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CVE-2026-49759— Stack buffer overflow in SCTP error cause parsing in inet_drv allows remote VM crash

Quick assessment

Affected
Erlang OTP
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.

Erlang/OTP是Erlang/OTP开源的一个JavaScript编写的处理处理异常的库。该库可以捕捉node.js内置API引发的异常。 Erlang/OTP erts 15.2.7.9之前版本、16.4.0.2版本和17.0.2版本存在安全漏洞，该漏洞源于inet_drv中sctp_parse_error_chunk函数在解析SCTP ERROR块时未检查边界，导致栈缓冲区溢出，未经身份验证的远程攻击者可通过发送特制SCTP ERROR块导致BEAM VM崩溃，限制为拒绝服务攻击。

CVSS 8.8 · High EPSS 0.50% · P41

Affected Version Matrix 4

VendorProduct Version RangeStatus
Erlang OTP 17.0< * affected
6.0< * affected
84adefa331c4159d432d22840663c38f155cd4c1< 3983d495284331c121f600a80bac9fcf4e16381e affected
3983d495284331c121f600a80bac9fcf4e16381e< * unaffected
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I. Basic Information for CVE-2026-49759

Vulnerability Information
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Vulnerability Title
Stack buffer overflow in SCTP error cause parsing in inet_drv allows remote VM crash
Source: CVE Program / CVE List V5
Vulnerability Description
Stack-based Buffer Overflow vulnerability in Erlang OTP erts (inet_drv) allows an unauthenticated remote attacker to crash the BEAM VM by sending a crafted SCTP ERROR chunk. The sctp_parse_error_chunk function in erts/emulator/drivers/common/inet_drv.c parses SCTP ERROR chunks and writes cause codes into a fixed-size stack-allocated ErlDrvTermData spec[] array without checking bounds. A remote attacker who has established an SCTP association to a listening port can send a single crafted SCTP ERROR chunk containing enough cause codes to overflow the stack buffer, crashing the VM. The attacker can only write 16-bit values interleaved with a fixed tag, so the overflow does not provide a controlled return address, limiting exploitation to Denial of Service. A crafted SCTP ERROR chunk may also leak bits and pieces of Erlang VM memory into the received error packet observed by the Erlang process. Such data is already readable by the user running the Erlang VM, so the disclosure scope is limited. This issue affects OTP from OTP 17.0 before OTP 27.3.4.13, OTP 28.5.0.2, and OTP 29.0.2, corresponding to erts from 6.0 before 15.2.7.9, 16.4.0.2, and 17.0.2. Whether OTP before OTP 17.0, corresponding to erts before 6.0, is affected is unknown.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
栈缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
Erlang/OTP 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Erlang/OTP是Erlang/OTP开源的一个JavaScript编写的处理处理异常的库。该库可以捕捉node.js内置API引发的异常。 Erlang/OTP erts 15.2.7.9之前版本、16.4.0.2版本和17.0.2版本存在安全漏洞，该漏洞源于inet_drv中sctp_parse_error_chunk函数在解析SCTP ERROR块时未检查边界，导致栈缓冲区溢出，未经身份验证的远程攻击者可通过发送特制SCTP ERROR块导致BEAM VM崩溃，限制为拒绝服务攻击。
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
Erlang OTP 17.0 ~ * cpe:2.3:a:erlang:erlang\/otp:*:*:*:*:*:*:*:*
Erlang OTP 6.0 ~ * cpe:2.3:a:erlang:erlang\/otp:*:*:*:*:*:*:*:*
Erlang OTP 84adefa331c4159d432d22840663c38f155cd4c1 ~ 3983d495284331c121f600a80bac9fcf4e16381e cpe:2.3:a:erlang:erlang\/otp:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-49759

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III. Intelligence Information for CVE-2026-49759

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Patches & Fixes for CVE-2026-49759 (1)

Vendor Advisories for CVE-2026-49759 (3)

Same Patch Batch · Erlang · 2026-06-10 · 7 CVEs total

CVE-2026-48860 7.5 HIGH Distribution-over-TLS LAN allowlist silently bypassed due to sockname/peername confusion i
CVE-2026-48856 7.1 HIGH httpc leaks Authorization header to cross-origin redirect targets
CVE-2026-49760 6.9 MEDIUM Stack Buffer Overflow in ei_s_print_term at Very Large Integer
CVE-2026-48859 6.3 MEDIUM SSH server timing side-channel in ssh_auth:check_password/3 allows unauthenticated usernam
CVE-2026-48858 6.3 MEDIUM ftp client PASV response IP not validated against control peer, enabling SSRF and FTP boun
CVE-2026-48855 2.3 LOW SFTP READLINK Leaks Absolute Backend Filesystem Path When Root Is Configured

IV. Related Vulnerabilities

Same product: OTP
Same vendor: Erlang
Same weakness: CWE-121

V. Comments for CVE-2026-49759

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