Is there a patch available for CVE-2026-99097?

Yes, a patch is available for CVE-2026-99097. Update the affected software to the latest version immediately.

Linux CVE-2026-99097

EUVD-2026-109903

2026-10-26 Linux

GHSA-6fpw-5chx-rgh9

Information Disclosure Linux

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Awaiting Data No severity or threat signals available yet. Label will update when CVSS score is published or threat intelligence arrives. 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:

tee: shm: reject zero-sized allocations in tee_dyn_shm_alloc_helper()

tee_dyn_shm_alloc_helper() derives nr_pages from a caller-supplied size and passes it to alloc_pages_exact() without checking it. For size == 0 nr_pages is 0, and alloc_pages_exact(0) calls get_order(0), which is documented as undefined and returns BITS_PER_LONG - PAGE_SHIFT. The page allocator then trips its order > MAX_PAGE_ORDER warning and fails the allocation; on a panic_on_warn kernel that ends the boot.

This can be triggered by TEE_IOC_SHM_ALLOC with struct tee_ioctl_shm_alloc_data where size is 0.

Reject a zero page count, as register_shm_helper() already does for the register path.

Affected VersionsENISA

Linux patch: 7.3

Linux cf4441503e20a0c0a36e0a98dcf57de3d3844c91 <e5dc7af9c3a5373ee7a84959126e7dfa9e4ad50d

Linux cf4441503e20a0c0a36e0a98dcf57de3d3844c91 <b7f925fd5226deb953c8dcdc9677d3fcc2717c00

Linux 6.10

Linux patch: 7.2.11

Linux patch: 0

Linux cf4441503e20a0c0a36e0a98dcf57de3d3844c91 <65cb86860a80ffc6af897d53f5bd4b1733bca0ec

Linux patch: 6.12.113

Linux cf4441503e20a0c0a36e0a98dcf57de3d3844c91 <c2a97703359e25ec7ef8b2b0ef32fb3982add90a

Linux patch: 6.18.57

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 26, 2026 - 16:17 EUVD

CVE Published

Oct 26, 2026 - 14:52 cve.org

UNKNOWN (no severity yet)

Threat Intelligence Overview

EPSS Score

0.2%

Top 94% exploitable

Social Media

Sightings

Data Quality

1 sources

Confidence: Low

EUVD

CVE.org

EPSS CIRCL

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.