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Vulnerability · Published Jul 19, 2026 · Assigned by Linux

CVE-2026-63987ethtool: coalesce: cap profile updates at NET_DIM_PARAMS_NUM_PROFILES

High 7.8

In plain English

A high-severity out-of-bounds write in Linux from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 3% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.1%top 97.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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 packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:9kernel5.14.0-687.65.1.el9_8ALSA-2026:93930
AlmaLinux:9kernel-64k5.14.0-687.65.1.el9_8ALSA-2026:93930
AlmaLinux:9kernel-64k-core5.14.0-687.65.1.el9_8ALSA-2026:93930
AlmaLinux:9kernel-64k-debug5.14.0-687.65.1.el9_8ALSA-2026:93930
AlmaLinux:9kernel-64k-debug-core5.14.0-687.65.1.el9_8ALSA-2026:93930
AlmaLinux:9kernel-64k-debug-modules5.14.0-687.65.1.el9_8ALSA-2026:93930
AlmaLinux:9kernel-64k-debug-modules-core5.14.0-687.65.1.el9_8ALSA-2026:93930
AlmaLinux:9kernel-64k-debug-modules-extra5.14.0-687.65.1.el9_8ALSA-2026:93930
AlmaLinux:9kernel-64k-modules5.14.0-687.65.1.el9_8ALSA-2026:93930
AlmaLinux:9kernel-64k-modules-core5.14.0-687.65.1.el9_8ALSA-2026:93930
AlmaLinux:9kernel-64k-modules-extra5.14.0-687.65.1.el9_8ALSA-2026:93930
AlmaLinux:9kernel-abi-stablelists5.14.0-687.65.1.el9_8ALSA-2026:93930
AlmaLinux:9kernel-core5.14.0-687.65.1.el9_8ALSA-2026:93930
AlmaLinux:9kernel-debug5.14.0-687.65.1.el9_8ALSA-2026:93930
AlmaLinux:9kernel-debug-core5.14.0-687.65.1.el9_8ALSA-2026:93930
AlmaLinux:9kernel-debug-modules5.14.0-687.65.1.el9_8ALSA-2026:93930
AlmaLinux:9kernel-debug-modules-core5.14.0-687.65.1.el9_8ALSA-2026:93930
AlmaLinux:9kernel-debug-modules-extra5.14.0-687.65.1.el9_8ALSA-2026:93930
AlmaLinux:9kernel-debug-uki-virt5.14.0-687.65.1.el9_8ALSA-2026:93930
AlmaLinux:9kernel-modules5.14.0-687.65.1.el9_8ALSA-2026:93930
AlmaLinux:9kernel-modules-core5.14.0-687.65.1.el9_8ALSA-2026:93930
AlmaLinux:9kernel-modules-extra5.14.0-687.65.1.el9_8ALSA-2026:93930
AlmaLinux:9kernel-tools5.14.0-687.65.1.el9_8ALSA-2026:93930
AlmaLinux:9kernel-tools-libs5.14.0-687.65.1.el9_8ALSA-2026:93930
AlmaLinux:9kernel-uki-virt5.14.0-687.65.1.el9_8ALSA-2026:93930
AlmaLinux:9kernel-uki-virt-addons5.14.0-687.65.1.el9_8ALSA-2026:93930
AlmaLinux:9kernel-zfcpdump5.14.0-687.65.1.el9_8ALSA-2026:93930
AlmaLinux:9kernel-zfcpdump-core5.14.0-687.65.1.el9_8ALSA-2026:93930
AlmaLinux:9kernel-zfcpdump-modules5.14.0-687.65.1.el9_8ALSA-2026:93930
AlmaLinux:9kernel-zfcpdump-modules-core5.14.0-687.65.1.el9_8ALSA-2026:93930
AlmaLinux:9kernel-zfcpdump-modules-extra5.14.0-687.65.1.el9_8ALSA-2026:93930
Debian:13linux6.12.94-1DEBIAN-CVE-2026-63987
Debian:14linux7.0.12-1DEBIAN-CVE-2026-63987
Rocky Linux:9kernel0:5.14.0-687.65.1.el9_8RLSA-2026:93930
Ubuntu:26.04:LTSlinux7.0.0-28.28UBUNTU-CVE-2026-63987
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2026-63987
Ubuntu:26.04:LTSlinux-aws7.0.0-1009.9UBUNTU-CVE-2026-63987
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2026-63987
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2026-63987
Ubuntu:24.04:LTSlinux-aws-6.17no fix listedUBUNTU-CVE-2026-63987
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2026-63987
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2026-63987
Ubuntu:26.04:LTSlinux-azure7.0.0-1010.10UBUNTU-CVE-2026-63987
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2026-63987
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2026-63987
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2026-63987
Ubuntu:24.04:LTSlinux-azure-6.17no fix listedUBUNTU-CVE-2026-63987
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2026-63987
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2026-63987
Ubuntu:24.04:LTSlinux-azure-7.07.0.0-1014.14~24.04.1UBUNTU-CVE-2026-63987
Ubuntu:26.04:LTSlinux-azure-fde7.0.0-1009.9UBUNTU-CVE-2026-63987
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2026-63987
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2026-63987
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2026-63987
Ubuntu:24.04:LTSlinux-azure-fde-7.07.0.0-1013.13~24.04.1UBUNTU-CVE-2026-63987
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2026-63987
Ubuntu:26.04:LTSlinux-gcp7.0.0-1008.8UBUNTU-CVE-2026-63987
