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01 Record

CVE-2023-1838

A use-after-free flaw was found in vhost_net_set_backend in drivers/vhost/net.c in virtio network subcomponent in the Linux kernel due to a double fget. This flaw could allow a local attacker to crash

UnratedPUBLISHEDCNA: redhat
CNA base scoreUnratedNo CNA CVSS vector
View raw JSON

02 Description

A use-after-free flaw was found in vhost_net_set_backend in drivers/vhost/net.c in virtio network subcomponent in the Linux kernel due to a double fget. This flaw could allow a local attacker to crash

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
  • Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.25% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 16.3% of scored records. A rank, not a probability.
NVD base score
7.1 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
NVD analysis status
Modified. NVD last modified this record on 2026-10-08.
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
2023-04-05 00:00Z3 YR AGO
Last updated
2026-10-08 21:13Z20 DAYS AGO
Reserved
2023-04-04
Assigning CNA
redhat
Record state
PUBLISHED
Severity
Not rated by the issuing CNA
CNA CVSS vector
Not published by the issuing CNA
Weaknesses
Data version
5.2
Document digest
10e8b8a6591f1b6db559ff4af89537418b078efccc90de4776d6bf8fef4c9997

05 Affected products

VendorProductVersionsPlatforms
n/aKernelLinux Kernel prior to kernel 5.18 25—

06 References

07 Fixed in

AlmaLinux 8

  • bpftool
    Fixed in 4.18.0-513.18.1.el8_9
  • kernel
    Fixed in 4.18.0-513.18.1.el8_9
  • kernel-abi-stablelists
    Fixed in 4.18.0-513.18.1.el8_9
  • kernel-core
    Fixed in 4.18.0-513.18.1.el8_9
  • kernel-cross-headers
    Fixed in 4.18.0-513.18.1.el8_9
  • kernel-debug
    Fixed in 4.18.0-513.18.1.el8_9
  • kernel-debug-core
    Fixed in 4.18.0-513.18.1.el8_9
  • kernel-debug-devel
    Fixed in 4.18.0-513.18.1.el8_9
  • kernel-debug-modules
    Fixed in 4.18.0-513.18.1.el8_9
  • kernel-debug-modules-extra
    Fixed in 4.18.0-513.18.1.el8_9
  • kernel-devel
    Fixed in 4.18.0-513.18.1.el8_9
  • kernel-doc
    Fixed in 4.18.0-513.18.1.el8_9
  • kernel-modules
    Fixed in 4.18.0-513.18.1.el8_9
  • kernel-modules-extra
    Fixed in 4.18.0-513.18.1.el8_9
  • kernel-tools
    Fixed in 4.18.0-513.18.1.el8_9
  • kernel-tools-libs
    Fixed in 4.18.0-513.18.1.el8_9
  • kernel-tools-libs-devel
    Fixed in 4.18.0-513.18.1.el8_9
  • kernel-zfcpdump
    Fixed in 4.18.0-513.18.1.el8_9
  • kernel-zfcpdump-core
    Fixed in 4.18.0-513.18.1.el8_9
  • kernel-zfcpdump-devel
    Fixed in 4.18.0-513.18.1.el8_9
  • kernel-zfcpdump-modules
    Fixed in 4.18.0-513.18.1.el8_9
  • kernel-zfcpdump-modules-extra
    Fixed in 4.18.0-513.18.1.el8_9
  • perf
    Fixed in 4.18.0-513.18.1.el8_9
  • python3-perf
    Fixed in 4.18.0-513.18.1.el8_9

