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OpenAdvisories
Medium · 6.0 CVE-2023-4273 EUVD-2023-54144GHSA-wm25-c777-f2h3

Kernel: exfat: stack overflow in exfat_get_uniname_from_ext_entry

Published Aug 9, 2023 · Updated Nov 7, 2026 · Assigned by redhat

Vendor: Red Hat Product: Red Hat Enterprise Linux 6 Product: Red Hat Enterprise Linux 7 Product: Red Hat Enterprise Linux 8 Product: Red Hat Enterprise Linux 9 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-5.8 Package: linux-aws-6.2 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-5.8 Package: linux-azure-6.2 Package: linux-azure-edge Package: linux-azure-fde Package: linux-azure-fde-5.19 Package: linux-azure-fde-6.2 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-5.8 Package: linux-gcp-6.2 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-5.8 Package: linux-hwe-6.2 Package: linux-hwe-edge Package: linux-ibm Package: linux-ibm-5.15 Package: linux-intel-5.13 Package: linux-intel-iot-realtime Package: linux-intel-iotg Package: linux-intel-iotg-5.15 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-nvidia Package: linux-nvidia-6.2 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-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-5.8 Package: linux-raspi 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-starfive-5.19 Package: linux-vmware Package: linux-xilinx-zynqmp Platform: Linux Ecosystem: Azure Linux Ecosystem: Debian Ecosystem: Ubuntu

Description

A flaw was found in the exFAT driver of the Linux kernel. The vulnerability exists in the implementation of the file name reconstruction function, which is responsible for reading file name entries from a directory index and merging file name parts belonging to one file into a single long file name. Since the file name characters are copied into a stack variable, a local privileged attacker could use this flaw to overflow the kernel stack.

Affected products

VendorProductAffectedFixed
Red Hat Red Hat Enterprise Linux 9 — —
Red Hat Red Hat Enterprise Linux 6 — —
Red Hat Red Hat Enterprise Linux 7 — —
Red Hat Red Hat Enterprise Linux 8 — —

