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Fencer Vulns
high 7.8

CVE-2024-56603 json

net: af_can: do not leave a dangling sk pointer in can_create()

published 2024-12-27 22 mo ago modified 2026-08-05 3 mo ago also EUVD-2024-53251

cvss
7.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 14%
public exploits
0
none known

Summary

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

net: af_can: do not leave a dangling sk pointer in can_create()

On error can_create() frees the allocated sk object, but sock_init_data() has already attached it to the provided sock object. This will leave a dangling sk pointer in the sock object and may cause use-after-free later.

Patch / fix

  • Linux Linux 5.4.287, 5.10.231, 5.15.174, 6.1.120, 6.6.66, 6.12.5, 6.13
  • linux Debian 12 6.1.123-1
  • linux Debian 14, Debian 13 6.12.5-1

debian advisories DEBIAN-CVE-2024-56603

  • linux Ubuntu 20.04 LTS 5.4.0-211.231
  • linux Ubuntu 22.04 LTS 5.15.0-135.146
  • linux Ubuntu 24.04 LTS 6.8.0-58.60
  • linux-aws Ubuntu 20.04 LTS 5.4.0-1142.152
  • linux-aws Ubuntu 22.04 LTS 5.15.0-1080.87
  • linux-aws Ubuntu 24.04 LTS 6.8.0-1027.29
  • linux-gcp Ubuntu 20.04 LTS 5.4.0-1145.154
  • linux-gcp Ubuntu 22.04 LTS 5.15.0-1079.88

ubuntu advisories UBUNTU-CVE-2024-56603

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 10.2 6.12.0-211.16.1.el10_2
  • rv RHEL 10.2 6.12.0-211.16.1.el10_2
  • perf RHEL 10.2 6.12.0-211.16.1.el10_2
  • rtla RHEL 10.2 6.12.0-211.16.1.el10_2
  • libperf RHEL 10.2 6.12.0-211.16.1.el10_2
  • kernel-rt RHEL 10.2 6.12.0-211.16.1.el10_2
  • kernel-64k RHEL 10.2 6.12.0-211.16.1.el10_2
  • kernel-core RHEL 10.2 6.12.0-211.16.1.el10_2

red hat advisories RHSA-2026:25908RHSA-2026:19569RHSA-2026:4011RHSA-2025:20518

  • kernel-rt Linux Micro 6.1, Linux Micro 6.0 6.4.0-25.1
  • kernel-source-rt Linux Micro 6.1, Linux Micro 6.0 6.4.0-25.1
  • kernel-livepatch-MICRO-6-0-RT_Update_5 Linux Micro 6.1, Linux Micro 6.0 1-1.1
  • kernel-source Linux Micro 6.1, Linux Micro 6.0 6.4.0-25.1
  • kernel-default Linux Micro 6.1, Linux Micro 6.0 6.4.0-25.1
  • kernel-kvmsmall Linux Micro 6.1, Linux Micro 6.0 6.4.0-25.1
  • kernel-default-base Linux Micro 6.1, Linux Micro 6.0 6.4.0-24.1.21.4
  • kernel-livepatch-MICRO-6-0_Update_5 Linux Micro 6.1, Linux Micro 6.0 1-1.2

suse advisories SUSE-SU-2025:20166-1SUSE-SU-2025:20249-1SUSE-SU-2025:20165-1SUSE-SU-2025:20248-1SUSE-SU-2025:0557-1SUSE-SU-2025:0499-1

  • kernel AlmaLinux 10 6.12.0-211.16.1.el10_2
  • rv AlmaLinux 10 6.12.0-211.16.1.el10_2
  • perf AlmaLinux 10 6.12.0-211.16.1.el10_2
  • rtla AlmaLinux 10 6.12.0-211.16.1.el10_2
  • libperf AlmaLinux 10 6.12.0-211.16.1.el10_2
  • kernel-rt AlmaLinux 10 6.12.0-211.16.1.el10_2
  • kernel-64k AlmaLinux 10 6.12.0-211.16.1.el10_2
  • kernel-core AlmaLinux 10 6.12.0-211.16.1.el10_2

almalinux advisories ALSA-2026:19569ALSA-2025:20518

  • kernel Rocky Linux 10 6.12.0-211.16.1.el10_2.0.1
  • kernel Rocky Linux 9 5.14.0-611.5.1.el9_7

rocky linux advisories RLSA-2026:19569RLSA-2025:20518

  • kernel Azure Linux 3.0 6.6.76.1-1
  • kernel CBL-Mariner 2.0 5.15.176.3-1

azure linux advisories AZL-55488AZL-55588

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-2024-56603 updated cvss 7.3

kernel: net: af_can: do not leave a dangling sk pointer in can_create()

