Medium 5.5Published Sep 11, 2025

CVE-2025-39777crypto: acomp - Fix CFI failure due to type punning

Updated under an hour ago (Oct 28, 2026, 8:00 AM ET)

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Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: crypto: acomp - Fix CFI failure due to type punning To avoid a crash when control flow integrity is enabled, make the workspace ("stream") free function use a consistent type, and call it through a function pointer that has that same type.

CVSS: 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Analyzed
Record last updated: May 11, 2026
First seen by InfoSec Signals: Oct 19, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	42d9f6c774790d290c175e8775ce9f1366438098 builds before 7ec68c59461ca846aab9b7c2b39f63ac7c8a43cf; from 42d9f6c774790d290c175e8775ce9f1366438098 before 962ddc5a7a4b04c007bba0f3e7298cda13c62efd	CNA record
linux linux_kernel linux:linux_kernel	from 6.16 before 6.16.4	NVD

References

References

https://git.kernel.org/stable/c/7ec68c59461ca846aab9b7c2b39f63ac7c8a43cf	patch
https://git.kernel.org/stable/c/962ddc5a7a4b04c007bba0f3e7298cda13c62efd	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.