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High · 7.5 CVE-2024-26851 EUVD-2024-24113GHSA-w255-5hjq-7p69

netfilter: nf_conntrack_h323: Add protection for bmp length out of range

Published Apr 17, 2024 · Updated Oct 15, 2026 · Assigned by Linux

Vendor: Linux Product: Linux Package: linux Package: linux Package: linux-allwinner-5.19 Package: linux-aws Package: linux-aws-5.0 Package: linux-aws-5.11 Package: linux-aws-5.13 Package: linux-aws-5.15 Package: linux-aws-5.19 Package: linux-aws-5.3 Package: linux-aws-5.4 Package: linux-aws-5.8 Package: linux-aws-6.2 Package: linux-aws-6.5 Package: linux-aws-fips Package: linux-aws-hwe Package: linux-azure Package: linux-azure-4.15 Package: linux-azure-5.11 Package: linux-azure-5.13 Package: linux-azure-5.15 Package: linux-azure-5.19 Package: linux-azure-5.3 Package: linux-azure-5.4 Package: linux-azure-5.8 Package: linux-azure-6.2 Package: linux-azure-6.5 Package: linux-azure-edge Package: linux-azure-fde Package: linux-azure-fde-5.19 Package: linux-azure-fde-6.2 Package: linux-azure-fips Package: linux-bluefield Package: linux-fips Package: linux-gcp Package: linux-gcp-4.15 Package: linux-gcp-5.11 Package: linux-gcp-5.13 Package: linux-gcp-5.15 Package: linux-gcp-5.19 Package: linux-gcp-5.3 Package: linux-gcp-5.4 Package: linux-gcp-5.8 Package: linux-gcp-6.2 Package: linux-gcp-6.5 Package: linux-gcp-fips Package: linux-gke Package: linux-gke-4.15 Package: linux-gke-5.15 Package: linux-gke-5.4 Package: linux-gkeop Package: linux-gkeop-5.15 Package: linux-gkeop-5.4 Package: linux-hwe Package: linux-hwe-5.11 Package: linux-hwe-5.13 Package: linux-hwe-5.15 Package: linux-hwe-5.19 Package: linux-hwe-5.4 Package: linux-hwe-5.8 Package: linux-hwe-6.2 Package: linux-hwe-6.5 Package: linux-hwe-edge Package: linux-ibm Package: linux-ibm-5.15 Package: linux-ibm-5.4 Package: linux-intel-5.13 Package: linux-intel-iot-realtime Package: linux-intel-iotg Package: linux-intel-iotg-5.15 Package: linux-iot Package: linux-kvm Package: linux-lowlatency Package: linux-lowlatency-hwe-5.15 Package: linux-lowlatency-hwe-5.19 Package: linux-lowlatency-hwe-6.2 Package: linux-lowlatency-hwe-6.5 Package: linux-lts-xenial Package: linux-nvidia Package: linux-nvidia-6.2 Package: linux-nvidia-6.5 Package: linux-nvidia-tegra Package: linux-nvidia-tegra-5.15 Package: linux-nvidia-tegra-igx Package: linux-oem Package: linux-oem-5.10 Package: linux-oem-5.13 Package: linux-oem-5.14 Package: linux-oem-5.17 Package: linux-oem-5.6 Package: linux-oem-6.0 Package: linux-oem-6.1 Package: linux-oem-6.5 Package: linux-oracle Package: linux-oracle-5.0 Package: linux-oracle-5.11 Package: linux-oracle-5.13 Package: linux-oracle-5.15 Package: linux-oracle-5.3 Package: linux-oracle-5.4 Package: linux-oracle-5.8 Package: linux-oracle-6.5 Package: linux-raspi Package: linux-raspi-5.4 Package: linux-raspi-realtime Package: linux-raspi2 Package: linux-realtime Package: linux-riscv Package: linux-riscv-5.11 Package: linux-riscv-5.15 Package: linux-riscv-5.19 Package: linux-riscv-5.8 Package: linux-riscv-6.5 Package: linux-starfive-5.19 Package: linux-starfive-6.2 Package: linux-starfive-6.5 Package: linux-vmware Package: linux-xilinx-zynqmp Platform: Linux Ecosystem: Debian Ecosystem: Ubuntu