  • 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
    affected: no fix planned “Out of support scope”
  • 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 available
  • Red Hat CodeReady Linux Builder EUS (v.9.6) libperf 5.14.0-570.96.1.el9_6, kernel-debuginfo-common-s390x 5.14.0-570.96.1.el9_6, kernel-debuginfo-common-x86_64 5.14.0-570.96.1.el9_6, kernel-debuginfo-common-aarch64 5.14.0-570.96.1.el9_6, kernel-debuginfo-common-ppc64le 5.14.0-570.96.1.el9_6
    fixed: vendor fix RHSA-2026:4011
  • Red Hat Enterprise Linux AppStream (v. 9) rv 5.14.0-611.5.1.el9_7, perf 5.14.0-611.5.1.el9_7, rtla 5.14.0-611.5.1.el9_7, python3-perf 5.14.0-611.5.1.el9_7, kernel-devel-matched 5.14.0-611.5.1.el9_7, kernel-64k-devel-matched 5.14.0-611.5.1.el9_7, +7 more
    fixed: vendor fix RHSA-2025:20518
  • Red Hat Enterprise Linux AppStream (v. 10) rv 6.12.0-211.16.1.el10_2, perf 6.12.0-211.16.1.el10_2, rtla 6.12.0-211.16.1.el10_2, python3-perf 6.12.0-211.16.1.el10_2, kernel-devel-matched 6.12.0-211.16.1.el10_2, kernel-64k-devel-matched 6.12.0-211.16.1.el10_2, +7 more
    fixed: vendor fix RHSA-2026:19569
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) rv 6.12.0-55.79.1.el10_0, perf 6.12.0-55.79.1.el10_0, rtla 6.12.0-55.79.1.el10_0, python3-perf 6.12.0-55.79.1.el10_0, kernel-devel-matched 6.12.0-55.79.1.el10_0, kernel-64k-devel-matched 6.12.0-55.79.1.el10_0, +7 more
    fixed: vendor fix RHSA-2026:25908
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) rv 5.14.0-570.96.1.el9_6, perf 5.14.0-570.96.1.el9_6, rtla 5.14.0-570.96.1.el9_6, python3-perf 5.14.0-570.96.1.el9_6, kernel-devel-matched 5.14.0-570.96.1.el9_6, kernel-64k-devel-matched 5.14.0-570.96.1.el9_6, +7 more
    fixed: vendor fix RHSA-2026:4011
  • Red Hat Enterprise Linux BaseOS (v. 9) kernel 5.14.0-611.5.1.el9_7, kernel-64k 5.14.0-611.5.1.el9_7, kernel-core 5.14.0-611.5.1.el9_7, kernel-tools 5.14.0-611.5.1.el9_7, kernel-modules 5.14.0-611.5.1.el9_7, kernel-64k-core 5.14.0-611.5.1.el9_7, +27 more
    fixed: vendor fix RHSA-2025:20518
show 14 more
  • Red Hat Enterprise Linux BaseOS (v. 10) kernel 6.12.0-211.16.1.el10_2, kernel-64k 6.12.0-211.16.1.el10_2, kernel-core 6.12.0-211.16.1.el10_2, kernel-tools 6.12.0-211.16.1.el10_2, kernel-modules 6.12.0-211.16.1.el10_2, kernel-64k-core 6.12.0-211.16.1.el10_2, +28 more
    fixed: vendor fix RHSA-2026:19569
  • Red Hat Enterprise Linux BaseOS EUS (v. 10.0) kernel 6.12.0-55.79.1.el10_0, kernel-64k 6.12.0-55.79.1.el10_0, kernel-core 6.12.0-55.79.1.el10_0, kernel-tools 6.12.0-55.79.1.el10_0, kernel-modules 6.12.0-55.79.1.el10_0, kernel-64k-core 6.12.0-55.79.1.el10_0, +27 more
    fixed: vendor fix RHSA-2026:25908
  • Red Hat Enterprise Linux BaseOS EUS (v.9.6) kernel 5.14.0-570.96.1.el9_6, kernel-64k 5.14.0-570.96.1.el9_6, kernel-core 5.14.0-570.96.1.el9_6, kernel-tools 5.14.0-570.96.1.el9_6, kernel-modules 5.14.0-570.96.1.el9_6, kernel-64k-core 5.14.0-570.96.1.el9_6, +27 more
    fixed: vendor fix RHSA-2026:4011
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) libperf 5.14.0-611.5.1.el9_7, kernel-debuginfo-common-s390x 5.14.0-611.5.1.el9_7, kernel-debuginfo-common-x86_64 5.14.0-611.5.1.el9_7, kernel-debuginfo-common-aarch64 5.14.0-611.5.1.el9_7, kernel-debuginfo-common-ppc64le 5.14.0-611.5.1.el9_7
    fixed: vendor fix RHSA-2025:20518
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) libperf 6.12.0-211.16.1.el10_2, kernel-debuginfo-common-s390x 6.12.0-211.16.1.el10_2, kernel-debuginfo-common-x86_64 6.12.0-211.16.1.el10_2, kernel-debuginfo-common-aarch64 6.12.0-211.16.1.el10_2, kernel-debuginfo-common-ppc64le 6.12.0-211.16.1.el10_2
    fixed: vendor fix RHSA-2026:19569
  • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) libperf 6.12.0-55.79.1.el10_0, kernel-debuginfo-common-s390x 6.12.0-55.79.1.el10_0, kernel-debuginfo-common-x86_64 6.12.0-55.79.1.el10_0, kernel-debuginfo-common-aarch64 6.12.0-55.79.1.el10_0, kernel-debuginfo-common-ppc64le 6.12.0-55.79.1.el10_0
    fixed: vendor fix RHSA-2026:25908
  • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt 5.14.0-611.5.1.el9_7, kernel-rt-64k 5.14.0-611.5.1.el9_7, kernel-rt-core 5.14.0-611.5.1.el9_7, kernel-rt-modules 5.14.0-611.5.1.el9_7, kernel-rt-64k-core 5.14.0-611.5.1.el9_7, kernel-rt-debug-core 5.14.0-611.5.1.el9_7, +14 more
    fixed: vendor fix RHSA-2025:20518
  • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt 6.12.0-211.16.1.el10_2, kernel-rt-64k 6.12.0-211.16.1.el10_2, kernel-rt-core 6.12.0-211.16.1.el10_2, kernel-rt-modules 6.12.0-211.16.1.el10_2, kernel-rt-64k-core 6.12.0-211.16.1.el10_2, kernel-rt-debug-core 6.12.0-211.16.1.el10_2, +14 more
    fixed: vendor fix RHSA-2026:19569
  • Red Hat Enterprise Linux Real Time EUS (v. 10.0) kernel-rt 6.12.0-55.79.1.el10_0, kernel-rt-64k 6.12.0-55.79.1.el10_0, kernel-rt-core 6.12.0-55.79.1.el10_0, kernel-rt-modules 6.12.0-55.79.1.el10_0, kernel-rt-64k-core 6.12.0-55.79.1.el10_0, kernel-rt-debug-core 6.12.0-55.79.1.el10_0, +14 more
    fixed: vendor fix RHSA-2026:25908
  • Red Hat Enterprise Linux Real Time EUS (v.9.6) kernel-rt 5.14.0-570.96.1.el9_6, kernel-rt-64k 5.14.0-570.96.1.el9_6, kernel-rt-core 5.14.0-570.96.1.el9_6, kernel-rt-modules 5.14.0-570.96.1.el9_6, kernel-rt-64k-core 5.14.0-570.96.1.el9_6, kernel-rt-debug-core 5.14.0-570.96.1.el9_6, +14 more
    fixed: vendor fix RHSA-2026:4011
  • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt 5.14.0-611.5.1.el9_7, kernel-rt-core 5.14.0-611.5.1.el9_7, kernel-rt-modules 5.14.0-611.5.1.el9_7, kernel-rt-debug-core 5.14.0-611.5.1.el9_7, kernel-rt-modules-core 5.14.0-611.5.1.el9_7, kernel-rt-debug-modules 5.14.0-611.5.1.el9_7, +4 more
    fixed: vendor fix RHSA-2025:20518
  • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt 6.12.0-211.16.1.el10_2, kernel-rt-core 6.12.0-211.16.1.el10_2, kernel-rt-modules 6.12.0-211.16.1.el10_2, kernel-rt-debug-core 6.12.0-211.16.1.el10_2, kernel-rt-modules-core 6.12.0-211.16.1.el10_2, kernel-rt-debug-modules 6.12.0-211.16.1.el10_2, +4 more
    fixed: vendor fix RHSA-2026:19569
  • Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0) kernel-rt 6.12.0-55.79.1.el10_0, kernel-rt-kvm 6.12.0-55.79.1.el10_0, kernel-rt-core 6.12.0-55.79.1.el10_0, kernel-rt-modules 6.12.0-55.79.1.el10_0, kernel-rt-debug-kvm 6.12.0-55.79.1.el10_0, kernel-rt-debug-core 6.12.0-55.79.1.el10_0, +6 more
    fixed: vendor fix RHSA-2026:25908
  • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6) kernel-rt 5.14.0-570.96.1.el9_6, kernel-rt-kvm 5.14.0-570.96.1.el9_6, kernel-rt-core 5.14.0-570.96.1.el9_6, kernel-rt-modules 5.14.0-570.96.1.el9_6, kernel-rt-debug-kvm 5.14.0-570.96.1.el9_6, kernel-rt-debug-core 5.14.0-570.96.1.el9_6, +6 more
    fixed: vendor fix RHSA-2026:4011

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-25-226-07 updated cvss 5.5

Siemens Third-Party Components in SINEC OS

  • Siemens RUGGEDCOM RST2428P (6GK6242-6PA00) < 3.2
    affected: fixed in V3.2 support.industry.siemens.com
  • Siemens SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family < 3.2
    affected: fixed in V3.2
  • Siemens SCALANCE XCM-/XRM-/XCH-/XRH-300 family < 3.2
    affected: fixed in V3.2 support.industry.siemens.com

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
total
Assessed
20 mo ago

Exploit prediction

0.24% chance of exploitation in the next 30 days, higher than 14% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CISA ADP 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Linux Linux

Classification

Weakness
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.