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OpenAdvisories
Critical · 9.4 CVE-2024-49996 EUVD-2024-43859GHSA-276c-3gx4-x9pr

cifs: Fix buffer overflow when parsing NFS reparse points

Published Oct 21, 2024 · Updated Aug 5, 2026 · Assigned by Linux

Vendor: Linux Product: Linux Package: kernel 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-6.8 Package: linux-aws-fips Package: linux-azure 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-6.11 Package: linux-azure-6.2 Package: linux-azure-6.5 Package: linux-azure-6.8 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-azure-nvidia Package: linux-bluefield Package: linux-fips Package: linux-gcp 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-6.11 Package: linux-gcp-6.2 Package: linux-gcp-6.5 Package: linux-gcp-6.8 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-6.8 Package: linux-hwe-edge Package: linux-ibm Package: linux-ibm-5.15 Package: linux-ibm-5.4 Package: linux-ibm-6.8 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-lowlatency-hwe-6.8 Package: linux-nvidia Package: linux-nvidia-6.11 Package: linux-nvidia-6.2 Package: linux-nvidia-6.5 Package: linux-nvidia-6.8 Package: linux-nvidia-lowlatency 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-6.11 Package: linux-oem-6.5 Package: linux-oem-6.8 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-oracle-6.8 Package: linux-raspi Package: linux-raspi-5.4 Package: linux-raspi-realtime Package: linux-raspi2 Package: linux-realtime Package: linux-realtime-6.8 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-riscv-6.8 Package: linux-starfive-5.19 Package: linux-starfive-6.2 Package: linux-starfive-6.5 Package: linux-vmware Package: linux-xilinx Package: linux-xilinx-zynqmp Platform: Linux Ecosystem: Azure Linux Ecosystem: Debian Ecosystem: Ubuntu

Description

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

cifs: Fix buffer overflow when parsing NFS reparse points

ReparseDataLength is sum of the InodeType size and DataBuffer size.
So to get DataBuffer size it is needed to subtract InodeType's size from
ReparseDataLength.

Function cifs_strndup_from_utf16() is currentlly accessing buf->DataBuffer
at position after the end of the buffer because it does not subtract
InodeType size from the length. Fix this problem and correctly subtract
variable len.

Member InodeType is present only when reparse buffer is large enough. Check
for ReparseDataLength before accessing InodeType to prevent another invalid
memory access.

Major and minor rdev values are present also only when reparse buffer is
large enough. Check for reparse buffer size before calling reparse_mkdev().