Description

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

netfilter: nf_conntrack_h323: Add protection for bmp length out of range

UBSAN load reports an exception of BRK#5515 SHIFT_ISSUE:Bitwise shifts
that are out of bounds for their data type.

vmlinux get_bitmap(b=75) + 712
<net/netfilter/nf_conntrack_h323_asn1.c:0>
vmlinux decode_seq(bs=0xFFFFFFD008037000, f=0xFFFFFFD008037018, level=134443100) + 1956
<net/netfilter/nf_conntrack_h323_asn1.c:592>
vmlinux decode_choice(base=0xFFFFFFD0080370F0, level=23843636) + 1216
<net/netfilter/nf_conntrack_h323_asn1.c:814>
vmlinux decode_seq(f=0xFFFFFFD0080371A8, level=134443500) + 812
<net/netfilter/nf_conntrack_h323_asn1.c:576>
vmlinux decode_choice(base=0xFFFFFFD008037280, level=0) + 1216
<net/netfilter/nf_conntrack_h323_asn1.c:814>
vmlinux DecodeRasMessage() + 304
<net/netfilter/nf_conntrack_h323_asn1.c:833>
vmlinux ras_help() + 684
<net/netfilter/nf_conntrack_h323_main.c:1728>
vmlinux nf_confirm() + 188
<net/netfilter/nf_conntrack_proto.c:137>

Due to abnormal data in skb->data, the extension bitmap length
exceeds 32 when decoding ras message then uses the length to make
a shift operation. It will change into negative after several loop.
UBSAN load could detect a negative shift as an undefined behaviour
and reports exception.
So we add the protection to avoid the length exceeding 32. Or else
it will return out of range error and stop decoding.

