9daff74e52c and later · before 56d96fededd61192cd7cc8d2b0f36adfd59036c3affected · git
    • before 4.20not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.187-16.1.187-1
Debian:12linux-6.12before 6.12.101-1~deb12u16.12.101-1~deb12u1
Debian:13linuxbefore 6.12.101-16.12.101-1
Debian:14linuxbefore 7.1.6-17.1.6-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-64566Aug 5, 2026 · xfrm: iptfs: propagate SKBFL_SHARED_FRAG in iptfs_skb_add_frags()
    39Monitor
  • ← EarlierCVE-2026-64568Aug 5, 2026 · wifi: mac80211: fix unsol_bcast_probe_resp double free on alloc failure
    31Monitor
  • Later →CVE-2026-64571Aug 5, 2026 · wifi: p54: validate RX frame length in p54_rx_eeprom_readback()
    0Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux03b5a2c29afc8e634924c75d6ee94140e70de88dVendor (CNA)
Linux Linux06db79411a280707c7e4bf4b221ff4e664b51502Vendor (CNA)
Linux Linux56d96fededd61192cd7cc8d2b0f36adfd59036c3Vendor (CNA)
Linux Linux5f6e7b32bd1fbde10fd31a4143260735ea535b8aVendor (CNA)
Linux Linuxad6284ced6a15e4abd57ca4d0793b7bd15ca52ceVendor (CNA)
Linux Linuxbfc1cb5d6a8308e493e307f1c823d2107abc0a47Vendor (CNA)
Linux Linuxd6eee7cd078aaf9dd75efc801f6c9b608a37cd71Vendor (CNA)
Linux Linuxe796ce9ef4356dc7cbbaa8373843f77852f2814dVendor (CNA)
azl3 kernel 6.6.145.2-1 on Azure Linux 3.06.6.150.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
debian:linux6.1.187-1 · Debian:12Package registry (OSV)
debian:linux-6.126.12.101-1~deb12u1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Technical details

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

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References

Show all references (7 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

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