Affected products

VendorProductAffectedFixed
Linux Linux 5.3 5.4.287

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 6.11.4-1 —
Debian 13 linux 6.11.4-1 —
Debian 12 linux 6.1.123-1 —
Debian 11 linux 5.10.234-1 DLA-4075-1
Debian 11 linux-6.1 6.1.128-1~deb11u1 DLA-4076-1
ReleasePackageFixed inAdvisory
Ubuntu Nvidia-BlueField 22.04 LTS linux-bluefield 5.15.0-1062.64 —
Ubuntu 24.04 LTS linux 6.8.0-54.56 USN-7301-1
Ubuntu 24.04 LTS linux-aws 6.8.0-1023.25 USN-7311-1
Ubuntu 24.04 LTS linux-azure 6.8.0-1025.30 USN-7384-1
Ubuntu 24.04 LTS linux-azure-6.11 6.11.0-1012.12~24.04.1 —
Ubuntu 24.04 LTS linux-azure-nvidia 6.8.0-1014.15 USN-7468-1
Ubuntu 24.04 LTS linux-gcp 6.8.0-1024.26 USN-7304-1
Ubuntu 24.04 LTS linux-gcp-6.11 6.11.0-1011.11~24.04.1 —
Ubuntu 24.04 LTS linux-gke +1 6.8.0-1019.23 USN-7304-1, USN-7303-3
Ubuntu 24.04 LTS linux-gkeop 6.8.0-1006.8 USN-7304-1
Ubuntu 24.04 LTS linux-ibm 6.8.0-1022.22 USN-7385-1
Ubuntu 24.04 LTS linux-lowlatency 6.8.0-54.56.1 USN-7301-1
Ubuntu 24.04 LTS linux-nvidia 6.8.0-1022.25 USN-7303-1
Ubuntu 24.04 LTS linux-nvidia-6.11 6.11.0-1007.7 —
Ubuntu 24.04 LTS linux-nvidia-lowlatency 6.8.0-1022.25.2 USN-7303-1
Ubuntu 24.04 LTS linux-oem-6.11 6.11.0-1015.15 USN-7310-1
Ubuntu 24.04 LTS linux-oem-6.8 6.8.0-1024.24 USN-7386-1
Ubuntu 24.04 LTS linux-oracle 6.8.0-1020.21 USN-7303-2
Ubuntu 24.04 LTS linux-realtime No fix yet —
Ubuntu 24.04 LTS linux-riscv 6.8.0-53.55.1 —
Ubuntu 24.04 LTS linux-xilinx 6.8.0-1017.18 —
Ubuntu 22.04 LTS linux +1 5.15.0-135.146 USN-7387-1
Ubuntu 22.04 LTS linux-aws 5.15.0-1080.87 USN-7387-1
Ubuntu 22.04 LTS linux-aws-6.8 6.8.0-1023.25~22.04.1 USN-7311-1
Ubuntu 22.04 LTS linux-azure 5.15.0-1084.93 USN-7387-1
Ubuntu 22.04 LTS linux-azure-6.8 6.8.0-1025.30~22.04.1 USN-7384-2
Ubuntu 22.04 LTS linux-azure-fde 5.15.0-1084.93.1 —
Ubuntu 22.04 LTS linux-gcp 5.15.0-1079.88 USN-7387-1
Ubuntu 22.04 LTS linux-gcp-6.8 6.8.0-1024.26~22.04.1 USN-7303-3
Ubuntu 22.04 LTS linux-gke +1 5.15.0-1077.83 USN-7387-1
Ubuntu 22.04 LTS linux-gkeop 5.15.0-1062.70 USN-7387-1
Ubuntu 22.04 LTS linux-hwe-6.8 6.8.0-57.59~22.04.1 USN-7403-1
Ubuntu 22.04 LTS linux-ibm 5.15.0-1072.75 USN-7387-1
Ubuntu 22.04 LTS linux-ibm-6.8 6.8.0-1023.23~22.04.1 —
Ubuntu 22.04 LTS linux-intel-iot-realtime 5.15.0-1073.75 —
Ubuntu 22.04 LTS linux-intel-iotg 5.15.0-1075.81 USN-7387-1
Ubuntu 22.04 LTS linux-kvm 5.15.0-1076.81 USN-7388-1
Ubuntu 22.04 LTS linux-lowlatency-hwe-6.8 6.8.0-54.56.1~22.04.1 USN-7301-1
Ubuntu 22.04 LTS linux-nvidia 5.15.0-1074.75 USN-7387-1
Ubuntu 22.04 LTS linux-nvidia-6.8 6.8.0-1022.25~22.04.2 USN-7303-1
Ubuntu 22.04 LTS linux-nvidia-tegra 5.15.0-1033.33 USN-7389-1
Ubuntu 22.04 LTS linux-nvidia-tegra-igx 5.15.0-1021.21 USN-7389-1
Ubuntu 22.04 LTS linux-oracle-6.8 6.8.0-1020.21~22.04.1 USN-7303-2
