PT-2026-27766 · Unknown · Cryptodev-Linux

Nasm · Published 2026-03-25 · Updated 2026-03-25 · CVE-2026-28529

Positive Technologies (AI Summary)

CVSS v4.0

8.5

High

Base vector

AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Name of the Vulnerable Software and Affected Versions cryptodev-linux versions 1.14 and prior

Description A flaw exists in the get userbuf function within the /dev/crypto device driver of cryptodev-linux. This flaw involves improper handling of page references, potentially leading to use-after-free conditions. Local users with access to the /dev/crypto interface can exploit this by repeatedly decreasing reference counts of pages they control, which may result in local privilege escalation.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

CVE-2026-28529

Affected Products

Cryptodev-Linux

References · 6

• 🔥 https://nasm.re/posts/cryptodev-linux-vuln · Exploit
• 🔥 https://gist.github.com/n4sm/0fd2479e0c23e0fa2f192cd8fda45750 · Exploit
• https://github.com/cryptodev-linux/cryptodev-linux/pull/104 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-28529 · Security Note
• https://twitter.com/nasm_re/status/2036824536054972656 · Twitter Post
• https://vulncheck.com/advisories/cryptodev-linux-get-userbuf-use-after-free-lpe · Note