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 6.4.11-1 —
Debian 13 linux 6.4.11-1 —
Debian 12 linux 6.1.52-1 DSA-5492-1
Debian 11 linux 5.10.191-1 DSA-5480-1
Debian 10 linux-5.10 5.10.197-1~deb10u1 DLA-3623-1
ReleasePackageFixed inAdvisory
Ubuntu Nvidia-BlueField 22.04 LTS linux-bluefield 5.15.0-1027.29 —
Ubuntu 24.04 LTS linux-raspi-realtime No fix yet —
Ubuntu 22.04 LTS linux 5.15.0-86.96 USN-6416-1
Ubuntu 22.04 LTS linux-aws 5.15.0-1047.52 USN-6416-1
Ubuntu 22.04 LTS linux-aws-6.2 6.2.0-1013.13~22.04.1 USN-6412-1
Ubuntu 22.04 LTS linux-azure 5.15.0-1049.56 USN-6416-1
Ubuntu 22.04 LTS linux-azure-6.2 +1 6.2.0-1014.14~22.04.1 USN-6412-1
Ubuntu 22.04 LTS linux-azure-fde 5.15.0-1049.56.1 USN-6416-1
Ubuntu 22.04 LTS linux-azure-fde-6.2 6.2.0-1014.14~22.04.1.1 USN-6412-1
Ubuntu 22.04 LTS linux-gcp 5.15.0-1044.52 USN-6416-1
Ubuntu 22.04 LTS linux-gcp-6.2 6.2.0-1016.18~22.04.1 USN-6412-1
Ubuntu 22.04 LTS linux-gke +1 5.15.0-1044.49 USN-6416-1
Ubuntu 22.04 LTS linux-gkeop 5.15.0-1030.35 USN-6416-1
Ubuntu 22.04 LTS linux-hwe-6.2 6.2.0-34.34~22.04.1 USN-6412-1
Ubuntu 22.04 LTS linux-ibm +1 5.15.0-1040.43 USN-6416-3, USN-6416-1
Ubuntu 22.04 LTS linux-intel-iotg 5.15.0-1043.49 USN-6445-1
Ubuntu 22.04 LTS linux-lowlatency 5.15.0-86.95 USN-6416-1
Ubuntu 22.04 LTS linux-nvidia 5.15.0-1037.37 USN-6416-1
Ubuntu 22.04 LTS linux-nvidia-6.2 6.2.0-1011.11 USN-6466-1
Ubuntu 22.04 LTS linux-nvidia-tegra 5.15.0-1018.18 —
Ubuntu 22.04 LTS linux-nvidia-tegra-igx 5.15.0-1005.5 —
Ubuntu 22.04 LTS linux-oem-6.0 6.0.0-1021.21 USN-6385-1
Ubuntu 22.04 LTS linux-oem-6.1 6.1.0-1021.21 USN-6343-1
Ubuntu 22.04 LTS linux-oracle 5.15.0-1045.51 USN-6416-1
Ubuntu 22.04 LTS linux-riscv +11 No fix yet —
Ubuntu 22.04 LTS linux-xilinx-zynqmp 5.15.0-1025.29 —
Ubuntu 20.04 LTS linux-aws-5.15 5.15.0-1047.52~20.04.1 USN-6416-1
Ubuntu 20.04 LTS linux-azure-5.15 5.15.0-1049.56~20.04.1 USN-6416-1
Ubuntu 20.04 LTS linux-azure-fde-5.15 5.15.0-1049.56~20.04.1.1 USN-6416-1
Ubuntu 20.04 LTS linux-gcp-5.15 5.15.0-1044.52~20.04.1 USN-6416-1
Ubuntu 20.04 LTS linux-gke +25 No fix yet —
Ubuntu 20.04 LTS linux-gkeop-5.15 5.15.0-1030.35~20.04.1 USN-6416-1
Ubuntu 20.04 LTS linux-hwe-5.15 5.15.0-86.96~20.04.1 USN-6416-2
Ubuntu 20.04 LTS linux-ibm-5.15 5.15.0-1040.43~20.04.1 USN-6416-1
Ubuntu 20.04 LTS linux-intel-iotg-5.15 5.15.0-1043.49~20.04.1 USN-6445-2
Ubuntu 20.04 LTS linux-lowlatency-hwe-5.15 5.15.0-86.95~20.04.1 USN-6416-1
Ubuntu 20.04 LTS linux-nvidia-tegra-5.15 5.15.0-1018.18~20.04.1 —
Ubuntu 20.04 LTS linux-oracle-5.15 5.15.0-1045.51~20.04.1 USN-6416-2
Ubuntu 20.04 LTS linux-riscv-5.15 5.15.0-1043.47~20.04.1 —
Ubuntu 18.04 LTS linux-gcp +13 No fix yet —
