CVE-2023-53751
cifs: fix potential use-after-free bugs in TCP_Server_Info::hostname
02 Description
cifs: fix potential use-after-free bugs in TCP_Server_Info::hostname
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 0.41% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 35.4% of scored records. A rank, not a probability.
- NVD base score
- 9.8 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- NVD analysis status
- Deferred. NVD last modified this record on 2026-08-04.
- Red Hat severity
- Moderate. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2025-12-08 01:19Z10 MO AGO
- Last updated
- 2026-08-05 09:15Z2 MO AGO
- Reserved
- 2025-12-08
- Assigning CNA
- Linux
- Record state
- PUBLISHED
- Severity
- Critical (CVSS 9.8)
- CNA CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weaknesses
- CWE-825Expired Pointer DereferenceBase
- Data version
- 5.2
- Document digest
- 4aa7eb6d3683ca162ad069f423f949ddb8730336c1b518b43553d40276de5509
05 Affected products
06 References
- git.kernel.orghttps://git.kernel.org/stable/c/64d62ac6d6514cba1305bd08e271ec1843bdd612
- git.kernel.orghttps://git.kernel.org/stable/c/c511954bf142fe1995aec3c739a9f1a76990283a
- git.kernel.orghttps://git.kernel.org/stable/c/0b08c4c499200be67d54c439d56e5ea866869945
- git.kernel.orghttps://git.kernel.org/stable/c/90c49fce1c43e1cc152695e20363ff5087897c09
07 Fixed in
AlmaLinux 8
- bpftool Fixed in 4.18.0-553.82.1.el8_10
- kernel Fixed in 4.18.0-553.82.1.el8_10
- kernel-abi-stablelists Fixed in 4.18.0-553.82.1.el8_10
- kernel-core Fixed in 4.18.0-553.82.1.el8_10
- kernel-cross-headers Fixed in 4.18.0-553.82.1.el8_10
- kernel-debug Fixed in 4.18.0-553.82.1.el8_10
- kernel-debug-core Fixed in 4.18.0-553.82.1.el8_10
- kernel-debug-devel Fixed in 4.18.0-553.82.1.el8_10
- kernel-debug-modules Fixed in 4.18.0-553.82.1.el8_10
- kernel-debug-modules-extra Fixed in 4.18.0-553.82.1.el8_10
- kernel-devel Fixed in 4.18.0-553.82.1.el8_10
- kernel-doc Fixed in 4.18.0-553.82.1.el8_10
- kernel-headers Fixed in 4.18.0-553.82.1.el8_10
- kernel-modules Fixed in 4.18.0-553.82.1.el8_10
- kernel-modules-extra Fixed in 4.18.0-553.82.1.el8_10
- kernel-tools Fixed in 4.18.0-553.82.1.el8_10
- kernel-tools-libs Fixed in 4.18.0-553.82.1.el8_10
- kernel-tools-libs-devel Fixed in 4.18.0-553.82.1.el8_10
- kernel-zfcpdump Fixed in 4.18.0-553.82.1.el8_10
- kernel-zfcpdump-core Fixed in 4.18.0-553.82.1.el8_10
- kernel-zfcpdump-devel Fixed in 4.18.0-553.82.1.el8_10
- kernel-zfcpdump-modules Fixed in 4.18.0-553.82.1.el8_10
- kernel-zfcpdump-modules-extra Fixed in 4.18.0-553.82.1.el8_10
- perf Fixed in 4.18.0-553.82.1.el8_10
- python3-perf Fixed in 4.18.0-553.82.1.el8_10
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 8
- bpftool Fixed in 4.18.0-553.82.1.el8_10
- kernel Fixed in 4.18.0-553.82.1.el8_10
- kernel-abi-stablelists Fixed in 4.18.0-553.82.1.el8_10
- kernel-core Fixed in 4.18.0-553.82.1.el8_10
- kernel-cross-headers Fixed in 4.18.0-553.82.1.el8_10
- kernel-debug Fixed in 4.18.0-553.82.1.el8_10
- kernel-debug-core Fixed in 4.18.0-553.82.1.el8_10
