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Linux EUVDEUVD-2026-49024

| CVE-2026-64312 HIGH
2026-07-25 Linux GHSA-5wjw-79g3-g2x9
Information Disclosure Linux
7.5
CVSS 3.1 · Vendor: Linux
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Severity by source

Vendor (Linux) PRIMARY
7.5 HIGH
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SUSE
HIGH
qualitative
Red Hat
7.0 MEDIUM
qualitative

Primary rating from Vendor (Linux).

CVSS VectorVendor: Linux

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

Lifecycle Timeline

5
Analysis Generated
Jul 27, 2026 - 05:34 vuln.today
CVSS changed
Jul 27, 2026 - 05:22 NVD
7.5 (HIGH)
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
HIGH 7.5

DescriptionCVE.org

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

crypto: pcrypt - restore callback for non-parallel fallback

pcrypt installs pcrypt_aead_done() on the child AEAD request before trying to submit it through padata. If padata_do_parallel() returns -EBUSY, pcrypt falls back to calling the child AEAD directly.

That fallback must not keep the padata completion callback. Otherwise an asynchronous completion runs pcrypt_aead_done() even though the request was never enrolled in padata.

Restore the original request callback and callback data before calling the child AEAD directly. This keeps the fallback path aligned with a direct AEAD request while leaving the parallel path unchanged.

AnalysisAI

Denial of service in the Linux kernel's pcrypt crypto template allows remote unauthenticated attackers to crash the system by triggering a faulty fallback path. When the parallel execution via padata fails (e.g., due to resource pressure), the pcrypt module does not restore the original callback, leading to unsafe execution of the parallel-only completion routine and kernel memory corruption. The vulnerability has a low EPSS score (0.22%, 13th percentile), no public exploit or active exploitation, and patches are available in multiple stable kernel series.

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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

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EUVD-2026-49024 vulnerability details – vuln.today
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