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7.5
HIGH CVSS 3.1
CVE-2026-64312
crypto: pcrypt - restore callback for non-parallel fallback
Overview
Description

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.

Details
INFO

Published Date :

July 25, 2026, 10:17 a.m.

Last Modified :

Aug. 17, 2026, 5:17 a.m.

Remotely Exploit :

Yes !

Source :

416baaa9-dc9f-4396-8d5f-8c081fb06d67
Impact
Affected Products

The following products are affected by CVE-2026-64312 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Linux linux_kernel
: Total Affected Vendor : 1 | Products : 1
Scoring
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 HIGH 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
Restore original callback data before calling child AEAD directly in pcrypt.
  • Restore original request callback and data.
  • Call child AEAD directly for fallback.
  • Keep parallel path unchanged.
References
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2026-64312.

URL Resource
https://git.kernel.org/stable/c/3920c5f6edc341729d20d0507e466c6d3b11f372
https://git.kernel.org/stable/c/4711ca06bd169a2cbc9cc59a6de2ed512c41a880
https://git.kernel.org/stable/c/81ce16d938db9b88cdc231522c0358395ae8c6b5
https://git.kernel.org/stable/c/82789a44415e3e31168229421b138278dfb16412
https://git.kernel.org/stable/c/83fa1397d5853de1e27dd52ec44b068ff358ca18
https://git.kernel.org/stable/c/ae93c5b3e2a2968b56d772ca1d06615927b7cc36
https://git.kernel.org/stable/c/c4bd2f4c35b0e15b6040c2f7e7e7986780c066cf
https://git.kernel.org/stable/c/ed459fe319376e876de433d12b6c6772e612ca36
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-64312 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-64312 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-64312 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2026-64312 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Aug. 17, 2026

    Action Type Old Value New Value
    Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'a92ccd3618e42333ac6f150ecdac14dca298bc7a', 'lessThan': '81ce16d938db9b88cdc231522c0358395ae8c6b5', 'versionType': 'git'}, {'status': 'affected', 'version': '96001f52ae8c70e2c736d3e1e5dc53d5b521e5ca', 'lessThan': '3920c5f6edc341729d20d0507e466c6d3b11f372', 'versionType': 'git'}, {'status': 'affected', 'version': '92834692a539b5b7f409e467a14667d64713b732', 'lessThan': 'ae93c5b3e2a2968b56d772ca1d06615927b7cc36', 'versionType': 'git'}, {'status': 'affected', 'version': '5edae7a9a35606017ee6e05911c290acee9fee5a', 'lessThan': '82789a44415e3e31168229421b138278dfb16412', 'versionType': 'git'}, {'status': 'affected', 'version': '7ddab756f2de5b7b43c122ebebdf37f400fb2b6f', 'lessThan': '4711ca06bd169a2cbc9cc59a6de2ed512c41a880', 'versionType': 'git'}, {'status': 'affected', 'version': '662f2f13e66d3883b9238b0b96b17886179e60e2', 'lessThan': 'c4bd2f4c35b0e15b6040c2f7e7e7986780c066cf', 'versionType': 'git'}, {'status': 'affected', 'version': '662f2f13e66d3883b9238b0b96b17886179e60e2', 'lessThan': '83fa1397d5853de1e27dd52ec44b068ff358ca18', 'versionType': 'git'}, {'status': 'affected', 'version': '662f2f13e66d3883b9238b0b96b17886179e60e2', 'lessThan': 'ed459fe319376e876de433d12b6c6772e612ca36', 'versionType': 'git'}, {'status': 'affected', 'version': 'dd8bf8eb5beba1e7c3b11a9a5a58ccbf345a69e6', 'versionType': 'git'}, {'status': 'affected', 'version': 'fca8aed12218f96b38e374ff264d78ea1fbd23cc', 'versionType': 'git'}, {'status': 'affected', 'version': 'a8e0074ffb38c9a5964a221bb998034d016c93a2', 'versionType': 'git'}, {'status': 'affected', 'version': '5.10.231', 'lessThan': '5.10.261', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.15.174', 'lessThan': '5.15.212', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.1.120', 'lessThan': '6.1.178', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.6.64', 'lessThan': '6.6.145', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.12.2', 'lessThan': '6.12.96', 'versionType': 'semver'}, {'status': 'affected', 'version': '4.19.325', 'lessThan': '4.20', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.4.287', 'lessThan': '5.5', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.11.11', 'lessThan': '6.12', 'versionType': 'semver'}], 'programFiles': ['crypto/pcrypt.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.13'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.13', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.96', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['crypto/pcrypt.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'a92ccd3618e42333ac6f150ecdac14dca298bc7a', 'lessThan': '81ce16d938db9b88cdc231522c0358395ae8c6b5', 'versionType': 'git'}, {'status': 'affected', 'version': '96001f52ae8c70e2c736d3e1e5dc53d5b521e5ca', 'lessThan': '3920c5f6edc341729d20d0507e466c6d3b11f372', 'versionType': 'git'}, {'status': 'affected', 'version': '92834692a539b5b7f409e467a14667d64713b732', 'lessThan': 'ae93c5b3e2a2968b56d772ca1d06615927b7cc36', 'versionType': 'git'}, {'status': 'affected', 'version': '5edae7a9a35606017ee6e05911c290acee9fee5a', 'lessThan': '82789a44415e3e31168229421b138278dfb16412', 'versionType': 'git'}, {'status': 'affected', 'version': '7ddab756f2de5b7b43c122ebebdf37f400fb2b6f', 'lessThan': '4711ca06bd169a2cbc9cc59a6de2ed512c41a880', 'versionType': 'git'}, {'status': 'affected', 'version': '662f2f13e66d3883b9238b0b96b17886179e60e2', 'lessThan': 'c4bd2f4c35b0e15b6040c2f7e7e7986780c066cf', 'versionType': 'git'}, {'status': 'affected', 'version': '662f2f13e66d3883b9238b0b96b17886179e60e2', 'lessThan': '83fa1397d5853de1e27dd52ec44b068ff358ca18', 'versionType': 'git'}, {'status': 'affected', 'version': '662f2f13e66d3883b9238b0b96b17886179e60e2', 'lessThan': 'ed459fe319376e876de433d12b6c6772e612ca36', 'versionType': 'git'}, {'status': 'affected', 'version': 'dd8bf8eb5beba1e7c3b11a9a5a58ccbf345a69e6', 'versionType': 'git'}, {'status': 'affected', 'version': 'fca8aed12218f96b38e374ff264d78ea1fbd23cc', 'versionType': 'git'}, {'status': 'affected', 'version': 'a8e0074ffb38c9a5964a221bb998034d016c93a2', 'versionType': 'git'}, {'status': 'affected', 'version': '5.10.231', 'lessThan': '5.10.261', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.15.174', 'lessThan': '5.15.212', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.1.120', 'lessThan': '6.1.178', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.6.64', 'lessThan': '6.6.145', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.12.2', 'lessThan': '6.12.96', 'versionType': 'semver'}, {'status': 'affected', 'version': '4.19.325', 'lessThan': '4.20', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.4.287', 'lessThan': '5.5', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.11.11', 'lessThan': '6.12', 'versionType': 'semver'}], 'programFiles': ['crypto/pcrypt.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.13'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.13', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.96', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['crypto/pcrypt.c'], 'defaultStatus': 'affected'}]
  • CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Jul. 27, 2026