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 4.18.0-513.18.1.el8_9
  • kernel
    Fixed in 4.18.0-513.18.1.el8_9
  • kernel-abi-stablelists
    Fixed in 4.18.0-513.18.1.el8_9
  • kernel-core
    Fixed in 4.18.0-513.18.1.el8_9
  • kernel-cross-headers
    Fixed in 4.18.0-513.18.1.el8_9
  • kernel-debug
    Fixed in 4.18.0-513.18.1.el8_9
  • kernel-debug-core
    Fixed in 4.18.0-513.18.1.el8_9
  • kernel-debug-devel
    Fixed in 4.18.0-513.18.1.el8_9
  • kernel-debug-modules
    Fixed in 4.18.0-513.18.1.el8_9
  • kernel-debug-modules-extra
    Fixed in 4.18.0-513.18.1.el8_9
  • kernel-devel
    Fixed in 4.18.0-513.18.1.el8_9
  • kernel-doc
    Fixed in 4.18.0-513.18.1.el8_9
  • kernel-modules
    Fixed in 4.18.0-513.18.1.el8_9
  • kernel-modules-extra
    Fixed in 4.18.0-513.18.1.el8_9
  • kernel-tools
    Fixed in 4.18.0-513.18.1.el8_9
  • kernel-tools-libs
    Fixed in 4.18.0-513.18.1.el8_9
  • kernel-tools-libs-devel
    Fixed in 4.18.0-513.18.1.el8_9
  • kernel-zfcpdump
    Fixed in 4.18.0-513.18.1.el8_9
  • kernel-zfcpdump-core
    Fixed in 4.18.0-513.18.1.el8_9
  • kernel-zfcpdump-devel
    Fixed in 4.18.0-513.18.1.el8_9
  • kernel-zfcpdump-modules
    Fixed in 4.18.0-513.18.1.el8_9
  • kernel-zfcpdump-modules-extra
    Fixed in 4.18.0-513.18.1.el8_9
  • perf
    Fixed in 4.18.0-513.18.1.el8_9
  • python3-perf
    Fixed in 4.18.0-513.18.1.el8_9

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 5.17.11-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

  • linux
    Fixed in 5.17.11-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

  • linux
    Fixed in 5.17.11-1

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-aws-5.4
    Fixed in 5.4.0-1085.92~18.04.1
  • linux-azure
    No fix yet
  • linux-azure-5.3
    No fix yet
  • linux-azure-5.4
    Fixed in 5.4.0-1091.96~18.04.1
  • linux-azure-edge
    No fix yet
  • linux-gcp
    No fix yet
  • linux-gcp-5.3
    No fix yet
  • linux-gcp-5.4
    Fixed in 5.4.0-1089.97~18.04.1
  • 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-5.4
    Fixed in 5.4.0-126.142~18.04.1
  • linux-hwe-edge
    No fix yet
  • linux-ibm-5.4
    Fixed in 5.4.0-1033.37~18.04.1
  • linux-oem
    No fix yet
  • linux-oracle-5.0
    No fix yet
  • linux-oracle-5.3
    No fix yet
  • linux-oracle-5.4
    Fixed in 5.4.0-1083.91~18.04.1
  • linux-raspi-5.4
    Fixed in 5.4.0-1070.80~18.04.1

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 20.04 LTS

  • linux
    Fixed in 5.4.0-126.142
  • linux-aws
    Fixed in 5.4.0-1085.92
  • linux-aws-5.11
    No fix yet
  • linux-aws-5.13
    No fix yet
  • linux-aws-5.15
    Fixed in 5.15.0-1019.23~20.04.1
  • linux-aws-5.8
    No fix yet
  • linux-azure
    Fixed in 5.4.0-1091.96
  • linux-azure-5.11
    No fix yet
  • linux-azure-5.13
    No fix yet
  • linux-azure-5.15
    Fixed in 5.15.0-1019.24~20.04.1
  • linux-azure-5.8
    No fix yet
  • linux-bluefield
    Fixed in 5.4.0-1046.51
  • linux-gcp
    Fixed in 5.4.0-1089.97
  • linux-gcp-5.11
    No fix yet
  • linux-gcp-5.13
    No fix yet
  • linux-gcp-5.15
    Fixed in 5.15.0-1017.23~20.04.2
  • linux-gcp-5.8
    No fix yet
  • linux-gke
    Fixed in 5.4.0-1083.89
  • linux-gke-5.15
    Fixed in 5.15.0-1015.18~20.04.1
  • linux-gkeop
    Fixed in 5.4.0-1053.56
  • linux-hwe-5.11
    No fix yet
  • linux-hwe-5.13
    No fix yet
  • linux-hwe-5.15
    Fixed in 5.15.0-48.54~20.04.1
  • linux-hwe-5.8
    No fix yet
  • linux-ibm
    Fixed in 5.4.0-1033.37
  • linux-intel-5.13
    No fix yet
  • linux-intel-iotg-5.15
    Fixed in 5.15.0-1015.20~20.04.2
  • linux-iot
    Fixed in 5.4.0-1004.6
  • linux-kvm
    Fixed in 5.4.0-1075.80
  • linux-lowlatency-hwe-5.15
    Fixed in 5.15.0-48.54~20.04.1
  • 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
    Fixed in 5.4.0-1083.91
  • linux-oracle-5.11
    No fix yet
  • linux-oracle-5.13
    No fix yet
  • linux-oracle-5.15
    Fixed in 5.15.0-1017.22~20.04.1
  • linux-oracle-5.8
    No fix yet
  • linux-raspi
    Fixed in 5.4.0-1070.80

