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Fencer Vulns
medium 5.5

CVE-2024-42283 json

net: nexthop: Initialize all fields in dumped nexthops

published 2024-08-17 2 y ago modified 2026-10-15 25 d ago also EUVD-2024-39506

cvss
5.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 15%
public exploits
0
none known

Summary

In the Linux kernel, the following vulnerability has been resolved:

net: nexthop: Initialize all fields in dumped nexthops

struct nexthop_grp contains two reserved fields that are not initialized by nla_put_nh_group(), and carry garbage. This can be observed e.g. with strace (edited for clarity):

# ip nexthop add id 1 dev lo # ip nexthop add id 101 group 1 # strace -e recvmsg ip nexthop get id 101 ... recvmsg(... [{nla_len=12, nla_type=NHA_GROUP}, [{id=1, weight=0, resvd1=0x69, resvd2=0x67}]] ...) = 52

The fields are reserved and therefore not currently used. But as they are, they leak kernel memory, and the fact they are not just zero complicates repurposing of the fields for new ends. Initialize the full structure.

Patch / fix

  • Linux Linux 5.4.282, 5.10.224, 5.15.165, 6.1.103, 6.6.44, 6.10.3, 6.11
  • Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem V1.1.1
  • linux Debian 12 6.1.106-1
  • linux Debian 14, Debian 13 6.10.3-1

debian advisories DEBIAN-CVE-2024-42283

  • linux Ubuntu 20.04 LTS 5.4.0-200.220
  • linux Ubuntu 22.04 LTS 5.15.0-125.135
  • linux Ubuntu 24.04 LTS 6.8.0-50.51
  • linux-aws Ubuntu 20.04 LTS 5.4.0-1135.145
  • linux-aws Ubuntu 22.04 LTS 5.15.0-1072.78
  • linux-aws Ubuntu 24.04 LTS 6.8.0-1020.22
  • linux-gcp Ubuntu 20.04 LTS 5.4.0-1139.148
  • linux-gcp Ubuntu 22.04 LTS 5.15.0-1071.79

ubuntu advisories UBUNTU-CVE-2024-42283

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • kernel RHEL 9 5.14.0-503.14.1.el9_5
  • rv RHEL 9 5.14.0-503.14.1.el9_5
  • perf RHEL 9 5.14.0-503.14.1.el9_5
  • rtla RHEL 9 5.14.0-503.14.1.el9_5
  • bpftool RHEL 9 7.4.0-503.14.1.el9_5
  • libperf RHEL 9 5.14.0-503.14.1.el9_5
  • kernel-rt RHEL 9 5.14.0-503.14.1.el9_5
  • kernel-64k RHEL 9 5.14.0-503.14.1.el9_5

red hat advisories RHSA-2024:9605

  • kernel-rt Linux Micro 6.0 6.4.0-10.1
  • kernel-source-rt Linux Micro 6.0 6.4.0-10.1
  • kernel-livepatch-MICRO-6-0-RT_Update_2 Linux Micro 6.0 1-1.1
  • kernel-source Linux Micro 6.0 6.4.0-19.1
  • kernel-default Linux Micro 6.0 6.4.0-19.1
  • kernel-kvmsmall Linux Micro 6.0 6.4.0-19.1
  • kernel-default-base Linux Micro 6.0 6.4.0-17.1.1.51
  • kernel-livepatch-MICRO-6-0_Update_2 Linux Micro 6.0 1-1.1

suse advisories SUSE-SU-2025:20047-1SUSE-SU-2025:20044-1SUSE-SU-2024:3483-1SUSE-SU-2024:3383-1SUSE-SU-2024:3209-1SUSE-SU-2024:3195-1

  • kernel AlmaLinux 9 5.14.0-503.14.1.el9_5
  • rv AlmaLinux 9 5.14.0-503.14.1.el9_5
  • perf AlmaLinux 9 5.14.0-503.14.1.el9_5
  • rtla AlmaLinux 9 5.14.0-503.14.1.el9_5
  • bpftool AlmaLinux 9 7.4.0-503.14.1.el9_5
  • libperf AlmaLinux 9 5.14.0-503.14.1.el9_5
  • kernel-rt AlmaLinux 9 5.14.0-503.14.1.el9_5
  • kernel-64k AlmaLinux 9 5.14.0-503.14.1.el9_5

almalinux advisories ALSA-2024:9605

  • kernel Azure Linux 3.0 6.6.47.1-1
  • kernel CBL-Mariner 2.0 5.15.167.1-1

azure linux advisories AZL-47799AZL-47838

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2024-42283 updated cvss 5.5

kernel: net: nexthop: Initialize all fields in dumped nexthops

  • Red Hat Enterprise Linux 9 kernel-rt, kernel-rt-kvm, kernel-rt-core, kernel-rt-modules, kernel-rt-debug-kvm, kernel-rt-debug-core, +12 more
    affected: no fix planned “Will not fix”
  • Red Hat CodeReady Linux Builder (v. 9) libperf 5.14.0-503.14.1.el9_5, kernel-debuginfo-common-s390x 5.14.0-503.14.1.el9_5, kernel-debuginfo-common-x86_64 5.14.0-503.14.1.el9_5, kernel-debuginfo-common-aarch64 5.14.0-503.14.1.el9_5, kernel-debuginfo-common-ppc64le 5.14.0-503.14.1.el9_5 Red Hat Enterprise Linux AppStream (v. 9) rv 5.14.0-503.14.1.el9_5, perf 5.14.0-503.14.1.el9_5, rtla 5.14.0-503.14.1.el9_5, kernel-devel-matched 5.14.0-503.14.1.el9_5, kernel-64k-devel-matched 5.14.0-503.14.1.el9_5, kernel-debug-devel-matched 5.14.0-503.14.1.el9_5, +6 more Red Hat Enterprise Linux BaseOS (v. 9) bpftool 7.4.0-503.14.1.el9_5, kernel 5.14.0-503.14.1.el9_5, kernel-64k 5.14.0-503.14.1.el9_5, kernel-core 5.14.0-503.14.1.el9_5, kernel-tools 5.14.0-503.14.1.el9_5, python3-perf 5.14.0-503.14.1.el9_5, +29 more Red Hat Enterprise Linux Real Time (v. 9) kernel-rt 5.14.0-503.14.1.el9_5, kernel-rt-core 5.14.0-503.14.1.el9_5, kernel-rt-modules 5.14.0-503.14.1.el9_5, kernel-rt-debug-core 5.14.0-503.14.1.el9_5, kernel-rt-modules-core 5.14.0-503.14.1.el9_5, kernel-rt-debug-modules 5.14.0-503.14.1.el9_5, +4 more Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt 5.14.0-503.14.1.el9_5, kernel-rt-kvm 5.14.0-503.14.1.el9_5, kernel-rt-core 5.14.0-503.14.1.el9_5, kernel-rt-modules 5.14.0-503.14.1.el9_5, kernel-rt-debug-kvm 5.14.0-503.14.1.el9_5, kernel-rt-debug-core 5.14.0-503.14.1.el9_5, +6 more
    fixed: vendor fix RHSA-2024:9605
  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-rt, kernel-core, kernel-tools, +29 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

cisa ICSA-24-102-01 updated cvss 5.5

Siemens SIMATIC S7-1500 TM MFP

  • Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
    affected: mitigation, no fix available

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.24% chance of exploitation in the next 30 days, higher than 15% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products

  • Linux Linux
  • Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem

Classification

Weakness
  • CWE-908 Use of Uninitialized Resource
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.