EUVD-2026-30789
GHSA-rf6w-j5hg-8rcv
CVSS VectorNVD
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
2DescriptionNVD
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.
AnalysisAI
Signed integer overflow in the NetBSD kernel's cryptodev subsystem (sys/opencrypto/cryptodev.c, prior to commit ec8451e) enables a local low-privileged attacker to crash the kernel via a NULL pointer dereference, causing a full denial of service. The type mismatch between a signed int local variable and an unsigned cop->dst_len source value in cryptodev_op() produces undefined behavior when dst_len exceeds INT_MAX, corrupting UIO pointer arithmetic and - when CONFIG_SVS is disabled - triggering a kernel panic. …
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External POC / Exploit Code
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