Affected products

VendorProductAffectedFixed
Linux Linux 2.6.17 4.19.310

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

ReleasePackageFixed inAdvisory
Debian 14 linux 6.7.12-1 —
Debian 13 linux 6.7.12-1 —
Debian 12 linux 6.1.82-1 —
Debian 11 linux 5.10.216-1 DSA-5681-1
Debian 10 linux 4.19.316-1 DLA-3840-1
Debian 10 linux-5.10 5.10.216-1~deb10u1 DLA-3842-1
ReleasePackageFixed inAdvisory
Ubuntu Nvidia-BlueField 22.04 LTS linux-bluefield 5.15.0-1044.46 —
Ubuntu 22.04 LTS linux 5.15.0-112.122 USN-6820-1
Ubuntu 22.04 LTS linux-aws 5.15.0-1063.69 USN-6821-3
Ubuntu 22.04 LTS linux-azure 5.15.0-1066.75 USN-6821-4
Ubuntu 22.04 LTS linux-azure-fde 5.15.0-1067.76.1 USN-6821-4
Ubuntu 22.04 LTS linux-gcp 5.15.0-1062.70 USN-6820-1
Ubuntu 22.04 LTS linux-gke 5.15.0-1060.66 USN-6821-1
Ubuntu 22.04 LTS linux-gkeop 5.15.0-1046.53 USN-6821-2
Ubuntu 22.04 LTS linux-ibm 5.15.0-1056.59 USN-6821-1
Ubuntu 22.04 LTS linux-intel-iotg 5.15.0-1058.64 USN-6821-1
Ubuntu 22.04 LTS linux-kvm 5.15.0-1060.65 USN-6821-2
Ubuntu 22.04 LTS linux-lowlatency 5.15.0-110.120 USN-6820-1
Ubuntu 22.04 LTS linux-nvidia 5.15.0-1058.59 USN-6820-2
Ubuntu 22.04 LTS linux-nvidia-tegra 5.15.0-1026.26 —
Ubuntu 22.04 LTS linux-nvidia-tegra-igx 5.15.0-1015.15 —
Ubuntu 22.04 LTS linux-oracle 5.15.0-1061.67 USN-6821-1
Ubuntu 22.04 LTS linux-raspi 5.15.0-1058.61 USN-6919-1
Ubuntu 22.04 LTS linux-riscv +31 No fix yet —
Ubuntu 22.04 LTS linux-xilinx-zynqmp 5.15.0-1030.34 USN-6820-1
Ubuntu 20.04 LTS linux 5.4.0-189.209 USN-6896-1
Ubuntu 20.04 LTS linux-aws 5.4.0-1128.138 USN-6896-5
Ubuntu 20.04 LTS linux-aws-5.15 5.15.0-1063.69~20.04.1 USN-6821-3
Ubuntu 20.04 LTS linux-azure 5.4.0-1133.140 USN-6896-1
Ubuntu 20.04 LTS linux-azure-5.15 5.15.0-1065.74~20.04.1 —
Ubuntu 20.04 LTS linux-bluefield 5.4.0-1088.95 USN-6896-1
Ubuntu 20.04 LTS linux-gcp 5.4.0-1132.141 USN-6896-1
Ubuntu 20.04 LTS linux-gcp-5.15 5.15.0-1062.70~20.04.1 USN-6820-1
Ubuntu 20.04 LTS linux-gke +26 No fix yet —
Ubuntu 20.04 LTS linux-gkeop 5.4.0-1095.99 USN-6896-1
Ubuntu 20.04 LTS linux-gkeop-5.15 5.15.0-1046.53~20.04.1 USN-6821-2
Ubuntu 20.04 LTS linux-hwe-5.15 5.15.0-113.123~20.04.1 USN-6871-1
Ubuntu 20.04 LTS linux-ibm 5.4.0-1075.80 USN-6896-1
Ubuntu 20.04 LTS linux-ibm-5.15 5.15.0-1057.60~20.04.1 USN-6892-1
Ubuntu 20.04 LTS linux-intel-iotg-5.15 5.15.0-1058.64~20.04.1 USN-6828-1
Ubuntu 20.04 LTS linux-iot 5.4.0-1040.41 USN-6896-5
Ubuntu 20.04 LTS linux-kvm 5.4.0-1116.123 USN-6896-1
Ubuntu 20.04 LTS linux-lowlatency-hwe-5.15 5.15.0-110.120~20.04.1 USN-6820-1
Ubuntu 20.04 LTS linux-nvidia-tegra-5.15 5.15.0-1027.27~20.04.1 —
Ubuntu 20.04 LTS linux-oracle 5.4.0-1127.136 USN-6896-3
Ubuntu 20.04 LTS linux-oracle-5.15 5.15.0-1061.67~20.04.1 —
Ubuntu 20.04 LTS linux-raspi 5.4.0-1112.124 USN-6896-4
Ubuntu 20.04 LTS linux-riscv-5.15 5.15.0-1059.63~20.04.1 —
Ubuntu 20.04 LTS linux-xilinx-zynqmp 5.4.0-1047.51 USN-6896-3
Ubuntu 18.04 LTS linux-gcp +14 No fix yet —
Ubuntu 16.04 LTS linux-hwe-edge No fix yet —
Show 13 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
Ubuntu Pro Realtime 24.04 LTS linux-raspi-realtime 6.8.0-2002.2 —
Ubuntu Pro Realtime 22.04 LTS linux-intel-iot-realtime 5.15.0-1056.58 —
