What is the CVSS score of CVE-2026-64255?

CVE-2026-64255 has a CVSS 3.1 base score of 8.8 (High). CVSS vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.2%.

Is there a patch available for CVE-2026-64255?

Yes, a patch is available for CVE-2026-64255. Update the affected software to the latest version immediately.

Linux CVE-2026-64255

EUVD-2026-48664 HIGH

Out-of-bounds Read (CWE-125)

2026-07-24 Linux

GHSA-3prq-7cqf-r4ww

Buffer Overflow Information Disclosure Linux

8.8

CVSS 3.1 · Vendor: Linux

Severity by source

Vendor (Linux) PRIMARY

8.8 HIGH

AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

SUSE

HIGH

qualitative

Red Hat

7.0 MEDIUM

qualitative

Primary rating from Vendor (Linux).

CVSS VectorVendor: Linux

Attack Vector

Adjacent

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Jul 27, 2026 - 05:26 vuln.today

CVSS changed

Jul 27, 2026 - 05:22 NVD

8.8 (HIGH)

Patch available

Jul 24, 2026 - 17:48 EUVD

CVE Published

Jul 24, 2026 - 15:31 cve.org

UNKNOWN (no severity yet)

CVE Published

Jul 24, 2026 - 15:31 cve.org

HIGH 8.8

DescriptionCVE.org

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

wifi: iwlwifi: mld: validate sta_mask before ffs() in BA session handlers

Three BA session handlers use ffs(ba_data->sta_mask) - 1 to derive a station ID without checking that sta_mask is non-zero. When sta_mask is zero, ffs() returns 0 and the subtraction wraps to 0xFFFFFFFF, causing an out-of-bounds access on fw_id_to_link_sta[].

Add WARN_ON_ONCE(!ba_data->sta_mask) guards before each ffs() call, consistent with the existing check in iwl_mld_ampdu_rx_start().

AnalysisAI

Out-of-bounds memory access in the Linux kernel’s iwlwifi wireless driver allows a remote attacker on the same WiFi network to corrupt kernel memory, potentially leading to code execution or system crash. The flaw occurs in Block Acknowledgment session handlers where the sta_mask field is not checked before being used to index an array, causing a wrap-around when the mask is zero. Affected are kernel versions prior to 6.18.38 and 7.1.3; no active exploitation or public exploit code is known at this time, and EPSS indicates a low probability of exploitation.

Same weakness CWE-125 – Out-of-bounds Read

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Vendor StatusVendor

SUSE

Severity: Important

Product	Status
SUSE Linux Enterprise Desktop 15 SP7	Affected
SUSE Linux Enterprise Desktop 15 SP7	Affected
SUSE Linux Enterprise High Availability Extension 15 SP7	Affected
SUSE Linux Enterprise High Availability Extension 15 SP7	Affected
SUSE Linux Enterprise High Availability Extension 16.0	Affected

CVE-2026-64255 vulnerability details – vuln.today

Back

Linux CVE-2026-64255

Severity by source

CVSS VectorVendor: Linux

Lifecycle Timeline

DescriptionCVE.org

AnalysisAI

Same weakness CWE-125 – Out-of-bounds Read

Same technique Buffer Overflow

Vendor StatusVendor

SUSE

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External POC / Exploit Code