Ubuntu 22.04 LTS linux-raspi 5.15.0-1074.77 USN-7387-1
Ubuntu 22.04 LTS linux-riscv +31 No fix yet —
Ubuntu 22.04 LTS linux-riscv-6.8 6.8.0-53.55.1~22.04.1 —
Ubuntu 22.04 LTS linux-xilinx-zynqmp 5.15.0-1044.48 USN-7390-1
Ubuntu 20.04 LTS linux 5.4.0-211.231 USN-7391-1
Ubuntu 20.04 LTS linux-aws 5.4.0-1142.152 USN-7392-3
Ubuntu 20.04 LTS linux-aws-5.15 5.15.0-1080.87~20.04.1 USN-7388-1
Ubuntu 20.04 LTS linux-azure 5.4.0-1147.154 USN-7392-1
Ubuntu 20.04 LTS linux-azure-5.15 5.15.0-1086.95~20.04.1 USN-7421-1
Ubuntu 20.04 LTS linux-azure-fde-5.15 5.15.0-1086.95~20.04.1.1 USN-7421-1
Ubuntu 20.04 LTS linux-bluefield 5.4.0-1101.108 USN-7392-1
Ubuntu 20.04 LTS linux-gcp 5.4.0-1145.154 USN-7392-1
Ubuntu 20.04 LTS linux-gcp-5.15 5.15.0-1081.90~20.04.1 USN-7459-2
Ubuntu 20.04 LTS linux-gke +28 No fix yet —
Ubuntu 20.04 LTS linux-hwe-5.15 5.15.0-136.147~20.04.1 USN-7407-1
Ubuntu 20.04 LTS linux-ibm 5.4.0-1088.93 USN-7392-1
Ubuntu 20.04 LTS linux-ibm-5.15 5.15.0-1074.77~20.04.1 USN-7458-1
Ubuntu 20.04 LTS linux-iot 5.4.0-1048.51 USN-7413-1
Ubuntu 20.04 LTS linux-kvm 5.4.0-1129.138 USN-7392-1
Ubuntu 20.04 LTS linux-lowlatency-hwe-5.15 5.15.0-135.146~20.04.1 USN-7387-1
Ubuntu 20.04 LTS linux-oracle 5.4.0-1140.150 USN-7392-1
Ubuntu 20.04 LTS linux-oracle-5.15 +1 5.15.0-1077.83~20.04.1 USN-7459-1, USN-7387-1
Ubuntu 20.04 LTS linux-raspi 5.4.0-1129.142 USN-7539-1
Ubuntu 20.04 LTS linux-riscv-5.15 5.15.0-1075.79~20.04.1 —
Ubuntu 20.04 LTS linux-xilinx-zynqmp 5.4.0-1060.64 USN-7392-1
Ubuntu 18.04 LTS linux-gcp +14 No fix yet —
Show 10 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
Ubuntu 16.04 LTS linux-hwe-edge No fix yet —
Ubuntu Pro Realtime 24.04 LTS linux-raspi-realtime 6.8.0-2018.19 —
Ubuntu Pro Realtime 24.04 LTS linux-realtime 6.8.1-1016.17 —
Ubuntu Pro Realtime 22.04 LTS linux-intel-iot-realtime 5.15.0-1073.75 USN-7387-3
Ubuntu Pro Realtime 22.04 LTS linux-realtime 5.15.0-1080.88 USN-7387-3
Ubuntu Pro Realtime 22.04 LTS linux-realtime-6.8 6.8.1-1016.17~22.04.1 —
Ubuntu Pro FIPS 20.04 LTS linux-fips +3 No fix yet —
Ubuntu Pro FIPS-updates 24.04 LTS linux-fips 6.8.0-78.78+fips1 —
Ubuntu Pro FIPS-updates 22.04 LTS linux-aws-fips 5.15.0-1080.87+fips1 USN-7387-2
Ubuntu Pro FIPS-updates 22.04 LTS linux-azure-fips 5.15.0-1083.92+fips1 USN-7387-2
Ubuntu Pro FIPS-updates 22.04 LTS linux-fips 5.15.0-135.146+fips1 USN-7387-2
Ubuntu Pro FIPS-updates 22.04 LTS linux-gcp-fips 5.15.0-1079.88+fips1 USN-7387-2
Ubuntu Pro FIPS-updates 20.04 LTS linux-aws-fips 5.4.0-1142.153+fips1 USN-7392-4
Ubuntu Pro FIPS-updates 20.04 LTS linux-azure-fips 5.4.0-1147.154+fips1 USN-7392-2
Ubuntu Pro FIPS-updates 20.04 LTS linux-fips 5.4.0-1116.126 USN-7393-1
Ubuntu Pro FIPS-updates 20.04 LTS linux-gcp-fips 5.4.0-1145.154+fips1 USN-7392-2