Ubuntu Pro Realtime 22.04 LTS linux-realtime 5.15.0-1064.72 —
Ubuntu Pro FIPS 20.04 LTS linux-fips +3 No fix yet —
Ubuntu Pro FIPS 18.04 LTS linux-fips +3 No fix yet —
Ubuntu Pro FIPS 16.04 LTS linux-fips No fix yet —
Ubuntu Pro FIPS-updates 22.04 LTS linux-aws-fips 5.15.0-1063.69+fips1 —
Ubuntu Pro FIPS-updates 22.04 LTS linux-azure-fips 5.15.0-1065.74+fips1 —
Ubuntu Pro FIPS-updates 22.04 LTS linux-fips 5.15.0-111.121+fips1 —
Ubuntu Pro FIPS-updates 22.04 LTS linux-gcp-fips 5.15.0-1062.70+fips1 —
Ubuntu Pro FIPS-updates 20.04 LTS linux-aws-fips 5.4.0-1128.138+fips1 —
Ubuntu Pro FIPS-updates 20.04 LTS linux-azure-fips 5.4.0-1133.140+fips1 —
Ubuntu Pro FIPS-updates 20.04 LTS linux-fips 5.4.0-1102.112 —
Ubuntu Pro FIPS-updates 20.04 LTS linux-gcp-fips 5.4.0-1132.141+fips1 —
Ubuntu Pro FIPS-updates 18.04 LTS linux-aws-fips 4.15.0-2111.117 —
Ubuntu Pro FIPS-updates 18.04 LTS linux-azure-fips 4.15.0-2090.96 —
Ubuntu Pro FIPS-updates 18.04 LTS linux-fips 4.15.0-1127.138 —
Ubuntu Pro FIPS-updates 18.04 LTS linux-gcp-fips 4.15.0-2074.79 —
Ubuntu Pro FIPS-updates 16.04 LTS linux-fips 4.4.0-1105.112 —
Ubuntu Pro FIPS-preview 22.04 LTS linux-fips +3 No fix yet —
Ubuntu Pro 18.04 LTS linux 4.15.0-229.241 USN-7028-1
Ubuntu Pro 18.04 LTS linux-aws 4.15.0-1173.186 USN-7028-1
Ubuntu Pro 18.04 LTS linux-aws-5.4 5.4.0-1128.138~18.04.1 USN-6896-5
Ubuntu Pro 18.04 LTS linux-azure-4.15 4.15.0-1181.196 USN-7028-1
Ubuntu Pro 18.04 LTS linux-azure-5.4 5.4.0-1133.140~18.04.1 USN-6896-1
Ubuntu Pro 18.04 LTS linux-gcp-4.15 4.15.0-1166.183 USN-7028-1
Ubuntu Pro 18.04 LTS linux-gcp-5.4 5.4.0-1132.141~18.04.1 USN-6896-1
Ubuntu Pro 18.04 LTS linux-hwe-5.4 5.4.0-189.209~18.04.1 USN-6896-2
Ubuntu Pro 18.04 LTS linux-ibm-5.4 5.4.0-1075.80~18.04.1 USN-6896-1
Ubuntu Pro 18.04 LTS linux-kvm 4.15.0-1156.161 USN-7028-1
Ubuntu Pro 18.04 LTS linux-oracle 4.15.0-1135.146 USN-7028-1
Ubuntu Pro 18.04 LTS linux-oracle-5.4 5.4.0-1127.136~18.04.1 USN-6896-2
Ubuntu Pro 18.04 LTS linux-raspi-5.4 5.4.0-1112.124~18.04.1 USN-6896-4
Ubuntu Pro 16.04 LTS linux 4.4.0-259.293 USN-7039-1
Ubuntu Pro 16.04 LTS linux-aws 4.4.0-1174.189 USN-7039-1
Ubuntu Pro 16.04 LTS linux-aws-hwe 4.15.0-1173.186~16.04.1 USN-7028-1
Ubuntu Pro 16.04 LTS linux-azure 4.15.0-1181.196~16.04.1 USN-7028-1
Ubuntu Pro 16.04 LTS linux-gcp 4.15.0-1166.183~16.04.1 USN-7028-1
Ubuntu Pro 16.04 LTS linux-hwe 4.15.0-229.241~16.04.1 USN-7028-1
Ubuntu Pro 16.04 LTS linux-kvm 4.4.0-1137.147 USN-7039-1
Ubuntu Pro 16.04 LTS linux-oracle 4.15.0-1135.146~16.04.1 USN-7028-1
Ubuntu Pro 14.04 LTS linux No fix yet —
Ubuntu Pro 14.04 LTS linux-aws 4.4.0-1136.142 USN-7039-1
Ubuntu Pro 14.04 LTS linux-azure 4.15.0-1181.196~14.04.1 USN-7028-2
Ubuntu Pro 14.04 LTS linux-lts-xenial 4.4.0-259.293~14.04.1 USN-7039-1
ReleasePackageFixed inAdvisory
RHEL 8 kernel-rt +12 4.18.0-553.27.1.rt7.368.el8_10 RHSA-2024:8870
RHEL 8 perf +26 4.18.0-553.27.1.el8_10 RHSA-2024:8856
Show 2 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
RHEL 9.4 EUS bpftool 7.3.0-427.61.1.el9_4 RHSA-2025:3215
RHEL 9.4 EUS rv +64 5.14.0-427.61.1.el9_4 RHSA-2025:3215
RHEL 8.8 EUS perf +26 4.18.0-477.74.1.el8_8 RHSA-2024:6993

