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CVE-2026-63985— ethtool: eeprom: add more safeties to EEPROM Netlink fallback

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会开源的一款操作系统内核。 Linux kernel 5.13版本存在安全漏洞，该漏洞源于ethtool EEPROM Netlink回退路径中的fallback_set_params()函数未检查offset + length是否在eeprom_len范围内，导致可能导致驱动程序和设备固件出现意外问题。

CVSS 7.8 · High EPSS 0.13% · P2

Possible ATT&CK Techniques 1 AI

T1005 · Data from Local System

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux Linux 96d971e307cc0e434f96329b42bbd98cfbca07d2< 0e182689831277faf2ef683573a60474c208f690 affected
96d971e307cc0e434f96329b42bbd98cfbca07d2< 6ed7ebe22e9c3e3e946b6973c1ce43d3c38aeac1 affected
96d971e307cc0e434f96329b42bbd98cfbca07d2< 65674d2489a12b8efd2ca0effb3de1d12224b596 affected
96d971e307cc0e434f96329b42bbd98cfbca07d2< d81376053a00865c70b8d8506a1cb93f2943d413 affected
96d971e307cc0e434f96329b42bbd98cfbca07d2< fd0de51c54fa8474a0ddeedd71c65ad09fada390 affected
96d971e307cc0e434f96329b42bbd98cfbca07d2< 4fe1bc4b3603f621240d5b401742f302190db769 affected
96d971e307cc0e434f96329b42bbd98cfbca07d2< 67cfdd9210b99f260b3e0afeb9525e0acc7be31e affected
5.13 affected
… +8 more rows
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I. Basic Information for CVE-2026-63985

Vulnerability Information
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Vulnerability Title
ethtool: eeprom: add more safeties to EEPROM Netlink fallback
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ethtool: eeprom: add more safeties to EEPROM Netlink fallback The Netlink fallback path for reading module EEPROM (fallback_set_params()) validates that offset < eeprom_len, but does not check that offset + length stays within eeprom_len. The ioctl equivalent (ethtool_get_any_eeprom() in ioctl.c) has always enforced both bounds: if (eeprom.offset + eeprom.len > total_len) return -EINVAL; This could lead to surprises in both drivers and device FW. Add the missing offset + length validation to fallback_set_params(), mirroring the ioctl. Similarly - ethtool core in general, and ethtool_get_any_eeprom() in particular tries to zero-init all buffers passed to the drivers to avoid any extra work of zeroing things out. eeprom_fallback() uses a plain kmalloc(), change it to zalloc.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会开源的一款操作系统内核。 Linux kernel 5.13版本存在安全漏洞，该漏洞源于ethtool EEPROM Netlink回退路径中的fallback_set_params()函数未检查offset + length是否在eeprom_len范围内，导致可能导致驱动程序和设备固件出现意外问题。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 96d971e307cc0e434f96329b42bbd98cfbca07d2 ~ 0e182689831277faf2ef683573a60474c208f690 -
Linux Linux 5.13 -

II. Public POCs for CVE-2026-63985

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III. Intelligence Information for CVE-2026-63985

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Patches & Fixes for CVE-2026-63985 (7)

Same Patch Batch · Linux · 2026-07-19 · 429 CVEs total

CVE-2026-63795 10.0 CRITICAL 9p: avoid putting oldfid in p9_client_walk() error path
CVE-2026-64066 9.8 CRITICAL netfs: Fix netfs_read_to_pagecache() to pause on subreq failure
CVE-2026-63994 9.8 CRITICAL tunnels: load network headers after skb_cow() in iptunnel_pmtud_build_icmp[v6]()
CVE-2026-64033 9.8 CRITICAL RDMA/rtrs: Fix use-after-free in path file creation cleanup
CVE-2026-64142 9.8 CRITICAL ksmbd: close durable scavenger races against m_fp_list lookups
CVE-2026-63993 9.8 CRITICAL vxlan: do not reuse cached ip_hdr() value after skb_tunnel_check_pmtu()
CVE-2026-53399 9.8 CRITICAL nfsd: release layout stid on setlease failure
CVE-2026-53398 9.8 CRITICAL NFSD: Fix SECINFO_NO_NAME decode error cleanup
CVE-2026-64061 9.8 CRITICAL netfs: Fix early put of sink folio in netfs_read_gaps()
CVE-2026-64089 9.8 CRITICAL batman-adv: tt: fix negative last_changeset_len
CVE-2026-64025 9.8 CRITICAL bpf, skmsg: fix verdict sk_data_ready racing with ktls rx
CVE-2026-64091 9.8 CRITICAL batman-adv: tt: fix TOCTOU race for reported vlans
CVE-2026-64125 9.8 CRITICAL net: bcmgenet: keep RBUF EEE/PM disabled
CVE-2026-64132 9.8 CRITICAL ipv6: ioam: refresh hdr pointer before ioam6_event()
CVE-2026-63887 9.8 CRITICAL scsi: target: iscsi: Bound iscsi_encode_text_output() appends to rsp_buf
CVE-2026-64136 9.8 CRITICAL smb: client: protect tc_count increment in smb2_find_smb_sess_tcon_unlocked()
CVE-2026-63979 9.8 CRITICAL net/handshake: hand off the pinned file reference to accept_doit
CVE-2026-63888 9.8 CRITICAL scsi: target: iscsi: Fix CRC overread and double-free in iscsit_handle_text_cmd()
CVE-2026-63978 9.8 CRITICAL net/handshake: Drain pending requests at net namespace exit
CVE-2026-63808 9.8 CRITICAL exfat: fix potential use-after-free in exfat_find_dir_entry()

Showing top 20 of 429 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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