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CVE-2026-63987

ethtool: coalesce: cap profile updates at NET_DIM_PARAMS_NUM_PROFILES

HIGH
7.8
CVSS Score
Published: July 19, 2026 at 02:56 PM UTC
Updated: October 19, 2026 at 09:17 PM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
HIGH7.8
Exploit prediction
EPSS 0.1%
SSVC
No known exploit

Description

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).

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel· Linux
95%
6.11 ≤ v < 6.12.936.13 ≤ v < 6.18.356.19 ≤ v < 7.0.127.17.1 rc17.1 rc27.1 rc37.1 rc47.1 rc5f750dfe825b904164688adeb147950e0e0c4d262
Vendor states this is fixed in 0c02c190bcd9822477038ff2cee10ea584ac1b1d (fixed)
Vendor states this is fixed in 6205f7166d2dd14a017a5802c81e5bd1421a8635 (fixed)
Vendor states this is fixed in 7281b096b072f6c6e30420e3467d738f2e4c4b57 (fixed)
Vendor states this is fixed in d4c9cc7c47781c6f4fa29d80a1193a8bcd1525bc (fixed)
Vendor states this is fixed in 6.11 (unaffected)
Vendor states this is fixed in 6.12.93 (unaffected)
Vendor states this is fixed in 6.18.35 (unaffected)
Vendor states this is fixed in 7.0.12 (unaffected)
Vendor states this is fixed in 7.1 (unaffected)

References (4)

Patch
Source: cverecord
https://git.kernel.org/stable/c/d4c9cc7c47781c6f4fa29d80a1193a8bcd1525bc
Patch
Source: cverecord
https://git.kernel.org/stable/c/0c02c190bcd9822477038ff2cee10ea584ac1b1d
Patch
Source: cverecord
https://git.kernel.org/stable/c/6205f7166d2dd14a017a5802c81e5bd1421a8635
Patch
Source: cverecord
https://git.kernel.org/stable/c/7281b096b072f6c6e30420e3467d738f2e4c4b57

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.8HIGHLinux
Vector?

Quick Info

StatusMODIFIED
CWE
NVD-CWE-noinfoCWE-787

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