5 further packages in Ubuntu 20.04 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 22.04 LTS

  • linux
    Fixed in 5.15.0-47.51
  • linux-aws
    Fixed in 5.15.0-1019.23
  • linux-azure
    Fixed in 5.15.0-1019.24
  • linux-gcp
    Fixed in 5.15.0-1017.23
  • linux-gke
    Fixed in 5.15.0-1015.18
  • linux-gkeop
    Fixed in 5.15.0-1002.4
  • linux-ibm
    Fixed in 5.15.0-1013.15
  • linux-intel-iot-realtime
    No fix yet
  • linux-intel-iotg
    Fixed in 5.15.0-1015.20
  • linux-kvm
    Fixed in 5.15.0-1017.21
  • linux-lowlatency
    Fixed in 5.15.0-47.53
  • linux-nvidia
    Fixed in 5.15.0-1007.7
  • linux-oem-5.17
    Fixed in 5.17.0-1013.14
  • linux-oracle
    Fixed in 5.15.0-1017.22
  • linux-raspi
    Fixed in 5.15.0-1014.16
  • linux-realtime
    No fix yet
  • linux-riscv
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 24.04 LTS

  • linux-raspi-realtime
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 14.04 LTS

  • linux-azure
    Fixed in 4.15.0-1176.191~14.04.1
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 16.04 LTS

  • linux-aws-hwe
    Fixed in 4.15.0-1167.180~16.04.1
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
  • linux-azure
    Fixed in 4.15.0-1176.191~16.04.1
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
  • linux-gcp
    Fixed in 4.15.0-1161.178~16.04.1
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
  • linux-hwe
    Fixed in 4.15.0-224.236~16.04.1
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
  • linux-oracle
    Fixed in 4.15.0-1130.141~16.04.1
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro

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
    Fixed in 4.15.0-224.236
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
  • linux-aws
    Fixed in 4.15.0-1167.180
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
  • linux-azure-4.15
    Fixed in 4.15.0-1176.191
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
  • linux-gcp-4.15
    Fixed in 4.15.0-1161.178
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
  • linux-kvm
    Fixed in 4.15.0-1151.156
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
  • linux-oracle
    Fixed in 4.15.0-1130.141
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro FIPS-updates 18.04 LTS

  • linux-aws-fips
    Fixed in 4.15.0-2106.112
    Available with Ubuntu Pro: https://ubuntu.com/pro
  • linux-azure-fips
    Fixed in 4.15.0-2085.91
    Available with Ubuntu Pro: https://ubuntu.com/pro
  • linux-fips
    Fixed in 4.15.0-1122.133
    Available with Ubuntu Pro: https://ubuntu.com/pro
  • linux-gcp-fips
    Fixed in 4.15.0-2069.74
    Available with Ubuntu Pro: https://ubuntu.com/pro

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
    Fixed in 5.4.0-1085.92+fips1
    Available with Ubuntu Pro: https://ubuntu.com/pro
  • linux-azure-fips
    Fixed in 5.4.0-1091.96+fips1
    Available with Ubuntu Pro: https://ubuntu.com/pro
  • linux-fips
    Fixed in 5.4.0-1061.69
    Available with Ubuntu Pro: https://ubuntu.com/pro
  • linux-gcp-fips
    Fixed in 5.4.0-1089.97+fips1
    Available with Ubuntu Pro: https://ubuntu.com/pro

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro FIPS 18.04 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 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-realtime
    Fixed in 5.15.0-1020.20
    Available with Ubuntu Pro: https://ubuntu.com/pro

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.