Vulnerability · Published Dec 27, 2024 · Assigned by Linux

CVE-2024-56645can: j1939: j1939_session_new(): fix skb reference counting

Critical 9.8

In plain English

A critical-severity security flaw in Linux from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 53% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)0.7%top 47.4% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

In the Linux kernel, the following vulnerability has been resolved: can: j1939: j1939_session_new(): fix skb reference counting Since j1939_session_skb_queue() does an extra skb_get() for each new skb, do the same for the initial one in j1939_session_new() to avoid refcount underflow. [mkl: clean up commit message]

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:10kernel6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-64k6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-64k5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-64k-core6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-64k-core5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-64k-debug6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-64k-debug5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-64k-debug-core6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-64k-debug-core5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-64k-debug-devel6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-64k-debug-devel5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-64k-debug-devel-matched6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-64k-debug-devel-matched5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-64k-debug-modules6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-64k-debug-modules5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-64k-debug-modules-core6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-64k-debug-modules-core5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-64k-debug-modules-extra6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-64k-debug-modules-extra5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-64k-devel6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-64k-devel5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-64k-devel-matched6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-64k-devel-matched5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-64k-modules6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-64k-modules5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-64k-modules-core6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-64k-modules-core5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-64k-modules-extra6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-64k-modules-extra5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-abi-stablelists6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-abi-stablelists5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-core6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-core5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-cross-headers6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-cross-headers5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-debug6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-debug5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-debug-core6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-debug-core5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-debug-devel6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-debug-devel5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-debug-devel-matched6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-debug-devel-matched5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-debug-modules6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-debug-modules5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-debug-modules-core6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-debug-modules-core5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-debug-modules-extra6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-debug-modules-extra5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-debug-uki-virt6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-debug-uki-virt5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-devel6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-devel5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-devel-matched6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-devel-matched5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-doc6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-doc5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-headers6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-headers5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-modules6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-modules5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-modules-core6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-modules-core5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-modules-extra6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-modules-extra5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-modules-extra-matched6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:10kernel-rt6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-rt5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-rt-64k6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-rt-64k5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-rt-64k-core6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-rt-64k-core5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-rt-64k-debug6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-rt-64k-debug5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-rt-64k-debug-core6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-rt-64k-debug-core5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-rt-64k-debug-devel6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-rt-64k-debug-devel5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-rt-64k-debug-modules6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-rt-64k-debug-modules5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-rt-64k-debug-modules-core6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-rt-64k-debug-modules-core5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-rt-64k-debug-modules-extra6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-rt-64k-debug-modules-extra5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-rt-64k-devel6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-rt-64k-devel5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-rt-64k-modules6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-rt-64k-modules5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-rt-64k-modules-core6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-rt-64k-modules-core5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-rt-64k-modules-extra6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-rt-64k-modules-extra5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-rt-core6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-rt-core5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-rt-debug6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-rt-debug5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-rt-debug-core6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-rt-debug-core5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-rt-debug-devel6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-rt-debug-devel5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-rt-debug-modules6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-rt-debug-modules5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-rt-debug-modules-core6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-rt-debug-modules-core5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-rt-debug-modules-extra6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-rt-debug-modules-extra5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-rt-devel6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-rt-devel5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-rt-modules6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-rt-modules5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-rt-modules-core6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-rt-modules-core5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-rt-modules-extra6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-rt-modules-extra5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-tools6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-tools5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-tools-libs6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-tools-libs5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-tools-libs-devel6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-tools-libs-devel5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-uki-virt6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-uki-virt5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-uki-virt-addons6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-uki-virt-addons5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-zfcpdump6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-zfcpdump5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-zfcpdump-core6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-zfcpdump-core5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-zfcpdump-devel6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-zfcpdump-devel5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-zfcpdump-devel-matched6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-zfcpdump-devel-matched5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-zfcpdump-modules6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-zfcpdump-modules5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-zfcpdump-modules-core6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-zfcpdump-modules-core5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10kernel-zfcpdump-modules-extra6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-zfcpdump-modules-extra5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10libperf6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9libperf5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10perf6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9perf5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10python3-perf6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9python3-perf5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10rtla6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9rtla5.14.0-611.5.1.el9_7ALSA-2025:20518
AlmaLinux:10rv6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9rv5.14.0-611.5.1.el9_7ALSA-2025:20518
Debian:12linux6.1.123-1DEBIAN-CVE-2024-56645
Debian:13linux6.12.5-1DEBIAN-CVE-2024-56645
Debian:14linux6.12.5-1DEBIAN-CVE-2024-56645
Rocky Linux:10kernel0:6.12.0-211.18.1.el10_2RLSA-2026:21557
Rocky Linux:9kernel0:5.14.0-611.5.1.el9_7RLSA-2025:20518
Ubuntu:22.04:LTSlinux5.15.0-135.146UBUNTU-CVE-2024-56645
Ubuntu:24.04:LTSlinux6.8.0-58.60UBUNTU-CVE-2024-56645
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2024-56645
Ubuntu:22.04:LTSlinux-aws5.15.0-1080.87UBUNTU-CVE-2024-56645
Ubuntu:24.04:LTSlinux-aws6.8.0-1027.29UBUNTU-CVE-2024-56645
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2024-56645
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2024-56645
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2024-56645
Ubuntu:22.04:LTSlinux-aws-6.86.8.0-1027.29~22.04.1UBUNTU-CVE-2024-56645
Ubuntu:22.04:LTSlinux-azure5.15.0-1084.93UBUNTU-CVE-2024-56645
Ubuntu:24.04:LTSlinux-azure6.8.0-1027.32UBUNTU-CVE-2024-56645
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2024-56645
Ubuntu:24.04:LTSlinux-azure-6.116.11.0-1012.12~24.04.1UBUNTU-CVE-2024-56645
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2024-56645
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2024-56645
Ubuntu:22.04:LTSlinux-azure-6.86.8.0-1027.32~22.04.1UBUNTU-CVE-2024-56645
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1084.93.1UBUNTU-CVE-2024-56645
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2024-56645
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2024-56645
Ubuntu:24.04:LTSlinux-azure-nvidia6.8.0-1014.15UBUNTU-CVE-2024-56645
Ubuntu:22.04:LTSlinux-gcp5.15.0-1079.88UBUNTU-CVE-2024-56645
Ubuntu:24.04:LTSlinux-gcp6.8.0-1028.30UBUNTU-CVE-2024-56645
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2024-56645
Ubuntu:24.04:LTSlinux-gcp-6.116.11.0-1011.11~24.04.1UBUNTU-CVE-2024-56645
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2024-56645
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2024-56645
Ubuntu:22.04:LTSlinux-gcp-6.86.8.0-1028.30~22.04.1UBUNTU-CVE-2024-56645
Ubuntu:22.04:LTSlinux-gke5.15.0-1077.83UBUNTU-CVE-2024-56645
Ubuntu:24.04:LTSlinux-gke6.8.0-1023.27UBUNTU-CVE-2024-56645
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1062.70UBUNTU-CVE-2024-56645
Ubuntu:24.04:LTSlinux-gkeop6.8.0-1010.12UBUNTU-CVE-2024-56645
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2024-56645
Ubuntu:24.04:LTSlinux-hwe-6.116.11.0-21.21~24.04.1UBUNTU-CVE-2024-56645
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2024-56645
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2024-56645
Ubuntu:22.04:LTSlinux-hwe-6.86.8.0-58.60~22.04.1UBUNTU-CVE-2024-56645
Ubuntu:22.04:LTSlinux-ibm5.15.0-1072.75UBUNTU-CVE-2024-56645
Ubuntu:24.04:LTSlinux-ibm6.8.0-1024.24UBUNTU-CVE-2024-56645
Ubuntu:22.04:LTSlinux-ibm-6.86.8.0-1024.24~22.04.1UBUNTU-CVE-2024-56645
Ubuntu:22.04:LTSlinux-intel-iot-realtime5.15.0-1073.75UBUNTU-CVE-2024-56645
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1075.81UBUNTU-CVE-2024-56645
Ubuntu:22.04:LTSlinux-kvm5.15.0-1076.81UBUNTU-CVE-2024-56645
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-135.146UBUNTU-CVE-2024-56645
Ubuntu:24.04:LTSlinux-lowlatency6.8.0-58.60.1UBUNTU-CVE-2024-56645
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2024-56645
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2024-56645

Affected products (as reported)

VendorProductVersions
Linux Linux 9d71dd0c70099914fcd063135da3c580865e924c – before 224e606a8d8e8c7db94036272c47a374556673139d71dd0c70099914fcd063135da3c580865e924c – before b3282c2bebeeb82ceec492ee4972f51ee7a4a1329d71dd0c70099914fcd063135da3c580865e924c – before 4199dd78a59896e091d3a7a05a77451aa7fd724d9d71dd0c70099914fcd063135da3c580865e924c – before f117cba69cbbd496babb3defcdf440df4fd6fe149d71dd0c70099914fcd063135da3c580865e924c – before 426d94815e12b6bdb9a75af294fbbafb9301601d9d71dd0c70099914fcd063135da3c580865e924c – before 68fceb143b635cdc59fed3896d5910aff38f345e9d71dd0c70099914fcd063135da3c580865e924c – before a8c695005bfe6569acd73d777ca298ddddd66105
Linux Linux 5.4

References