Ubuntu Pro FIPS-preview 22.04 LTS linux-fips +3 No fix yet —
Ubuntu Pro 20.04 LTS linux-nvidia-tegra-5.15 5.15.0-1039.39~20.04.1 —
Ubuntu Pro 18.04 LTS linux-aws-5.4 5.4.0-1142.152~18.04.1 USN-7401-1
Ubuntu Pro 18.04 LTS linux-azure-5.4 5.4.0-1147.154~18.04.1 USN-7392-1
Ubuntu Pro 18.04 LTS linux-gcp-5.4 5.4.0-1145.154~18.04.1 USN-7392-1
Ubuntu Pro 18.04 LTS linux-hwe-5.4 5.4.0-211.231~18.04.1 USN-7391-1
Ubuntu Pro 18.04 LTS linux-ibm-5.4 5.4.0-1090.95~18.04.1 USN-7463-1
Ubuntu Pro 18.04 LTS linux-oracle-5.4 5.4.0-1140.149~18.04.1 USN-7392-1
Ubuntu Pro 18.04 LTS linux-raspi-5.4 5.4.0-1129.142~18.04.1 USN-7540-1
ReleasePackageFixed inAdvisory
SLES 15 SP7 kernel-64kb +6 6.4.0-150700.53.16.1 SUSE-SU-2025:03290-1
SLES 15 SP7 kernel-azure +2 6.4.0-150700.20.11.1 SUSE-SU-2025:03011-1
SLES 15 SP7 kernel-default-base 6.4.0-150700.53.16.1.150700.17.11.2 SUSE-SU-2025:03290-1
SLES 15 SP6 kernel-64kb +6 6.4.0-150600.23.30.1 SUSE-SU-2025:03301-1, SUSE-SU-2024:4318-1
SLES 15 SP6 kernel-azure 6.4.0-150600.8.17.2 SUSE-SU-2024:3984-1
SLES 15 SP6 kernel-coco +3 6.4.0-15061.9.coco15sp6.1 SUSE-SU-2024:4387-1
SLES 15 SP6 kernel-default-base 6.4.0-150600.23.30.1.150600.12.12.6 SUSE-SU-2025:03301-1, SUSE-SU-2024:4318-1
SLES 15 SP6 kernel-syms-azure +1 6.4.0-150600.8.17.1 SUSE-SU-2024:3984-1
SLES 15 SP5 kernel-64kb +6 5.14.21-150500.55.88.1 SUSE-SU-2024:4364-1
SLES 15 SP5 kernel-azure +2 5.14.21-150500.33.72.1 SUSE-SU-2024:3983-1
SLES 15 SP5 kernel-default-base 5.14.21-150500.55.88.1.150500.6.39.4 SUSE-SU-2024:4364-1
SLES 12 SP5 kernel-syms +2 4.12.14-122.234.1 SUSE-SU-2025:0034-1
Show 10 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
SLE Micro 6.1 kernel-default-base 6.4.0-24.1.21.4 SUSE-SU-2025:20247-1
SLE Micro 6.1 kernel-livepatch-MICRO-6-0-RT_Update_4 1-1.1 SUSE-SU-2025:20246-1
SLE Micro 6.1 kernel-livepatch-MICRO-6-0_Update_4 1-1.2 SUSE-SU-2025:20247-1
SLE Micro 6.1 kernel-rt +1 6.4.0-22.1 SUSE-SU-2025:20246-1
SLE Micro 6.1 kernel-source +2 6.4.0-24.1 SUSE-SU-2025:20247-1
SLE Micro 6.0 kernel-default-base 6.4.0-24.1.21.4 SUSE-SU-2025:20164-1
SLE Micro 6.0 kernel-livepatch-MICRO-6-0-RT_Update_4 1-1.1 SUSE-SU-2025:20163-1
SLE Micro 6.0 kernel-livepatch-MICRO-6-0_Update_4 1-1.2 SUSE-SU-2025:20164-1
SLE Micro 6.0 kernel-rt +1 6.4.0-22.1 SUSE-SU-2025:20163-1
SLE Micro 6.0 kernel-source +2 6.4.0-24.1 SUSE-SU-2025:20164-1
SLE Micro 5.5 kernel-default 5.14.21-150500.55.88.1 SUSE-SU-2024:4364-1
SLE Micro 5.5 kernel-default-base 5.14.21-150500.55.88.1.150500.6.39.4 SUSE-SU-2024:4364-1
SLE Micro 5.5 kernel-rt +1 5.14.21-150500.13.76.1 SUSE-SU-2024:3985-1
SLE Live Patching 15 SP7 kernel-default 6.4.0-150700.53.16.1 SUSE-SU-2025:03290-1
SLE Live Patching 15 SP7 kernel-livepatch-SLE15-SP7-RT_Update_4 1-150700.1.3.2 SUSE-SU-2025:03382-1
