PT-2026-61304 · Linux · Linux

CVE-2026-63987 · Published 2026-07-19 · Updated 2026-07-19

Mitre

CVSS v3.1

7.8

High

Base vector

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

In the Linux kernel, the following vulnerability has been resolved:

ethtool: coalesce: cap profile updates at NET DIM PARAMS NUM PROFILES

ethnl update profile() walks the ETHTOOL A PROFILE IRQ MODERATION nest list with an index 'i' and writes new profile[i++] without bounding i. The destination is kmemdup()'d at NET DIM PARAMS NUM PROFILES entries (5), but the Netlink nest count is entirely user-controlled. Netlink policies do not have support for constraining the number of nested entries (or number of multi-attr entries).

Fix

Related Identifiers

CVE-2026-63987

Affected Products

Linux

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2026-63987 · Security Note
• https://git.kernel.org/stable/c/0c02c190bcd9822477038ff2cee10ea584ac1b1d · Note
• https://git.kernel.org/stable/c/6205f7166d2dd14a017a5802c81e5bd1421a8635 · Note
• https://git.kernel.org/stable/c/7281b096b072f6c6e30420e3467d738f2e4c4b57 · Note
• https://git.kernel.org/stable/c/d4c9cc7c47781c6f4fa29d80a1193a8bcd1525bc · Note