Linux Kernel Traffic Control (tc) Vulnerability Rated 7.8 CVSS

Last refreshed2026-10-15

Status: UPDATED | Advisory ID: CVE-2026-90177

Key Details

CVE	CVE-2026-90177
CVSS Score / Version	7.8 (High) / CVSS v3.1
Updated	2026-10-15
CVSS Vector	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`
CVSS Prose	attack vector is local; attack complexity is low; privileges required is low; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is high.
Affected products	Linux Kernel
Exploitation prediction (EPSS)	0.17% probability of exploitation in the next 30 days (5% percentile) -- FIRST.org's EPSS model.

Vendor	Product	Affected Versions	Patch Status
Linux	Linux Kernel

Vendor

Product

Affected Versions

Patch Status

Linux

Linux Kernel

Subsystems	OT Supporting Infrastructure
Sectors	All Sectors

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

bpf: Check pointer type for all atomic RMW paths

Atomic RMW verification records an instruction pointer type only when the

current destination is PTR_TO_ARENA. A second path can therefore reach the

same instruction with an ordinary pointer without comparing it against the

saved arena type.

The post-verification fixup uses the saved type to rewrite the instruction

to BPF_PROBE_ATOMIC for every path. Record the actual destination type for

all atomic RMW paths so the existing mismatch check rejects incompatible

uses of one instruction. (NVD)

Monitor Linux's web page for any future patch releases.

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-90177
CVE	https://www.cve.org/CVERecord?id=CVE-2026-90177

Source

Reference

NVD

CVE