NetBSD Signed Integer Overflow in cryptodev_op via cryptodev.c_CVE-2026-32849

5.7 / 10

MEDIUM

CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Description

NetBSD prior to commit ec8451e contains a signed integer overflow vulnerability in the cryptodev_op() function in sys/opencrypto/cryptodev.c where the local variable iov_len is declared as a signed int but assigned from an unsigned cop->dst_len value, causing 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 vulnerability by providing a dst_len value exceeding INT_MAX to trigger a kernel panic through NULL pointer dereference when CONFIG_SVS is disabled and corrupted UIO pointer arithmetic.

Basic Information

ID CVE-2026-32849

Source VulnCheck

Published May 18, 2026 at 17:42

Affected Product

Vendor NetBSD

Product src

Affected Versions NetBSD src 0

CWE Classification

CWE-190 CWE-476

References

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    "lastseen": "",
    "description": "NetBSD prior to commit ec8451e contains a signed integer overflow vulnerability in the cryptodev_op() function in sys/opencrypto/cryptodev.c where the local variable iov_len is declared as a signed int but assigned from an unsigned cop->dst_len value, causing 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 vulnerability by providing a dst_len value exceeding INT_MAX to trigger a kernel panic through NULL pointer dereference when CONFIG_SVS is disabled and corrupted UIO pointer arithmetic.",
    "published": "2026-05-18T17:42:29.642Z",
    "modified": "2026-05-18T17:42:29.642Z",
    "type": "cve",
    "title": "NetBSD Signed Integer Overflow in cryptodev_op via cryptodev.c",
    "source": "VulnCheck",
    "references": "https://nasm.re/posts/uaf_netbsd_crypto/\nhttps://github.com/NetBSD/src/commit/ec8451efc1565516aba9e7047e1a1a1ce7953a2f\nhttps://www.vulncheck.com/advisories/netbsd-signed-integer-overflow-in-cryptodev-op-via-cryptodev-c",
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    "sourceData": "NetBSD src 0",
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    "cvss": {
        "score": 5.7,
        "severity": "MEDIUM",
        "vector": "CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
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