Is there a patch available for CVE-2026-99072?

Yes, a patch is available for CVE-2026-99072. Update the affected software to the latest version immediately.

Linux CVE-2026-99072

EUVD-2026-108738

2026-10-23 Linux

GHSA-wrfx-ch9c-5jj2

Information Disclosure Linux

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Monitor Track and reassess. Why: No CVSS yet + weak signal (CWE or non-zero EPSS).

Patch available 0.2% exploitation probability (EPSS)

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AnalysisCVE.org

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

ipv4: stop route notification sizing when nexthop group shrinks

Commit 680aea08e78c ("net: ipv4: Emit notification when fib hardware flags are changed") added an RCU-only fib_nlmsg_size() call for asynchronous hardware flag notifications.

fib_nlmsg_size() checks fib_info_num_path() before each iteration, then fib_info_nhc() independently reloads nh->nh_grp. If RTM_NEWNEXTHOP replaces a group with fewer paths between those loads, fib_info_nhc() returns NULL and fib_nexthop_nlmsg_size() dereferences it.

Stop sizing when the indexed path is absent. Nexthop groups are dense, so the current snapshot has no later path.

Affected VersionsENISA

Linux patch: 6.12.113

Linux 680aea08e78c003292415518ad270bc20f9c80b1 <72d9d17092bb37b0717f12042a0817d01a1f9e78

Linux patch: 7.2.11

Linux 680aea08e78c003292415518ad270bc20f9c80b1 <d3daa33c7af92e38f2274bbd2576f58bfbaf89e6

Linux 680aea08e78c003292415518ad270bc20f9c80b1 <ad1c9f1b98c92609e9bb2ae8f05916defc3b0a54

Linux 5.12

Linux 680aea08e78c003292415518ad270bc20f9c80b1 <ad2b3a68b8a7d5d27de88e05674e4adb1ce46d88

Linux patch: 0

Linux patch: 7.3

Linux patch: 6.18.57

Linux patch: 6.6.160

Linux 680aea08e78c003292415518ad270bc20f9c80b1 <c1f48d1c2d5e9efd904dbbc2f2b3d41543e55c49

Affected Packages

euvd linux no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

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Exploit and PoC references, threat intelligence from 22 sources

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Lifecycle Timeline

Patch available

Oct 23, 2026 - 13:17 EUVD

CVE Published

Oct 23, 2026 - 12:23 cve.org

UNKNOWN (no severity yet)

Threat Intelligence Overview

EPSS Score

0.2%

Top 90% exploitable

Data Quality

3 sources

Confidence: Low

EUVD

CVE.org

EPSS MSRC

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity Not scored yet

CISA KEV No

Public POC No

EPSS 0.2%

Patch available Yes

Active threat No

Deciding rule

No CVSS yet + weak signal (CWE or non-zero EPSS)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

Attack Technique

Information Disclosure MEDIUM

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.