CVE-2026-63985ethtool: eeprom: add more safeties to EEPROM Netlink fallback
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Analyzed
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | 96d971e307cc0e434f96329b42bbd98cfbca07d2 builds before 0e182689831277faf2ef683573a60474c208f690; 96d971e307cc0e434f96329b42bbd98cfbca07d2 builds before 6ed7ebe22e9c3e3e946b6973c1ce43d3c38aeac1; from 96d971e307cc0e434f96329b42bbd98cfbca07d2 before 65674d2489a12b8efd2ca0effb3de1d12224b596; from 96d971e307cc0e434f96329b42bbd98cfbca07d2 before d81376053a00865c70b8d8506a1cb93f2943d413; from 96d971e307cc0e434f96329b42bbd98cfbca07d2 before fd0de51c54fa8474a0ddeedd71c65ad09fada390; 96d971e307cc0e434f96329b42bbd98cfbca07d2 builds before 4fe1bc4b3603f621240d5b401742f302190db769; 96d971e307cc0e434f96329b42bbd98cfbca07d2 builds before 67cfdd9210b99f260b3e0afeb9525e0acc7be31e | CNA record |
linux linux_kernel linux:linux_kernel | from 5.13 before 5.15.210; from 5.16 before 6.1.176; from 6.2 before 6.6.143; from 6.7 before 6.12.93; from 6.13 before 6.18.35; from 6.19 before 7.0.12; 7.1; 7.1; and 3 more ranges | NVD |
References
- https://git.kernel.org/stable/c/0e182689831277faf2ef683573a60474c208f690patch
- https://git.kernel.org/stable/c/6ed7ebe22e9c3e3e946b6973c1ce43d3c38aeac1patch
- https://git.kernel.org/stable/c/65674d2489a12b8efd2ca0effb3de1d12224b596patch
- https://git.kernel.org/stable/c/d81376053a00865c70b8d8506a1cb93f2943d413patch
- https://git.kernel.org/stable/c/fd0de51c54fa8474a0ddeedd71c65ad09fada390patch
- https://git.kernel.org/stable/c/4fe1bc4b3603f621240d5b401742f302190db769patch
- https://git.kernel.org/stable/c/67cfdd9210b99f260b3e0afeb9525e0acc7be31epatch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.