PT-2026-41714 · Netbsd · Netbsd

Nasm + 1 · CVE-2026-32849 · Published 2026-05-18 · Updated 2026-05-18

Positive Technologies (AI Summary)

CVSS v4.0

5.7

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions NetBSD versions prior to commit ec8451e

Description A signed integer overflow exists in the cryptodev op() function within sys/opencrypto/cryptodev.c. The issue occurs because the local variable iov len is declared as a signed integer but is assigned a value from the unsigned cop->dst len variable, leading to undefined behavior when cop->dst len exceeds INT MAX. A local attacker with access to '/dev/crypto' and a compression session type can exploit this by providing a dst len value exceeding INT MAX. This can result in corrupted UIO pointer arithmetic or a kernel panic via NULL pointer dereference when CONFIG SVS is disabled.

Recommendations Update to the version containing commit ec8451e.

Exploit

Fix

NULL Pointer Dereference

Integer Overflow

Weakness Enumeration

CWE-476

CWE-190

Related Identifiers

CVE-2026-32849

Affected Products

Netbsd

References · 8

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/32xxx/CVE-2026-32849.json · Exploit
• 🔥 https://nasm.re/posts/uaf_netbsd_crypto · Exploit
• https://github.com/NetBSD/src/commit/ec8451efc1565516aba9e7047e1a1a1ce7953a2f · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-32849 · Security Note
• https://osv.dev/vulnerability/CVE-2026-32849 · Vendor Advisory
• https://github.com/NetBSD/src · Note
• https://vulncheck.com/advisories/netbsd-signed-integer-overflow-in-cryptodev-op-via-cryptodev-c · Note
• https://t.me/CVEtracker/54150 · Telegram Post