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CVE-2025-71137: octeontx2-pf: fix "UBSAN: shift-out-of-bounds error"

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-01-14 · updated 2026-06-17
• Weakness: CWE-787

Description

In the Linux kernel, the following vulnerability has been resolved: octeontx2-pf: fix "UBSAN: shift-out-of-bounds error" This patch ensures that the RX ring size (rx_pending) is not set below the permitted length. This avoids UBSAN shift-out-of-bounds errors when users passes small or zero ring sizes via ethtool -G.

Affected products

• Linux kernel: from 5.6.1 before 5.10.248; from 5.11 before 5.15.198; from 5.16 before 6.1.160; from 6.2 before 6.6.120; from 6.7 before 6.12.64; from 6.13 before 6.18.4 — fixed in 5.10.248, 5.15.198, 6.1.160, 6.12.64, 6.18.4, 6.6.120

How to fix

Upgrade to a fixed version: Linux kernel 5.10.248, 5.15.198, 6.1.160, 6.12.64. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/442848e457f5a9f71a4e7e14d24d73dae278ebe3
• https://git.kernel.org/stable/c/4cc4cfe4d23c883120b6f3d41145edbaa281f2ab
• https://git.kernel.org/stable/c/5d8dfa3abb9a845302e021cf9c92d941abbc011a
• https://git.kernel.org/stable/c/658caf3b8aad65f8b8e102670ca4f68c7030f655
• https://git.kernel.org/stable/c/85f4b0c650d9f9db10bda8d3acfa1af83bf78cf7
• https://git.kernel.org/stable/c/aa743b0d98448282b2cb37356db8db2a48524624
• https://git.kernel.org/stable/c/b23a2e15589466a027c9baa3fb5813c9f6a6c6dc

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