CVE-2023-52996

ipv4: prevent potential spectre v1 gadget in fib_metrics_match()

MEDIUM

5.5

CVSS Score

Published: March 27, 2025 at 04:43 PM UTC

Updated: June 17, 2026 at 06:44 AM UTC

1 product affected across 1 vendorLinux Kernel

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Severity

MEDIUM5.5

Exploit prediction

EPSS 0.3%

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel · Linux

95%

4.14 ≤ v < 5.10.1664.14 ≤ v < 5.15.914.14 ≤ v < 5.4.2314.14 ≤ v < 6.1.94.14 ≤ v < 6.25.11 ≤ v < 5.15.915.16 ≤ v < 6.1.95.5 ≤ v < 5.10.1664.145f9ae3d9e7e4ad6db0491abc7c4ae5452dbeadd86.2 rc1 6.2 rc2 6.2 rc3 6.2 rc4 6.2 rc5

Vendor states this is fixed in 5e9398a26a92fc402d82ce1f97cc67d832527da0 (fixed)

Vendor states this is fixed in 7f9828fb1f688210e681268490576f0ca65c322a (fixed)

Vendor states this is fixed in 8f0eb24f1a7a60ce635f0d757a46f1a37a4d467d (fixed)

Vendor states this is fixed in ca3cf947760de050d558293002ad3e7f4b8745d2 (fixed)

Vendor states this is fixed in f9753ebd61be2d957b5504cbd3fd719674f05b7a (fixed)

Vendor states this is fixed in 4.14 (unaffected)

Vendor states this is fixed in 5.10.166 (unaffected)

Vendor states this is fixed in 5.15.91 (unaffected)

Vendor states this is fixed in 5.4.231 (unaffected)

Vendor states this is fixed in 6.1.9 (unaffected)

Vendor states this is fixed in 6.2 (unaffected)