CVE-2023-3773: Kernel: xfrm: out-of-bounds read of xfrma_mtimer_thresh nlattr

Modified

AliasesUBUNTU-CVE-2023-3773DEBIAN-CVE-2023-3773CGA-234j-jfrq-fmvq+167 more

Published 25-07-2023Last modified 14-10-2026

Vulnerability summary

CVE-2023-3773 is a medium (CVSS 5.5) Out-of-bounds Read vulnerability in debian debian_linux. EPSS estimates a 0.25% chance of exploitation in the next 30 days, higher than 16.6% of scored vulnerabilities.

Priority

Routine

Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?

CVSS score

5.5/10

010

Medium · v3.1 (CVE.org)

EPSS score

0.25%

0%100%

Low · 0.00 pp in 30 days

KEVNot listedNot listed by any tracked catalog.

RansomwareNot flaggedNo ransomware use recorded.

Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 13 · Related 9

DLA-3623-1 DSA-5492-1 MGASA-2023-0328 MGASA-2023-0331 RHSA-2023:6583 USN-6415-1+8 more

Timeline

25-07-2023
PublishedVulnerability first disclosed.
14-10-2026
Last modifiedVulnerability information updated.

Description

A flaw was found in the Linux kernel’s IP framework for transforming packets (XFRM subsystem). This issue may allow a malicious user with CAP_NET_ADMIN privileges to cause a 4 byte out-of-bounds read of XFRMA_MTIMER_THRESH when parsing netlink attributes, leading to potential leakage of sensitive heap data to userspace.

CVSS metrics

6 scores · 5 sources · 2 versions

v4.04.8v3.15.5

EPSS trend

Probability

0.25%

Chance of exploitation in the next 30 days

Percentile

17%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.25% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs

CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

CWE-125Out-of-bounds ReadThe product reads data past the end, or before the beginning, of the intended buffer.

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu91 products

linux< 5.15.0-91.101
linux-allwinner-5.19All versions (No fix recorded)
linux-aws< 5.15.0-1051.56
linux-aws-5.0All versions (No fix recorded)
linux-aws-5.11All versions (No fix recorded)

