Linux aws: In the Linux kernel, the following vulnerability has been resolved: crypto: ccp - copy IV using skcipher ivsize AF_ALG rfc3686-ctr-aes-ccp requests… (CVE-2026-53016)
In the Linux kernel, the following vulnerability has been resolved: crypto: ccp - copy IV using skcipher ivsize AF_ALG rfc3686-ctr-aes-ccp requests pass an 8-byte IV to the driver. ccp_aes_complete() restores AES_BLOCK_SIZE bytes into the caller's IV buffer while RFC3686 skciphers expose an 8-byte IV, so the restore overruns the provided buffer. Use crypto_skcipher_ivsize() to copy only the algorithm's IV length.
AI Analysis
Technical Summary
The Linux kernel crypto CCP driver incorrectly handles the IV size for AF_ALG RFC3686 CTR AES requests by copying an 8-byte IV but restoring 16 bytes (AES_BLOCK_SIZE) into the caller's IV buffer. This buffer overrun occurs because the driver does not use crypto_skcipher_ivsize() to determine the correct IV length, leading to memory corruption. The vulnerability has been resolved in Linux kernel versions 5.15.0-1112.119~20.04.1 and later.
Potential Impact
This vulnerability allows an attacker with local privileges to cause a buffer overrun in kernel memory, potentially leading to privilege escalation or system compromise. The CVSS 3.1 vector indicates low attack complexity and privileges required, with high impact on confidentiality, integrity, and availability.
Mitigation Recommendations
A fix is available in Linux kernel versions 5.15.0-1112.119~20.04.1 and later. Users should upgrade to these or newer kernel versions to remediate the vulnerability. No additional mitigations are indicated by the vendor advisory.
Linux aws: In the Linux kernel, the following vulnerability has been resolved: crypto: ccp - copy IV using skcipher ivsize AF_ALG rfc3686-ctr-aes-ccp requests… (CVE-2026-53016)
Description
In the Linux kernel, the following vulnerability has been resolved: crypto: ccp - copy IV using skcipher ivsize AF_ALG rfc3686-ctr-aes-ccp requests pass an 8-byte IV to the driver. ccp_aes_complete() restores AES_BLOCK_SIZE bytes into the caller's IV buffer while RFC3686 skciphers expose an 8-byte IV, so the restore overruns the provided buffer. Use crypto_skcipher_ivsize() to copy only the algorithm's IV length.
CVSS v3.1
Score 7.8high
Affected software
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protected]?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]?arch=source&distro=resoluteRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Linux kernel crypto CCP driver incorrectly handles the IV size for AF_ALG RFC3686 CTR AES requests by copying an 8-byte IV but restoring 16 bytes (AES_BLOCK_SIZE) into the caller's IV buffer. This buffer overrun occurs because the driver does not use crypto_skcipher_ivsize() to determine the correct IV length, leading to memory corruption. The vulnerability has been resolved in Linux kernel versions 5.15.0-1112.119~20.04.1 and later.
Potential Impact
This vulnerability allows an attacker with local privileges to cause a buffer overrun in kernel memory, potentially leading to privilege escalation or system compromise. The CVSS 3.1 vector indicates low attack complexity and privileges required, with high impact on confidentiality, integrity, and availability.
Mitigation Recommendations
A fix is available in Linux kernel versions 5.15.0-1112.119~20.04.1 and later. Users should upgrade to these or newer kernel versions to remediate the vulnerability. No additional mitigations are indicated by the vendor advisory.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-53016
- Osv Schema Version
- 1.7.0
- Aliases
- []
- Ecosystems
- ["Ubuntu:Pro:14.04:LTS","Ubuntu:Pro:16.04:LTS","Ubuntu:16.04:LTS","Ubuntu:Pro:FIPS:16.04:LTS","Ubuntu:Pro:18.04:LTS","Ubuntu:18.04:LTS","Ubuntu:Pro:FIPS-updates:18.04:LTS","Ubuntu:Pro:FIPS:18.04:LTS","Ubuntu:Pro:20.04:LTS","Ubuntu:20.04:LTS","Ubuntu:Pro:FIPS-updates:20.04:LTS","Ubuntu:Pro:FIPS:20.04:LTS","Ubuntu:22.04:LTS","Ubuntu:Nvidia-BlueField:22.04:LTS","Ubuntu:Pro:FIPS-preview:22.04:LTS","Ubuntu:Pro:FIPS-updates:22.04:LTS","Ubuntu:Pro:Realtime:22.04:LTS","Ubuntu:24.04:LTS","Ubuntu:Nvidia-BlueField:24.04:LTS","Ubuntu:Pro:FIPS-updates:24.04:LTS","Ubuntu:Pro:Realtime:24.04:LTS","Ubuntu:25.10","Ubuntu:26.04:LTS"]
- Database Specific Severity
- null
- Cvss Version
- 3.1
Threat ID: 6a5a015291ae9bcd3f802556
Added to database: 07/17/2026, 10:17:54 UTC
Last enriched: 07/30/2026, 20:52:52 UTC
Last updated: 07/31/2026, 19:30:19 UTC
Views: 1
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