CVE-2026-31739Network attack vector

Kernel crash via misclassified asynchronous crypto algorithms

Published May 1, 2026 · Updated May 1, 2026

Use-after-free in the Linux Kernel's Tegra crypto driver allows remote authenticated users to crash systems via RPCSEC_GSS traffic. The driver omits CRYPTO_ALG_ASYNC from asynchronous AES and hash registrations, so synchronous callers can free request state before completion. The path requires registered Tegra crypto hardware and a network service using RPCSEC_GSS; a crash is confirmed, while broader memory compromise is not demonstrated.

CVSS severity8.8
High
EPSS probability0.41%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the Linux Kernel's Tegra crypto driver allows remote authenticated users to crash systems via RPCSEC_GSS traffic. The driver omits CRYPTO_ALG_ASYNC from asynchronous AES and hash registrations, so synchronous callers can free request state before completion. The path requires registered Tegra crypto hardware and a network service using RPCSEC_GSS; a crash is confirmed, while broader memory compromise is not demonstrated.

The record

CVE
CVE-2026-31739
Published
May 1, 2026
Updated
May 1, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-617, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 1, 2026CVE publishedPublication date reported by the CVE source.
  2. May 1, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0880bb3b00c855fc244b7177ffdaafef4d0aa1e0 <3aea268b6d5cde3b087df9eeecc3bc620aa09513
  2. Affected versionversion=0880bb3b00c855fc244b7177ffdaafef4d0aa1e0 <429d05565eb19ee545d8a8395991372adbe4daf3
  3. Affected versionversion=0880bb3b00c855fc244b7177ffdaafef4d0aa1e0 <4b56770d345524fc2acc143a2b85539cf7d74bc1
  4. Affected versionversion=0880bb3b00c855fc244b7177ffdaafef4d0aa1e0 <bdbf027a4504b4a86740de6beb6d18a957331839
  5. Affected versionversion=6.10

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=0880bb3b00c855fc244b7177ffdaafef4d0aa1e0 <3aea268b6d5cde3b087df9eeecc3bc620aa09513; version=0880bb3b00c855fc244b7177ffdaafef4d0aa1e0 <429d05565eb19ee545d8a8395991372adbe4daf3; version=0880bb3b00c855fc244b7177ffdaafef4d0aa1e0 <4b56770d345524fc2acc143a2b85539cf7d74bc1; version=0880bb3b00c855fc244b7177ffdaafef4d0aa1e0 <bdbf027a4504b4a86740de6beb6d18a957331839; version=6.10

Published CVSS scores

8.8Linux kernel CNACVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-617Reachable Assertion
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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