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2026-63987
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2026-63987
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2026-63987
Ubuntu:24.04:LTSlinux-gcp-6.17no fix listedUBUNTU-CVE-2026-63987
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2026-63987
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2026-63987
Ubuntu:24.04:LTSlinux-gcp-7.07.0.0-1011.11~24.04.1UBUNTU-CVE-2026-63987
Ubuntu:26.04:LTSlinux-gke7.0.0-1003.4UBUNTU-CVE-2026-63987
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2026-63987
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2026-63987
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2026-63987
Ubuntu:24.04:LTSlinux-hwe-6.17no fix listedUBUNTU-CVE-2026-63987
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2026-63987
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2026-63987
Ubuntu:24.04:LTSlinux-hwe-7.07.0.0-28.28~24.04.1UBUNTU-CVE-2026-63987
Ubuntu:26.04:LTSlinux-ibm7.0.0-1010.10UBUNTU-CVE-2026-63987
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2026-63987
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2026-63987
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2026-63987
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2026-63987
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2026-63987
Ubuntu:26.04:LTSlinux-nvidia7.0.0-1016.16UBUNTU-CVE-2026-63987
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2026-63987
Ubuntu:24.04:LTSlinux-nvidia-6.17no fix listedUBUNTU-CVE-2026-63987
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2026-63987
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2026-63987
Ubuntu:24.04:LTSlinux-nvidia-7.07.0.0-1016.16~24.04.1UBUNTU-CVE-2026-63987
Ubuntu:26.04:LTSlinux-nvidia-bos7.0.0-2016.16UBUNTU-CVE-2026-63987
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2026-63987
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2026-63987
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2026-63987
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2026-63987
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2026-63987
Ubuntu:24.04:LTSlinux-oem-6.17no fix listedUBUNTU-CVE-2026-63987
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2026-63987
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2026-63987
Ubuntu:26.04:LTSlinux-oem-7.07.0.0-1009.9UBUNTU-CVE-2026-63987
Ubuntu:26.04:LTSlinux-oracle7.0.0-1008.8UBUNTU-CVE-2026-63987
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2026-63987
Ubuntu:24.04:LTSlinux-oracle-6.17no fix listedUBUNTU-CVE-2026-63987
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2026-63987
Ubuntu:24.04:LTSlinux-oracle-7.07.0.0-1011.11~24.04.1UBUNTU-CVE-2026-63987
Ubuntu:26.04:LTSlinux-raspi7.0.0-1015.15UBUNTU-CVE-2026-63987
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2026-63987
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-63987
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-63987
Ubuntu:26.04:LTSlinux-realtime7.0.0-28.28.1UBUNTU-CVE-2026-63987
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-63987
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-63987
Ubuntu:26.04:LTSlinux-riscv7.0.0-28.28.1UBUNTU-CVE-2026-63987
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2026-63987
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2026-63987
Ubuntu:24.04:LTSlinux-riscv-6.17no fix listedUBUNTU-CVE-2026-63987
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2026-63987
Ubuntu:24.04:LTSlinux-riscv-7.07.0.0-28.28.1~24.04.3UBUNTU-CVE-2026-63987
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2026-63987
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2026-63987
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2026-63987

Affected products (as reported)

VendorProductVersions
Linux Linux f750dfe825b904164688adeb147950e0e0c4d262 – before d4c9cc7c47781c6f4fa29d80a1193a8bcd1525bcf750dfe825b904164688adeb147950e0e0c4d262 – before 0c02c190bcd9822477038ff2cee10ea584ac1b1df750dfe825b904164688adeb147950e0e0c4d262 – before 6205f7166d2dd14a017a5802c81e5bd1421a8635f750dfe825b904164688adeb147950e0e0c4d262 – before 7281b096b072f6c6e30420e3467d738f2e4c4b57
Linux Linux 6.11

Weakness: CWE-787 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References