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Linux CVE-2026-64303

| EUVDEUVD-2026-49015 CRITICAL
Use After Free (CWE-416)
2026-07-25 Linux GHSA-8g65-pg22-jqr9
Buffer Overflow Linux Use After Free Memory Corruption
Critical
Disputed · 9.8 Vendor: Linux
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Severity by source

Sources disagree (Medium–Critical)
Vendor (Linux) PRIMARY
9.8 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SUSE
5.8 MEDIUM
AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H
Red Hat
7.0 HIGH
qualitative

vuln.today treats the vendor’s rating as authoritative. A higher third-party CVSS (e.g. CISA-ADP) is shown for transparency but does not drive the headline severity.

CVSS VectorVendor: Linux

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

5
Analysis Generated
Jul 27, 2026 - 05:33 vuln.today
CVSS changed
Jul 27, 2026 - 05:22 NVD
9.8 (CRITICAL)
Patch available
Jul 25, 2026 - 11:18 EUVD
CVE Published
Jul 25, 2026 - 08:49 cve.org
UNKNOWN (no severity yet)
CVE Published
Jul 25, 2026 - 08:49 cve.org
CRITICAL 9.8

DescriptionCVE.org

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

spi: fsl-lpspi: terminate the RX channel on TX prepare failure path

When dmaengine_prep_slave_sg() fails for the TX channel, the error path terminates the TX DMA channel but leaves the RX channel running. Since the RX channel was already submitted and issued prior to preparing the TX descriptor, returning -EINVAL causes the SPI core to unmap the DMA buffers while the RX DMA engine continues writing to them, leading to potential memory corruption or use-after-free.

Terminate the RX channel before returning on the TX prepare failure path.

AnalysisAI

Use-after-free vulnerability in the Linux kernel's fsl-lpspi SPI driver can lead to memory corruption or arbitrary code execution with kernel privileges. A local attacker with high privileges on systems using the affected driver can trigger this flaw, potentially causing a kernel panic or full system compromise. At time of analysis, no public exploit or active exploitation is identified, and EPSS indicates low exploitation probability (0.22%).

Same weakness CWE-416 – Use After Free

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Same technique Buffer Overflow

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CVE-2009-0927 HIGH POC
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CVE-2012-1889 HIGH POC
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Vendor StatusVendor

SUSE

Severity: Moderate
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

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CVE-2026-64303 vulnerability details – vuln.today
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