AlmaLinux

Errata ↗
ReleasePackageFixed inAdvisory
AlmaLinux 8 kernel-rt +9 4.18.0-553.27.1.rt7.368.el8_10 ALSA-2024:8870
AlmaLinux 8 perf +24 4.18.0-553.27.1.el8_10 ALSA-2024:8856

Rocky Linux

Errata ↗
ReleasePackageFixed inAdvisory
Rocky Linux 8 kernel 4.18.0-553.27.1.el8_10 RLSA-2024:8856
Rocky Linux 8 kernel-rt 4.18.0-553.27.1.rt7.368.el8_10 RLSA-2024:8870
ReleasePackageFixed inAdvisory
SLES 15 SP6 kernel-64kb +6 6.4.0-150600.23.22.1 SUSE-SU-2024:3383-1
SLES 15 SP6 kernel-azure +2 6.4.0-150600.8.11.1 SUSE-SU-2024:3194-1
SLES 15 SP6 kernel-default-base 6.4.0-150600.23.22.1.150600.12.8.3 SUSE-SU-2024:3383-1
SLES 15 SP5 kernel-64kb +4 5.14.21-150500.55.80.2 SUSE-SU-2024:3483-1
SLES 15 SP5 kernel-azure +2 5.14.21-150500.33.66.1 SUSE-SU-2024:3190-1
SLES 15 SP5 kernel-default-base 5.14.21-150500.55.80.2.150500.6.35.6 SUSE-SU-2024:3483-1
SLES 15 SP5 kernel-syms +1 5.14.21-150500.55.80.1 SUSE-SU-2024:3483-1
SLES 12 SP5 kernel-azure +2 4.12.14-16.197.1 SUSE-SU-2024:3252-1
SLES 12 SP5 kernel-docs +1 4.12.14-122.228.2 SUSE-SU-2024:3251-1
SLES 12 SP5 kernel-syms +2 4.12.14-122.228.1 SUSE-SU-2024:3251-1
Show 9 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
SLES for SAP 12 SP5 kernel-azure +2 4.12.14-16.197.1 SUSE-SU-2024:3252-1
SLES for SAP 12 SP5 kernel-syms +2 4.12.14-122.228.1 SUSE-SU-2024:3251-1
SLE Real Time 12 SP5 kernel-rt +3 4.12.14-10.200.1 SUSE-SU-2024:3189-1
SLE Micro 6.0 kernel-default-base 6.4.0-17.1.1.51 SUSE-SU-2025:20044-1
SLE Micro 6.0 kernel-livepatch-MICRO-6-0_Update_2 +1 1-1.1 SUSE-SU-2025:20047-1, SUSE-SU-2025:20044-1
SLE Micro 6.0 kernel-rt +1 6.4.0-10.1 SUSE-SU-2025:20047-1
SLE Micro 6.0 kernel-source +2 6.4.0-19.1 SUSE-SU-2025:20044-1
SLE Micro 5.5 kernel-default 5.14.21-150500.55.80.2 SUSE-SU-2024:3483-1
SLE Micro 5.5 kernel-default-base 5.14.21-150500.55.80.2.150500.6.35.6 SUSE-SU-2024:3483-1
SLE Micro 5.5 kernel-rt +1 5.14.21-150500.13.67.3 SUSE-SU-2024:3209-1
SLE Live Patching 15 SP6 kernel-default 6.4.0-150600.23.22.1 SUSE-SU-2024:3383-1
SLE Live Patching 15 SP6 kernel-livepatch-SLE15-SP6-RT_Update_2 1-150600.1.3.2 SUSE-SU-2024:3195-1
SLE Live Patching 15 SP6 kernel-livepatch-SLE15-SP6_Update_4 1-150600.13.3.3 SUSE-SU-2024:3383-1
SLE Live Patching 15 SP5 kernel-default 5.14.21-150500.55.80.2 SUSE-SU-2024:3483-1
