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Vulnerability · Published Mar 27, 2025 · Assigned by Linux

CVE-2023-52996ipv4: prevent potential spectre v1 gadget in fib_metrics_match()

Medium 5.5

In plain English

A medium-severity security flaw in Linux from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 19% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)5.5Medium
Exploit odds (30 days)0.3%top 80.9% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

In the Linux kernel, the following vulnerability has been resolved: ipv4: prevent potential spectre v1 gadget in fib_metrics_match() if (!type) continue; if (type > RTAX_MAX) return false; ... fi_val = fi->fib_metrics->metrics[type - 1]; @type being used as an array index, we need to prevent cpu speculation or risk leaking kernel memory content.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux6.1.11-1DEBIAN-CVE-2023-52996
Debian:13linux6.1.11-1DEBIAN-CVE-2023-52996
Debian:14linux6.1.11-1DEBIAN-CVE-2023-52996
Ubuntu:22.04:LTSlinux5.15.0-70.77UBUNTU-CVE-2023-52996
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2023-52996
Ubuntu:22.04:LTSlinux-aws5.15.0-1034.38UBUNTU-CVE-2023-52996
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2023-52996
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2023-52996
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2023-52996
Ubuntu:22.04:LTSlinux-azure5.15.0-1036.43UBUNTU-CVE-2023-52996
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2023-52996
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2023-52996
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2023-52996
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1036.43.1UBUNTU-CVE-2023-52996
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2023-52996
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2023-52996
Ubuntu:22.04:LTSlinux-gcp5.15.0-1032.40UBUNTU-CVE-2023-52996
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2023-52996
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2023-52996
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2023-52996
Ubuntu:22.04:LTSlinux-gke5.15.0-1031.36UBUNTU-CVE-2023-52996
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1018.23UBUNTU-CVE-2023-52996
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2023-52996
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2023-52996
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2023-52996
Ubuntu:22.04:LTSlinux-ibm5.15.0-1028.31UBUNTU-CVE-2023-52996
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1028.33UBUNTU-CVE-2023-52996
Ubuntu:22.04:LTSlinux-kvm5.15.0-1031.36UBUNTU-CVE-2023-52996
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-70.77UBUNTU-CVE-2023-52996
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2023-52996
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2023-52996
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2023-52996
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1023.23UBUNTU-CVE-2023-52996
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2023-52996
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2023-52996
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2023-52996
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2023-52996
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2023-52996
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2023-52996
Ubuntu:22.04:LTSlinux-oracle5.15.0-1033.39UBUNTU-CVE-2023-52996
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2023-52996
Ubuntu:22.04:LTSlinux-raspi5.15.0-1027.29UBUNTU-CVE-2023-52996
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2023-52996
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2023-52996
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2023-52996
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2023-52996
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2023-52996
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2023-52996
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2023-52996
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2023-52996
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2023-52996

Affected products (as reported)

VendorProductVersions
Linux Linux 5f9ae3d9e7e4ad6db0491abc7c4ae5452dbeadd8 – before 8f0eb24f1a7a60ce635f0d757a46f1a37a4d467d5f9ae3d9e7e4ad6db0491abc7c4ae5452dbeadd8 – before 7f9828fb1f688210e681268490576f0ca65c322a5f9ae3d9e7e4ad6db0491abc7c4ae5452dbeadd8 – before ca3cf947760de050d558293002ad3e7f4b8745d25f9ae3d9e7e4ad6db0491abc7c4ae5452dbeadd8 – before f9753ebd61be2d957b5504cbd3fd719674f05b7a5f9ae3d9e7e4ad6db0491abc7c4ae5452dbeadd8 – before 5e9398a26a92fc402d82ce1f97cc67d832527da0
Linux Linux 4.14

References