Show 3 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
Ubuntu 16.04 LTS linux-hwe-edge No fix yet —
Ubuntu Pro Realtime 22.04 LTS linux-intel-iot-realtime 5.15.0-1040.42 —
Ubuntu Pro Realtime 22.04 LTS linux-realtime 5.15.0-1048.54 —
Ubuntu Pro FIPS-preview 22.04 LTS linux-fips No fix yet —
ReleasePackageFixed inAdvisory
RHEL 9 bpftool 7.2.0-362.8.1.el9_3 RHSA-2023:6583
RHEL 9 rv +64 5.14.0-362.8.1.el9_3 RHSA-2023:6583
ReleasePackageFixed inAdvisory
SLES 15 SP5 kernel-64kb +6 5.14.21-150500.55.28.1 SUSE-SU-2023:3971-1
SLES 15 SP5 kernel-azure +2 5.14.21-150500.33.17.1 SUSE-SU-2023:3656-1
SLES 15 SP5 kernel-default-base 5.14.21-150500.55.28.1.150500.6.11.2 SUSE-SU-2023:3971-1
SLES 15 SP4 kernel-64kb +6 5.14.21-150400.24.88.1 SUSE-SU-2023:3969-1
SLES 15 SP4 kernel-azure +2 5.14.21-150400.14.66.1 SUSE-SU-2023:3682-1
SLES 15 SP4 kernel-default-base 5.14.21-150400.24.88.1.150400.24.40.1 SUSE-SU-2023:3969-1
SLES 15 SP3 kernel-64kb +7 5.3.18-150300.59.133.1 SUSE-SU-2023:3684-1
SLES 15 SP3 kernel-default-base 5.3.18-150300.59.133.1.150300.18.78.1 SUSE-SU-2023:3684-1
SLES 15 SP2 kernel-default-base 5.3.18-150200.24.163.1.150200.9.81.1 SUSE-SU-2023:3687-1
SLES 15 SP2 kernel-docs +5 5.3.18-150200.24.163.1 SUSE-SU-2023:3687-1
Show 18 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
SLES for SAP 15 SP3 kernel-default-base 5.3.18-150300.59.133.1.150300.18.78.1 SUSE-SU-2023:3684-1
SLES for SAP 15 SP3 kernel-docs +5 5.3.18-150300.59.133.1 SUSE-SU-2023:3684-1
SLES for SAP 15 SP2 kernel-default-base 5.3.18-150200.24.163.1.150200.9.81.1 SUSE-SU-2023:3687-1
SLES for SAP 15 SP2 kernel-docs +5 5.3.18-150200.24.163.1 SUSE-SU-2023:3687-1
SLE Micro 5.5 kernel-default 5.14.21-150500.55.28.1 SUSE-SU-2023:3971-1
SLE Micro 5.5 kernel-default-base 5.14.21-150500.55.28.1.150500.6.11.2 SUSE-SU-2023:3971-1
SLE Micro 5.5 kernel-rt 5.14.21-150500.13.18.1 SUSE-SU-2023:3988-1
SLE Micro 5.4 kernel-default 5.14.21-150400.24.88.1 SUSE-SU-2023:3969-1
SLE Micro 5.4 kernel-default-base 5.14.21-150400.24.88.1.150400.24.40.1 SUSE-SU-2023:3969-1
SLE Micro 5.4 kernel-rt 5.14.21-150400.15.53.1 SUSE-SU-2023:3964-1
SLE Micro 5.3 kernel-default 5.14.21-150400.24.88.1 SUSE-SU-2023:3969-1
SLE Micro 5.3 kernel-default-base 5.14.21-150400.24.88.1.150400.24.40.1 SUSE-SU-2023:3969-1
SLE Micro 5.3 kernel-rt 5.14.21-150400.15.53.1 SUSE-SU-2023:3964-1
SLE Micro 5.2 kernel-default 5.3.18-150300.59.133.1 SUSE-SU-2023:3684-1
SLE Micro 5.2 kernel-default-base 5.3.18-150300.59.133.1.150300.18.78.1 SUSE-SU-2023:3684-1
SLE Micro 5.2 kernel-rt 5.3.18-150300.141.1 SUSE-SU-2023:3785-1
SLE Micro 5.1 kernel-default 5.3.18-150300.59.133.1 SUSE-SU-2023:3684-1
