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NVD / CVE Program· CNA Linux

CVE-2024-26663: tipc: Check the bearer type before calling tipc_udp_nl_bearer_add()

Noroxi assessment

Priority: Monitor (action score 22/100)

  • 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: 0.25% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 0cd331dfd6023640c9669d0592bc0fd491205f87, 19d7314f2fb9515bdaac9829d4d8eb34edd1fe95, 24ec8f0da93b8a9fba11600be8a90f0d73fb46f1.
  • Severity is disputed: the assigning authority (CNA) scores it 7.8, NVD 5.5.
  • Mentioned 2 times in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 0cd331dfd6023640c9669d0592bc0fd491205f87, 19d7314f2fb9515bdaac9829d4d8eb34edd1fe95, 24ec8f0da93b8a9fba11600be8a90f0d73fb46f1 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: tipc: Check the bearer type before calling tipc_udp_nl_bearer_add() syzbot reported the following general protection fault [1]: general protection fault, probably for non-canonical address 0xdffffc0000000010: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000080-0x0000000000000087] ... RIP: 0010:tipc_udp_is_known_peer+0x9c/0x250 net/tipc/udp_media.c:291 ... Call Trace: <TASK> tipc_udp_nl_bearer_add+0x212/0x2f0 net/tipc/udp_media.c:646 tipc_nl_bearer_add+0x21e/0x360 net/tipc/bearer.c:1089 genl_family_rcv_msg_doit+0x1fc/0x2e0 net/netlink/genetlink.c:972 genl_family_rcv_msg net/netlink/genetlink.c:1052 [inline] genl_rcv_msg+0x561/0x800 net/netlink/genetlink.c:1067 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2544 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1076 netlink_unicast_kernel net/netlink/af_netlink.c:1341 [inline] netlink_unicast+0x53b/0x810 net/netlink/af_netlink.c:1367 netlink_sendmsg+0x8b7/0xd70 net/netlink/af_netlink.c:1909 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0xd5/0x180 net/socket.c:745 ____sys_sendmsg+0x6ac/0x940 net/socket.c:2584 ___sys_sendmsg+0x135/0x1d0 net/socket.c:2638 __sys_sendmsg+0x117/0x1e0 net/socket.c:2667 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b The cause of this issue is that when tipc_nl_bearer_add() is called with the TIPC_NLA_BEARER_UDP_OPTS attribute, tipc_udp_nl_bearer_add() is called even if the bearer is not UDP. tipc_udp_is_known_peer() called by tipc_udp_nl_bearer_add() assumes that the media_ptr field of the tipc_bearer has an udp_bearer type object, so the function goes crazy for non-UDP bearers. This patch fixes the issue by checking the bearer type before calling tipc_udp_nl_bearer_add() in tipc_nl_bearer_add().

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Apr 2, 2024
Updated
Aug 5, 2026
EPSS
0.2% · 16th percentile

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
5.5
CNA · Linux
7.8
2.3 point gap

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

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  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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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.

VendorProduct
linuxlinux kernel
debiandebian linux

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • debian debian linux10.0
  • linux linux kernel4.20 and later · before 5.4.269
  • linux linux kernel5.5 and later · before 5.10.210
  • linux linux kernel5.11 and later · before 5.15.149
  • linux linux kernel4.9 and later · before 4.19.307
  • linux linux kernel6.2 and later · before 6.6.17
  • linux linux kernel6.7 and later · before 6.7.5
  • linux linux kernel5.16 and later · before 6.1.78
  • linux linux kernel6.8