SLE Live Patching 15 SP5 kernel-livepatch-SLE15-SP5_Update_19 +1 1-150500.11.3.2 SUSE-SU-2024:3483-1, SUSE-SU-2024:3209-1
SLE Live Patching 12 SP5 kernel-default 4.12.14-122.228.1 SUSE-SU-2024:3251-1
SLE Live Patching 12 SP5 kgraft-patch-SLE12-SP5_Update_60 1-8.3.1 SUSE-SU-2024:3251-1
SUSE Real Time Module 15 SP6 kernel-rt +2 6.4.0-150600.10.8.3 SUSE-SU-2024:3195-1
SUSE Real Time Module 15 SP6 kernel-syms-rt 6.4.0-150600.10.8.1 SUSE-SU-2024:3195-1
SUSE Real Time Module 15 SP5 kernel-rt +2 5.14.21-150500.13.67.3 SUSE-SU-2024:3209-1
SUSE Real Time Module 15 SP5 kernel-syms-rt 5.14.21-150500.13.67.1 SUSE-SU-2024:3209-1
ReleasePackageFixed inAdvisory
openSUSE Leap 15.6 dtb-aarch64 +10 6.4.0-150600.23.22.1 SUSE-SU-2024:3383-1
openSUSE Leap 15.6 kernel-azure +2 6.4.0-150600.8.11.1 SUSE-SU-2024:3194-1
openSUSE Leap 15.6 kernel-default-base 6.4.0-150600.23.22.1.150600.12.8.3 SUSE-SU-2024:3383-1
openSUSE Leap 15.6 kernel-rt +2 6.4.0-150600.10.8.3 SUSE-SU-2024:3195-1
openSUSE Leap 15.6 kernel-syms-rt 6.4.0-150600.10.8.1 SUSE-SU-2024:3195-1
openSUSE Leap 15.5 dtb-aarch64 +3 5.14.21-150500.55.80.1 SUSE-SU-2024:3483-1
openSUSE Leap 15.5 kernel-64kb +6 5.14.21-150500.55.80.2 SUSE-SU-2024:3483-1
openSUSE Leap 15.5 kernel-azure +2 5.14.21-150500.33.66.1 SUSE-SU-2024:3190-1
openSUSE Leap 15.5 kernel-default-base 5.14.21-150500.55.80.2.150500.6.35.6 SUSE-SU-2024:3483-1
openSUSE Leap 15.5 kernel-rt +2 5.14.21-150500.13.67.3 SUSE-SU-2024:3209-1
openSUSE Leap 15.5 kernel-syms-rt 5.14.21-150500.13.67.1 SUSE-SU-2024:3209-1
Show 1 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
openSUSE Leap Micro 5.5 kernel-default 5.14.21-150500.55.80.2 SUSE-SU-2024:3483-1
openSUSE Leap Micro 5.5 kernel-default-base 5.14.21-150500.55.80.2.150500.6.35.6 SUSE-SU-2024:3483-1
openSUSE Leap Micro 5.5 kernel-rt 5.14.21-150500.13.67.3 SUSE-SU-2024:3209-1

Amazon Linux

ReleasePackageFixed inAdvisory
Amazon Linux 2023 kernel-livepatch-6.1.82-99.168 1.0-0.amzn2023 ALAS2023-2024-784, ALAS2023-2024-603
Amazon Linux 2023 perf +14 6.1.82-99.168.amzn2023 ALAS2023-2024-784, ALAS2023-2024-603
Amazon Linux 2 kernel-livepatch-4.14.343-259.562 1.0-0.amzn2 ALAS2-2024-2549
Amazon Linux 2 perf +8 4.14.343-259.562.amzn2 ALAS2-2024-2549

Oracle Linux

ReleasePackageFixed inAdvisory
Oracle Linux 8 perf +19 4.18.0-553.27.1.el8_10 ELSA-2024-8856

Advisories 47

References