- kernel-debug-devel Fixed in 4.18.0-553.82.1.el8_10
- kernel-debug-modules Fixed in 4.18.0-553.82.1.el8_10
- kernel-debug-modules-extra Fixed in 4.18.0-553.82.1.el8_10
- kernel-devel Fixed in 4.18.0-553.82.1.el8_10
- kernel-doc Fixed in 4.18.0-553.82.1.el8_10
- kernel-headers Fixed in 4.18.0-553.82.1.el8_10
- kernel-modules Fixed in 4.18.0-553.82.1.el8_10
- kernel-modules-extra Fixed in 4.18.0-553.82.1.el8_10
- kernel-tools Fixed in 4.18.0-553.82.1.el8_10
- kernel-tools-libs Fixed in 4.18.0-553.82.1.el8_10
- kernel-tools-libs-devel Fixed in 4.18.0-553.82.1.el8_10
- kernel-zfcpdump Fixed in 4.18.0-553.82.1.el8_10
- kernel-zfcpdump-core Fixed in 4.18.0-553.82.1.el8_10
- kernel-zfcpdump-devel Fixed in 4.18.0-553.82.1.el8_10
- kernel-zfcpdump-modules Fixed in 4.18.0-553.82.1.el8_10
- kernel-zfcpdump-modules-extra Fixed in 4.18.0-553.82.1.el8_10
- perf Fixed in 4.18.0-553.82.1.el8_10
- python3-perf Fixed in 4.18.0-553.82.1.el8_10
Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
Debian 12
- linux Fixed in 6.1.37-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- linux Fixed in 6.3.7-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- linux Fixed in 6.3.7-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 16.04 LTS
- linux-hwe-edge No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 18.04 LTS
- linux-aws-5.0 No fix yet
- linux-aws-5.3 No fix yet
- linux-azure No fix yet
- linux-azure-5.3 No fix yet
- linux-azure-edge No fix yet
- linux-gcp No fix yet
- linux-gcp-5.3 No fix yet
- linux-gke-4.15 No fix yet
- linux-gke-5.4 No fix yet
- linux-gkeop-5.4 No fix yet
- linux-hwe No fix yet
- linux-hwe-edge No fix yet
- linux-oem No fix yet
- linux-oracle-5.0 No fix yet
- linux-oracle-5.3 No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 20.04 LTS
- linux-aws-5.11 No fix yet
- linux-aws-5.13 No fix yet
- linux-aws-5.8 No fix yet
- linux-azure-5.11 No fix yet
- linux-azure-5.13 No fix yet
- linux-azure-5.15 Fixed in 5.15.0-1051.59~20.04.1
- linux-azure-5.8 No fix yet
- linux-azure-fde No fix yet
- linux-gcp-5.11 No fix yet
- linux-gcp-5.13 No fix yet
- linux-gcp-5.8 No fix yet
- linux-gke No fix yet
- linux-gke-5.15 No fix yet
- linux-gkeop No fix yet
- linux-gkeop-5.15 No fix yet
- linux-hwe-5.11 No fix yet
- linux-hwe-5.13 No fix yet
- linux-hwe-5.8 No fix yet
- linux-intel-5.13 No fix yet
- linux-oem-5.10 No fix yet
- linux-oem-5.13 No fix yet
- linux-oem-5.14 No fix yet
- linux-oem-5.6 No fix yet
- linux-oracle-5.11 No fix yet
- linux-oracle-5.13 No fix yet
- linux-oracle-5.8 No fix yet
- linux-raspi2 No fix yet
- linux-riscv No fix yet
- linux-riscv-5.11 No fix yet
- linux-riscv-5.8 No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 22.04 LTS
- linux No fix yet
- linux-allwinner-5.19 No fix yet
- linux-aws No fix yet
- linux-aws-5.19 No fix yet
- linux-aws-6.2 No fix yet
- linux-aws-6.5 No fix yet
- linux-azure Fixed in 5.15.0-1051.59
- linux-azure-5.19 No fix yet
- linux-azure-6.2 No fix yet
- linux-azure-6.5 No fix yet
- linux-azure-fde Fixed in 5.15.0-1051.59.1
- linux-azure-fde-5.19 No fix yet