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

    • 4.9affected
    • ef20cd4dd1633987bcf46ac34ace2c8af212361f and later · before 24ec8f0da93b8a9fba11600be8a90f0d73fb46f1affected · git
    • ef20cd4dd1633987bcf46ac34ace2c8af212361f and later · before 6f70f0b412458c622a12d4292782c8e92e210c2faffected · git
    • ef20cd4dd1633987bcf46ac34ace2c8af212361f and later · before 19d7314f2fb9515bdaac9829d4d8eb34edd1fe95affected · git
    • ef20cd4dd1633987bcf46ac34ace2c8af212361f and later · before c1701ea85ef0ec7be6a1b36c7da69f572ed2fd12affected · git
    • ef20cd4dd1633987bcf46ac34ace2c8af212361f and later · before 3d3a5b31b43515b5752ff282702ca546ec3e48b6affected · git
    • ef20cd4dd1633987bcf46ac34ace2c8af212361f and later · before 888e3524be87f3df9fa3c083484e4b62b3e3bb59affected · git
    • ef20cd4dd1633987bcf46ac34ace2c8af212361f and later · before 0cd331dfd6023640c9669d0592bc0fd491205f87affected · git
    • ef20cd4dd1633987bcf46ac34ace2c8af212361f and later · before 3871aa01e1a779d866fa9dfdd5a836f342f4eb87affected · git
    • before 4.9not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.82-16.1.82-1
Debian:13linuxbefore 6.7.7-16.7.7-1
openSUSE:Leap 15.6dtb-aarch64before 6.4.0-150600.23.17.16.4.0-150600.23.17.1
openSUSE:Leap 15.6kernel-64kbbefore 6.4.0-150600.23.17.16.4.0-150600.23.17.1
openSUSE:Leap 15.6kernel-debugbefore 6.4.0-150600.23.17.16.4.0-150600.23.17.1
openSUSE:Leap 15.6kernel-defaultbefore 6.4.0-150600.23.17.16.4.0-150600.23.17.1
openSUSE:Leap 15.6kernel-default-basebefore 6.4.0-150600.23.17.1.150600.12.6.26.4.0-150600.23.17.1.150600.12.6.2
openSUSE:Leap 15.6kernel-docsbefore 6.4.0-150600.23.17.36.4.0-150600.23.17.3
openSUSE:Leap 15.6kernel-kvmsmallbefore 6.4.0-150600.23.17.16.4.0-150600.23.17.1
openSUSE:Leap 15.6kernel-obs-buildbefore 6.4.0-150600.23.17.16.4.0-150600.23.17.1
openSUSE:Leap 15.6kernel-obs-qabefore 6.4.0-150600.23.17.16.4.0-150600.23.17.1
openSUSE:Leap 15.6kernel-sourcebefore 6.4.0-150600.23.17.16.4.0-150600.23.17.1
openSUSE:Leap 15.6kernel-symsbefore 6.4.0-150600.23.17.16.4.0-150600.23.17.1
openSUSE:Leap 15.6kernel-zfcpdumpbefore 6.4.0-150600.23.17.16.4.0-150600.23.17.1
SUSE:Linux Enterprise Live Patching 15 SP6kernel-livepatch-SLE15-SP6_Update_3before 1-150600.13.3.11-150600.13.3.1
SUSE:Linux Enterprise Module for Basesystem 15 SP6kernel-64kbbefore 6.4.0-150600.23.17.16.4.0-150600.23.17.1
SUSE:Linux Enterprise Module for Basesystem 15 SP6kernel-defaultbefore 6.4.0-150600.23.17.16.4.0-150600.23.17.1
SUSE:Linux Enterprise Module for Basesystem 15 SP6kernel-default-basebefore 6.4.0-150600.23.17.1.150600.12.6.26.4.0-150600.23.17.1.150600.12.6.2
SUSE:Linux Enterprise Module for Basesystem 15 SP6kernel-sourcebefore 6.4.0-150600.23.17.16.4.0-150600.23.17.1
SUSE:Linux Enterprise Module for Basesystem 15 SP6kernel-zfcpdumpbefore 6.4.0-150600.23.17.16.4.0-150600.23.17.1
SUSE:Linux Enterprise Module for Development Tools 15 SP6kernel-docsbefore 6.4.0-150600.23.17.36.4.0-150600.23.17.3
SUSE:Linux Enterprise Module for Development Tools 15 SP6kernel-obs-buildbefore 6.4.0-150600.23.17.16.4.0-150600.23.17.1
SUSE:Linux Enterprise Module for Development Tools 15 SP6kernel-symsbefore 6.4.0-150600.23.17.16.4.0-150600.23.17.1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now

