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CVE-2026-32849— NetBSD Signed Integer Overflow in cryptodev_op via cryptodev.c

Quick assessment

Affected
NetBSD src
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

NetBSD是NetBSD基金会的一套开源的类Unix操作系统。 NetBSD ec8451之前版本存在输入验证错误漏洞，该漏洞源于cryptodev_op函数中局部变量iov_len声明为有符号整数但赋值来自无符号值，可能导致有符号整数溢出。

CVSS 5.5 · Medium EPSS 0.15% · P4

Affected Version Matrix 1

VendorProduct Version RangeStatus
NetBSD src < ec8451efc1565516aba9e7047e1a1a1ce7953a2f affected
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I. Basic Information for CVE-2026-32849

Vulnerability Information
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Vulnerability Title
NetBSD Signed Integer Overflow in cryptodev_op via cryptodev.c
Source: CVE Program / CVE List V5
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
整数溢出或超界折返
Source: CVE Program / CVE List V5
Vulnerability Title
NetBSD 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
NetBSD是NetBSD基金会的一套开源的类Unix操作系统。 NetBSD ec8451之前版本存在输入验证错误漏洞，该漏洞源于cryptodev_op函数中局部变量iov_len声明为有符号整数但赋值来自无符号值，可能导致有符号整数溢出。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
NetBSD src 0 ~ ec8451efc1565516aba9e7047e1a1a1ce7953a2f -

II. Public POCs for CVE-2026-32849

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III. Intelligence Information for CVE-2026-32849

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Patches & Fixes for CVE-2026-32849 (1)

Vendor Advisories for CVE-2026-32849 (1)

Security Blog Posts for CVE-2026-32849 (1)

IV. Related Vulnerabilities

Same product: src
Same vendor: NetBSD
Same weakness: CWE-190

V. Comments for CVE-2026-32849

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