- linux-azure-fde-6.2 No fix yet
- linux-gcp No fix yet
- linux-gcp-5.19 No fix yet
- linux-gcp-6.2 No fix yet
- linux-gcp-6.5 No fix yet
- linux-gke No fix yet
- linux-gkeop No fix yet
- linux-hwe-5.19 No fix yet
- linux-hwe-6.2 No fix yet
- linux-hwe-6.5 No fix yet
- linux-ibm No fix yet
- linux-intel-iot-realtime No fix yet
- linux-intel-iotg No fix yet
- linux-kvm No fix yet
- linux-lowlatency No fix yet
- linux-lowlatency-hwe-5.19 No fix yet
- linux-lowlatency-hwe-6.2 No fix yet
- linux-lowlatency-hwe-6.5 No fix yet
- linux-nvidia No fix yet
- linux-nvidia-6.2 No fix yet
- linux-nvidia-6.5 No fix yet
- linux-nvidia-tegra No fix yet
- linux-nvidia-tegra-igx No fix yet
- linux-oem-5.17 No fix yet
- linux-oem-6.0 No fix yet
- linux-oem-6.1 No fix yet
- linux-oem-6.5 No fix yet
- linux-oracle No fix yet
10 further packages in Ubuntu 22.04 LTS not shown (first 40 listed).
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 24.04 LTS
- linux-azure-6.11 No fix yet
- linux-gcp-6.11 No fix yet
- linux-hwe-6.11 No fix yet
- linux-lowlatency-hwe-6.11 No fix yet
- linux-nvidia-6.11 No fix yet
- linux-oem-6.11 No fix yet
- linux-oem-6.8 No fix yet
- linux-raspi-realtime No fix yet
- linux-realtime No fix yet
- linux-riscv No fix yet
- linux-riscv-6.14 No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Nvidia-BlueField 22.04 LTS
- linux-bluefield No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 18.04 LTS
- linux-aws-5.4 No fix yet
- linux-azure-5.4 No fix yet
- linux-gcp-5.4 No fix yet
- linux-hwe-5.4 No fix yet
- linux-ibm-5.4 No fix yet
- linux-oracle-5.4 No fix yet
- linux-raspi-5.4 No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 20.04 LTS
- linux No fix yet
- linux-aws No fix yet
- linux-aws-5.15 No fix yet
- linux-azure No fix yet
- linux-bluefield No fix yet
- linux-gcp No fix yet
- linux-gcp-5.15 No fix yet
- linux-hwe-5.15 No fix yet
- linux-ibm No fix yet
- linux-ibm-5.15 No fix yet
- linux-intel-iotg-5.15 No fix yet
- linux-iot No fix yet
- linux-kvm No fix yet
- linux-lowlatency-hwe-5.15 No fix yet
- linux-nvidia-tegra-5.15 No fix yet
- linux-oracle No fix yet
- linux-oracle-5.15 No fix yet
- linux-raspi No fix yet
- linux-riscv-5.15 No fix yet
- linux-xilinx-zynqmp No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro FIPS-preview 22.04 LTS
- linux-aws-fips No fix yet
- linux-fips No fix yet
- linux-gcp-fips No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro FIPS-updates 20.04 LTS
- linux-aws-fips No fix yet
- linux-azure-fips No fix yet
- linux-fips No fix yet
- linux-gcp-fips No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro FIPS-updates 22.04 LTS
- linux-aws-fips No fix yet
- linux-fips No fix yet
- linux-gcp-fips No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro FIPS 20.04 LTS
- linux-aws-fips No fix yet
- linux-azure-fips No fix yet
- linux-fips No fix yet
- linux-gcp-fips No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro Realtime 22.04 LTS
- linux-intel-iot-realtime No fix yet
- linux-realtime No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.