Published before and after this one in the same product

  • ← EarlierCVE-2024-26658Apr 2, 2024 · bcachefs: grab s_umount only if snapshotting
    22Monitor
  • ← EarlierCVE-2024-26660Apr 2, 2024 · drm/amd/display: Implement bounds check for stream encoder creation in DCN301
    22Monitor
  • Later →CVE-2024-26664Apr 2, 2024 · hwmon: (coretemp) Fix out-of-bounds memory access
    28Monitor

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 Linux0cd331dfd6023640c9669d0592bc0fd491205f87Vendor (CNA)
Linux Linux19d7314f2fb9515bdaac9829d4d8eb34edd1fe95Vendor (CNA)
Linux Linux24ec8f0da93b8a9fba11600be8a90f0d73fb46f1Vendor (CNA)
Linux Linux3871aa01e1a779d866fa9dfdd5a836f342f4eb87Vendor (CNA)
Linux Linux3d3a5b31b43515b5752ff282702ca546ec3e48b6Vendor (CNA)
Linux Linux6f70f0b412458c622a12d4292782c8e92e210c2fVendor (CNA)
Linux Linux888e3524be87f3df9fa3c083484e4b62b3e3bb59Vendor (CNA)
Linux Linuxc1701ea85ef0ec7be6a1b36c7da69f572ed2fd12Vendor (CNA)
debian:linux6.1.82-1 · Debian:12Package registry (OSV)
opensuse:dtb-aarch646.4.0-150600.23.17.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-64kb6.4.0-150600.23.17.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-debug6.4.0-150600.23.17.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-default6.4.0-150600.23.17.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-default-base6.4.0-150600.23.17.1.150600.12.6.2 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-docs6.4.0-150600.23.17.3 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-kvmsmall6.4.0-150600.23.17.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-obs-build6.4.0-150600.23.17.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-obs-qa6.4.0-150600.23.17.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-source6.4.0-150600.23.17.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-syms6.4.0-150600.23.17.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-zfcpdump6.4.0-150600.23.17.1 · openSUSE:Leap 15.6Package registry (OSV)
suse:kernel-64kb6.4.0-150600.23.17.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP6Package registry (OSV)
suse:kernel-default6.4.0-150600.23.17.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP6Package registry (OSV)
suse:kernel-default-base6.4.0-150600.23.17.1.150600.12.6.2 · SUSE:Linux Enterprise Module for Basesystem 15 SP6Package registry (OSV)
suse:kernel-docs6.4.0-150600.23.17.3 · SUSE:Linux Enterprise Module for Development Tools 15 SP6Package registry (OSV)
suse:kernel-livepatch-SLE15-SP6_Update_31-150600.13.3.1 · SUSE:Linux Enterprise Live Patching 15 SP6Package registry (OSV)
suse:kernel-obs-build6.4.0-150600.23.17.1 · SUSE:Linux Enterprise Module for Development Tools 15 SP6Package registry (OSV)
suse:kernel-source6.4.0-150600.23.17.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP6Package registry (OSV)
suse:kernel-syms6.4.0-150600.23.17.1 · SUSE:Linux Enterprise Module for Development Tools 15 SP6Package registry (OSV)
suse:kernel-zfcpdump6.4.0-150600.23.17.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP6Package 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.

No history yet (it accumulates with the daily EPSS job).

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

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-476 · NULL Pointer Dereference

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

nvd-primary

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✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (9 more)

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

All records