SLE Micro 5.1 kernel-default-base 5.3.18-150300.59.133.1.150300.18.78.1 SUSE-SU-2023:3684-1
SLE Micro 5.1 kernel-rt 5.3.18-150300.141.1 SUSE-SU-2023:3785-1
SLE Live Patching 15 SP5 kernel-default 5.14.21-150500.55.28.1 SUSE-SU-2023:3971-1
SLE Live Patching 15 SP5 kernel-livepatch-SLE15-SP5-RT_Update_4 +1 1-150500.11.3.1 SUSE-SU-2023:3988-1, SUSE-SU-2023:3599-2, SUSE-SU-2023:3599-1
SLE Live Patching 15 SP5 kernel-livepatch-SLE15-SP5_Update_0 +1 4-150500.9.2 SUSE-SU-2023:3928-1, SUSE-SU-2023:3772-1
SLE Live Patching 15 SP5 kernel-livepatch-SLE15-SP5_Update_1 +2 3-150500.2.1 SUSE-SU-2023:3924-1, SUSE-SU-2023:3923-1, SUSE-SU-2023:3784-1
SLE Live Patching 15 SP5 kernel-livepatch-SLE15-SP5_Update_3 +1 2-150500.2.1 SUSE-SU-2023:3929-1, SUSE-SU-2023:3806-1
SLE Live Patching 15 SP5 kernel-livepatch-SLE15-SP5_Update_5 1-150500.11.5.1 SUSE-SU-2023:3971-1
SLE Live Patching 15 SP4 kernel-default 5.14.21-150400.24.88.1 SUSE-SU-2023:3969-1
SLE Live Patching 15 SP4 kernel-livepatch-SLE15-SP4-RT_Update_1 10-150400.2.2 SUSE-SU-2023:3772-1
SLE Live Patching 15 SP4 kernel-livepatch-SLE15-SP4-RT_Update_12 +1 1-150400.1.3.1 SUSE-SU-2023:3964-1, SUSE-SU-2023:3600-2, SUSE-SU-2023:3600-1
SLE Live Patching 15 SP4 kernel-livepatch-SLE15-SP4-RT_Update_6 6-150400.2.1 SUSE-SU-2023:3783-1
SLE Live Patching 15 SP4 kernel-livepatch-SLE15-SP4_Update_13 4-150400.2.1 SUSE-SU-2023:3922-1
SLE Live Patching 15 SP4 kernel-livepatch-SLE15-SP4_Update_14 +3 3-150400.2.1 SUSE-SU-2023:3924-1, SUSE-SU-2023:3923-1, SUSE-SU-2023:3784-1
SLE Live Patching 15 SP4 kernel-livepatch-SLE15-SP4_Update_16 +1 2-150400.2.1 SUSE-SU-2023:3929-1, SUSE-SU-2023:3806-1
SLE Live Patching 15 SP4 kernel-livepatch-SLE15-SP4_Update_18 1-150400.9.3.1 SUSE-SU-2023:3969-1
SLE Live Patching 15 SP4 kernel-livepatch-SLE15-SP4_Update_3 14-150400.2.2 SUSE-SU-2023:3928-1
SLE Live Patching 15 SP3 kernel-default 5.3.18-150300.59.133.1 SUSE-SU-2023:3684-1
SLE Live Patching 15 SP3 kernel-livepatch-SLE15-SP3_Update_23 15-150300.2.2 SUSE-SU-2023:3892-1
SLE Live Patching 15 SP3 kernel-livepatch-SLE15-SP3_Update_30 7-150300.2.1 SUSE-SU-2023:3928-1
SLE Live Patching 15 SP3 kernel-livepatch-SLE15-SP3_Update_35 2-150300.2.1 SUSE-SU-2023:3912-1
SLE Live Patching 15 SP3 kernel-livepatch-SLE15-SP3_Update_36 1-150300.7.3.1 SUSE-SU-2023:3684-1
SLE Live Patching 15 SP2 kernel-default 5.3.18-150200.24.163.1 SUSE-SU-2023:3687-1
SLE Live Patching 15 SP2 kernel-livepatch-SLE15-SP2_Update_30 +1 12-150200.2.2 SUSE-SU-2023:3812-1, SUSE-SU-2023:3788-1
SLE Live Patching 15 SP2 kernel-livepatch-SLE15-SP2_Update_32 9-150200.2.2 SUSE-SU-2023:3893-1
SLE Live Patching 15 SP2 kernel-livepatch-SLE15-SP2_Update_33 8-150200.2.2 SUSE-SU-2023:3844-1