SLE Live Patching 15 SP7 kernel-livepatch-SLE15-SP7_Update_4 1-150700.15.3.2 SUSE-SU-2025:03290-1
SLE Live Patching 15 SP6 kernel-default 6.4.0-150600.23.30.1 SUSE-SU-2025:03301-1, SUSE-SU-2024:4318-1
SLE Live Patching 15 SP6 kernel-livepatch-SLE15-SP6-RT_Update_5 +1 1-150600.1.3.1 SUSE-SU-2025:03272-1, SUSE-SU-2024:3986-1
SLE Live Patching 15 SP6 kernel-livepatch-SLE15-SP6_Update_15 1-150600.13.3.2 SUSE-SU-2025:03301-1
SLE Live Patching 15 SP6 kernel-livepatch-SLE15-SP6_Update_6 1-150600.13.3.5 SUSE-SU-2024:4318-1
SLE Live Patching 15 SP5 kernel-default 5.14.21-150500.55.88.1 SUSE-SU-2024:4364-1
SLE Live Patching 15 SP5 kernel-livepatch-SLE15-SP5-RT_Update_22 1-150500.11.3.1 SUSE-SU-2024:3985-1
SLE Live Patching 15 SP5 kernel-livepatch-SLE15-SP5_Update_21 1-150500.11.5.1 SUSE-SU-2024:4364-1
SLE Live Patching 12 SP5 kernel-default 4.12.14-122.234.1 SUSE-SU-2024:4100-1
SLE Live Patching 12 SP5 kgraft-patch-SLE12-SP5_Update_62 1-8.3.1 SUSE-SU-2024:4100-1
SUSE Real Time Module 15 SP7 kernel-rt +2 6.4.0-150700.7.16.1 SUSE-SU-2025:03382-1
SUSE Real Time Module 15 SP6 kernel-rt +3 6.4.0-150600.10.17.1 SUSE-SU-2025:03272-1, SUSE-SU-2024:3986-1
SUSE Real Time Module 15 SP5 kernel-rt +3 5.14.21-150500.13.76.1 SUSE-SU-2024:3985-1
ReleasePackageFixed inAdvisory
openSUSE Tumbleweed kernel-source 6.11.8-1.1 openSUSE-SU-2024:14500-1
openSUSE Tumbleweed kernel-source-longterm 6.12.11-1.1 openSUSE-SU-2025:14705-1
openSUSE Leap 15.6 dtb-aarch64 +10 6.4.0-150600.23.30.1 SUSE-SU-2025:03301-1, SUSE-SU-2024:4318-1
openSUSE Leap 15.6 kernel-azure 6.4.0-150600.8.17.2 SUSE-SU-2024:3984-1
openSUSE Leap 15.6 kernel-default-base 6.4.0-150600.23.30.1.150600.12.12.6 SUSE-SU-2025:03301-1, SUSE-SU-2024:4318-1
openSUSE Leap 15.6 kernel-rt +3 6.4.0-150600.10.17.1 SUSE-SU-2025:03272-1, SUSE-SU-2024:3986-1
openSUSE Leap 15.6 kernel-syms-azure +1 6.4.0-150600.8.17.1 SUSE-SU-2024:3984-1
openSUSE Leap 15.5 kernel-azure +2 5.14.21-150500.33.72.1 SUSE-SU-2024:3983-1
openSUSE Leap 15.5 kernel-rt +3 5.14.21-150500.13.76.1 SUSE-SU-2024:3985-1
Show 1 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
openSUSE Leap Micro 5.5 kernel-rt 5.14.21-150500.13.76.1 SUSE-SU-2024:3985-1

Amazon Linux

ReleasePackageFixed inAdvisory
Amazon Linux 2023 kernel-livepatch-6.1.119-129.201 1.0-0.amzn2023 ALAS2023-2025-802, ALAS2023-2024-778
Amazon Linux 2023 perf +14 6.1.119-129.201.amzn2023 ALAS2023-2025-802, ALAS2023-2024-778

Azure Linux

ReleasePackageFixed inAdvisory
Azure Linux 2 (CBL-Mariner) kernel 5.15.176.3-1 —

Oracle Linux

ReleasePackageFixed inAdvisory
Oracle Linux 8 bpftool +13 5.15.0-305.176.4.el9uek ELSA-2025-20095
Oracle Linux 7 kernel-uek +6 5.4.17-2136.340.4.1.el8uek ELSA-2025-20100
Oracle Linux 7 kernel-uek-tools 5.4.17-2136.340.4.1.el7uek ELSA-2025-20100

Advisories 50

References