linux-aws-5.13All versions (No fix recorded)
linux-aws-5.15< 5.15.0-1051.56~20.04.1
linux-aws-5.19All versions (No fix recorded)
linux-aws-5.3All versions (No fix recorded)
linux-aws-5.8All versions (No fix recorded)
linux-aws-6.2< 6.2.0-1017.17~22.04.1
linux-azureAll versions (No fix recorded) | < 5.15.0-1053.61
linux-azure-5.11All versions (No fix recorded)
linux-azure-5.13All versions (No fix recorded)
linux-azure-5.15< 5.15.0-1053.61~20.04.1
linux-azure-5.19All versions (No fix recorded)
linux-azure-5.3All versions (No fix recorded)
linux-azure-5.8All versions (No fix recorded)
linux-azure-6.2< 6.2.0-1018.18~22.04.1
linux-azure-edgeAll versions (No fix recorded)
linux-azure-fde< 5.15.0-1053.61.1
linux-azure-fde-5.19All versions (No fix recorded)
linux-azure-fde-6.2< 6.2.0-1018.18~22.04.1.1
linux-bluefield< 5.15.0-1033.35
linux-fipsAll versions (No fix recorded)
linux-gcpAll versions (No fix recorded) | < 5.15.0-1048.56
linux-gcp-5.11All versions (No fix recorded)
linux-gcp-5.13All versions (No fix recorded)
linux-gcp-5.15< 5.15.0-1048.56~20.04.1
linux-gcp-5.19All versions (No fix recorded)
linux-gcp-5.3All versions (No fix recorded)
linux-gcp-5.8All versions (No fix recorded)
linux-gcp-6.2All versions (No fix recorded)
linux-gkeAll versions (No fix recorded) | < 5.15.0-1048.53
linux-gke-4.15All versions (No fix recorded)
linux-gke-5.15All versions (No fix recorded)
linux-gke-5.4All versions (No fix recorded)
linux-gkeop< 5.15.0-1034.40
linux-gkeop-5.15< 5.15.0-1034.40~20.04.1
linux-gkeop-5.4All versions (No fix recorded)
linux-hweAll versions (No fix recorded)
linux-hwe-5.11All versions (No fix recorded)
linux-hwe-5.13All versions (No fix recorded)
linux-hwe-5.15< 5.15.0-91.101~20.04.1
linux-hwe-5.19All versions (No fix recorded)
linux-hwe-5.8All versions (No fix recorded)
linux-hwe-6.2< 6.2.0-39.40~22.04.1
linux-hwe-edgeAll versions (No fix recorded)
linux-ibm< 5.15.0-1044.47
linux-ibm-5.15< 5.15.0-1044.47~20.04.1
linux-intel-5.13All versions (No fix recorded)
linux-intel-iot-realtime< 5.15.0-1044.46
linux-intel-iotg< 5.15.0-1046.52
linux-intel-iotg-5.15< 5.15.0-1046.52~20.04.1
linux-kvm< 5.15.0-1048.53
linux-lowlatency< 5.15.0-91.101
linux-lowlatency-hwe-5.15< 5.15.0-91.101~20.04.1
linux-lowlatency-hwe-5.19All versions (No fix recorded)
linux-lowlatency-hwe-6.2< 6.2.0-1018.18~22.04.1
linux-nvidia< 5.15.0-1042.42
linux-nvidia-6.2< 6.2.0-1013.13
linux-nvidia-tegra< 5.15.0-1020.20
linux-nvidia-tegra-5.15< 5.15.0-1020.20~20.04.1
linux-nvidia-tegra-igx< 5.15.0-1007.7
linux-oemAll versions (No fix recorded)
linux-oem-5.10All versions (No fix recorded)
linux-oem-5.13All versions (No fix recorded)
linux-oem-5.14All versions (No fix recorded)
linux-oem-5.17All versions (No fix recorded)
linux-oem-5.6All versions (No fix recorded)
linux-oem-6.0All versions (No fix recorded)
linux-oem-6.1< 6.1.0-1023.23
linux-oracle< 5.15.0-1049.55
linux-oracle-5.0All versions (No fix recorded)
linux-oracle-5.11All versions (No fix recorded)
linux-oracle-5.13All versions (No fix recorded)
linux-oracle-5.15< 5.15.0-1049.55~20.04.1
linux-oracle-5.3All versions (No fix recorded)
linux-oracle-5.8All versions (No fix recorded)
linux-raspi< 5.15.0-1044.47
linux-raspi-realtimeAll versions (No fix recorded)
linux-raspi2All versions (No fix recorded)
linux-realtimeAll versions (No fix recorded) | < 5.15.0-1052.58
linux-riscvAll versions (No fix recorded)
linux-riscv-5.11All versions (No fix recorded)
linux-riscv-5.15< 5.15.0-1047.51~20.04.1
linux-riscv-5.19All versions (No fix recorded)
linux-riscv-5.8All versions (No fix recorded)
linux-starfive-5.19All versions (No fix recorded)
linux-starfive-6.2All versions (No fix recorded)
linux-xilinx-zynqmp< 5.15.0-1027.31

Show all 91

Chainguard82 products

hyperv-daemons-6.18All versions (No fix recorded)
hyperv-daemons-genericAll versions (No fix recorded)
linux-aws-6.12< 6.12.65-r0 | All versions (No fix recorded)
linux-aws-6.12-boot-installedAll versions (No fix recorded)
linux-aws-6.12-fips-boot-installedAll versions (No fix recorded)