    Action Type Old Value New Value
    Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  • New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Jul. 25, 2026

    Action Type Old Value New Value
    Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'a92ccd3618e42333ac6f150ecdac14dca298bc7a', 'lessThan': '81ce16d938db9b88cdc231522c0358395ae8c6b5', 'versionType': 'git'}, {'status': 'affected', 'version': '96001f52ae8c70e2c736d3e1e5dc53d5b521e5ca', 'lessThan': '3920c5f6edc341729d20d0507e466c6d3b11f372', 'versionType': 'git'}, {'status': 'affected', 'version': '92834692a539b5b7f409e467a14667d64713b732', 'lessThan': 'ae93c5b3e2a2968b56d772ca1d06615927b7cc36', 'versionType': 'git'}, {'status': 'affected', 'version': '5edae7a9a35606017ee6e05911c290acee9fee5a', 'lessThan': '82789a44415e3e31168229421b138278dfb16412', 'versionType': 'git'}, {'status': 'affected', 'version': '7ddab756f2de5b7b43c122ebebdf37f400fb2b6f', 'lessThan': '4711ca06bd169a2cbc9cc59a6de2ed512c41a880', 'versionType': 'git'}, {'status': 'affected', 'version': '662f2f13e66d3883b9238b0b96b17886179e60e2', 'lessThan': 'c4bd2f4c35b0e15b6040c2f7e7e7986780c066cf', 'versionType': 'git'}, {'status': 'affected', 'version': '662f2f13e66d3883b9238b0b96b17886179e60e2', 'lessThan': '83fa1397d5853de1e27dd52ec44b068ff358ca18', 'versionType': 'git'}, {'status': 'affected', 'version': '662f2f13e66d3883b9238b0b96b17886179e60e2', 'lessThan': 'ed459fe319376e876de433d12b6c6772e612ca36', 'versionType': 'git'}, {'status': 'affected', 'version': 'dd8bf8eb5beba1e7c3b11a9a5a58ccbf345a69e6', 'versionType': 'git'}, {'status': 'affected', 'version': 'fca8aed12218f96b38e374ff264d78ea1fbd23cc', 'versionType': 'git'}, {'status': 'affected', 'version': 'a8e0074ffb38c9a5964a221bb998034d016c93a2', 'versionType': 'git'}, {'status': 'affected', 'version': '5.10.231', 'lessThan': '5.10.261', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.15.174', 'lessThan': '5.15.212', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.1.120', 'lessThan': '6.1.178', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.6.64', 'lessThan': '6.6.145', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.12.2', 'lessThan': '6.12.96', 'versionType': 'semver'}, {'status': 'affected', 'version': '4.19.325', 'lessThan': '4.20', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.4.287', 'lessThan': '5.5', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.11.11', 'lessThan': '6.12', 'versionType': 'semver'}], 'programFiles': ['crypto/pcrypt.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.13'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.13', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.96', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['crypto/pcrypt.c'], 'defaultStatus': 'affected'}]
    Added Description 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.
    Added Reference https://git.kernel.org/stable/c/3920c5f6edc341729d20d0507e466c6d3b11f372
    Added Reference https://git.kernel.org/stable/c/4711ca06bd169a2cbc9cc59a6de2ed512c41a880
    Added Reference https://git.kernel.org/stable/c/81ce16d938db9b88cdc231522c0358395ae8c6b5
    Added Reference https://git.kernel.org/stable/c/82789a44415e3e31168229421b138278dfb16412
    Added Reference https://git.kernel.org/stable/c/83fa1397d5853de1e27dd52ec44b068ff358ca18
    Added Reference https://git.kernel.org/stable/c/ae93c5b3e2a2968b56d772ca1d06615927b7cc36
    Added Reference https://git.kernel.org/stable/c/c4bd2f4c35b0e15b6040c2f7e7e7986780c066cf
    Added Reference https://git.kernel.org/stable/c/ed459fe319376e876de433d12b6c6772e612ca36
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CVSS
Vulnerability Scoring Details
Base CVSS Score: 7.5
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact