Vulnerability 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.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/NetBSD/src/commit/ec8451efc1565516aba9e7047e1a1a1ce7953a2f
- https://nasm.re/posts/uaf_netbsd_crypto/
- https://www.vulncheck.com/advisories/netbsd-signed-integer-overflow-in-cryptodev
FAQ
What is CVE-2026-32849?
CVE-2026-32849 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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 in...
How severe is CVE-2026-32849?
CVE-2026-32849 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-32849?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.