linux-aws-6.12-headersAll versions (No fix recorded)
linux-aws-6.12-modulesAll versions (No fix recorded)
linux-aws-6.18< 6.18.10-r0 | All versions (No fix recorded)
linux-aws-6.18-boot-installedAll versions (No fix recorded)
linux-aws-6.18-fips-boot-installedAll versions (No fix recorded)
linux-aws-6.18-headersAll versions (No fix recorded)
linux-aws-6.18-modulesAll versions (No fix recorded)
linux-aws-genericAll versions (No fix recorded) | < 6.18.5-r0
linux-aws-generic-boot-installedAll versions (No fix recorded)
linux-aws-generic-fips-boot-installedAll versions (No fix recorded)
linux-aws-generic-headersAll versions (No fix recorded)
linux-aws-generic-modulesAll versions (No fix recorded)
linux-azure-6.12All versions (No fix recorded) | < 6.12.65-r1
linux-azure-6.18All versions (No fix recorded)
linux-azure-6.18-boot-installedAll versions (No fix recorded)
linux-azure-6.18-fips-boot-installedAll versions (No fix recorded)
linux-azure-6.18-headersAll versions (No fix recorded)
linux-azure-6.18-modulesAll versions (No fix recorded)
linux-azure-genericAll versions (No fix recorded) | < 6.18.5-r0
linux-azure-generic-boot-installedAll versions (No fix recorded)
linux-azure-generic-fips-boot-installedAll versions (No fix recorded)
linux-azure-generic-headersAll versions (No fix recorded)
linux-azure-generic-modulesAll versions (No fix recorded)
linux-desktop-6.18All versions (No fix recorded)
linux-desktop-6.18-bootcAll versions (No fix recorded)
linux-desktop-6.18-bootc-boot-installedAll versions (No fix recorded)
linux-desktop-6.18-headersAll versions (No fix recorded)
linux-desktop-6.18-modulesAll versions (No fix recorded)
linux-desktop-7.2All versions (No fix recorded)
linux-desktop-7.2-bootcAll versions (No fix recorded)
linux-desktop-7.2-bootc-boot-installedAll versions (No fix recorded)
linux-desktop-7.2-headersAll versions (No fix recorded)
linux-desktop-7.2-modulesAll versions (No fix recorded)
linux-firecracker-6.18All versions (No fix recorded)
linux-gcp-6.12All versions (No fix recorded) | < 6.12.65-r0
linux-gcp-6.18All versions (No fix recorded) | < 6.18.10-r0
linux-gcp-6.18-boot-installedAll versions (No fix recorded)
linux-gcp-6.18-fips-boot-installedAll versions (No fix recorded)
linux-gcp-6.18-headersAll versions (No fix recorded)
linux-gcp-6.18-modulesAll versions (No fix recorded)
linux-gcp-genericAll versions (No fix recorded) | < 6.18.5-r0
linux-gcp-generic-boot-installedAll versions (No fix recorded)
linux-gcp-generic-fips-boot-installedAll versions (No fix recorded)
linux-gcp-generic-headersAll versions (No fix recorded)
linux-gcp-generic-modulesAll versions (No fix recorded)
linux-microvm-6.18All versions (No fix recorded)
linux-microvm-6.18-image-compressedAll versions (No fix recorded)
linux-microvm-6.18-image-uncompressedAll versions (No fix recorded)
linux-microvm-6.18-loadpin-testAll versions (No fix recorded)
linux-microvm-6.18-modulesAll versions (No fix recorded)
linux-microvm-7.3All versions (No fix recorded)
linux-microvm-7.3-image-uncompressedAll versions (No fix recorded)
linux-microvm-7.3-modulesAll versions (No fix recorded)
linux-qemu-6.12< 6.12.71-r0
linux-qemu-6.18< 6.18.10-r0
linux-qemu-generic< 6.18.5-r0 | All versions (No fix recorded)
linux-qemu-generic-bootc-boot-installed< 6.18.5-r0
linux-qemu-melange< 6.18.16-r0
linux-qemu-rc< 6.19_rc2-r0 | < 6.19_rc1-r1 | < 6.18_rc7-r3 | < 6.19_rc1-r2 | < 6.18_rc7-r2 | < 6.18_rc6-r0 | < 6.19_rc3-r0 | < 6.19_rc1-r0 | < 6.18_rc5-r1 | < 6.19_rc4-r0 | < 6.19_rc5-r0 | < 6.18_rc5-r0 | All versions (No fix recorded)
linux-qemu-rc-boot-installedAll versions (No fix recorded)
linux-qemu-rc-fips-boot-installedAll versions (No fix recorded)
linux-qemu-rc-headersAll versions (No fix recorded)
linux-qemu-rc-modulesAll versions (No fix recorded)
linux-raspberry-piAll versions (No fix recorded)
linux-raspberry-pi-4All versions (No fix recorded)
linux-raspberry-pi-4-boot-configurationAll versions (No fix recorded)
linux-raspberry-pi-4-bootcAll versions (No fix recorded)
linux-raspberry-pi-boot-configurationAll versions (No fix recorded)
linux-raspberry-pi-bootcAll versions (No fix recorded)
linux-server-7.2All versions (No fix recorded)
linux-server-7.2-bootcAll versions (No fix recorded)
linux-server-7.2-bootc-boot-installedAll versions (No fix recorded)
linux-server-7.2-headersAll versions (No fix recorded)
linux-server-7.2-modulesAll versions (No fix recorded)
linux-vmware-6.12< 6.12.71-r0
linux-vmware-6.18< 6.18.10-r0
linux-vmware-generic< 6.18.5-r0 | All versions (No fix recorded)