SLE Live Patching 15 SP2 kernel-livepatch-SLE15-SP2_Update_34 7-150200.2.1 SUSE-SU-2023:3846-1
SLE Live Patching 15 SP2 kernel-livepatch-SLE15-SP2_Update_37 4-150200.2.1 SUSE-SU-2023:3889-1
SLE Live Patching 15 SP2 kernel-livepatch-SLE15-SP2_Update_39 2-150200.2.1 SUSE-SU-2023:3891-1
SLE Live Patching 15 SP2 kernel-livepatch-SLE15-SP2_Update_40 1-150200.5.3.1 SUSE-SU-2023:3687-1
SLE HPC 15 SP3 kernel-64kb +6 5.3.18-150300.59.133.1 SUSE-SU-2023:3684-1
SLE HPC 15 SP3 kernel-default-base 5.3.18-150300.59.133.1.150300.18.78.1 SUSE-SU-2023:3684-1
SLE HPC 15 SP2 kernel-default-base 5.3.18-150200.24.163.1.150200.9.81.1 SUSE-SU-2023:3687-1
SLE HPC 15 SP2 kernel-docs +5 5.3.18-150200.24.163.1 SUSE-SU-2023:3687-1
SUSE Real Time Module 15 SP5 kernel-rt +3 5.14.21-150500.13.18.1 SUSE-SU-2023:3988-1
SUSE Real Time Module 15 SP4 kernel-rt +3 5.14.21-150400.15.53.1 SUSE-SU-2023:3964-1
SUSE Manager Server 4.2 kernel-default-base 5.3.18-150300.59.133.1.150300.18.78.1 SUSE-SU-2023:3684-1
SUSE Manager Server 4.2 kernel-source +3 5.3.18-150300.59.133.1 SUSE-SU-2023:3684-1
SUSE Manager Proxy 4.2 kernel-default-base 5.3.18-150300.59.133.1.150300.18.78.1 SUSE-SU-2023:3684-1
SUSE Manager Proxy 4.2 kernel-source +2 5.3.18-150300.59.133.1 SUSE-SU-2023:3684-1
SUSE Enterprise Storage 7.1 kernel-64kb +6 5.3.18-150300.59.133.1 SUSE-SU-2023:3684-1
SUSE Enterprise Storage 7.1 kernel-default-base 5.3.18-150300.59.133.1.150300.18.78.1 SUSE-SU-2023:3684-1
ReleasePackageFixed inAdvisory
openSUSE Leap 15.5 dtb-aarch64 +10 5.14.21-150500.55.28.1 SUSE-SU-2023:3971-1
openSUSE Leap 15.5 kernel-azure +2 5.14.21-150500.33.17.1 SUSE-SU-2023:3656-1
openSUSE Leap 15.5 kernel-default-base 5.14.21-150500.55.28.1.150500.6.11.2 SUSE-SU-2023:3971-1
openSUSE Leap 15.5 kernel-rt +3 5.14.21-150500.13.18.1 SUSE-SU-2023:3988-1
openSUSE Leap 15.4 dtb-aarch64 5.3.18-150300.59.133.1 SUSE-SU-2023:3969-1, SUSE-SU-2023:3684-1
openSUSE Leap 15.4 kernel-64kb +9 5.14.21-150400.24.88.1 SUSE-SU-2023:3969-1
openSUSE Leap 15.4 kernel-azure +2 5.14.21-150400.14.66.1 SUSE-SU-2023:3682-1
openSUSE Leap 15.4 kernel-default-base 5.14.21-150400.24.88.1.150400.24.40.1 SUSE-SU-2023:3969-1
openSUSE Leap 15.4 kernel-rt +3 5.14.21-150400.15.53.1 SUSE-SU-2023:3964-1

Amazon Linux

ReleasePackageFixed inAdvisory
Amazon Linux 2023 kernel-livepatch-6.1.49-69.116 1.0-0.amzn2023 ALAS2023-2023-330
Amazon Linux 2023 perf +12 6.1.49-69.116.amzn2023 ALAS2023-2023-330

Azure Linux

ReleasePackageFixed inAdvisory
Azure Linux 2 (CBL-Mariner) kernel 5.15.131.1-2 —

Oracle Linux

ReleasePackageFixed inAdvisory
Oracle Linux 9 bpftool 7.2.0-362.8.1.el9_3 ELSA-2023-6583
Oracle Linux 9 rv +25 5.14.0-362.8.1.el9_3 ELSA-2023-6583

Advisories 50

References