CVE-2026-0915— getnetbyaddr and getnetbyaddr_r leak stack contents to DNS resovler
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I. Basic Information for CVE-2026-0915
Vulnerability Information
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Vulnerability Title
getnetbyaddr and getnetbyaddr_r leak stack contents to DNS resovler
Source: NVD (National Vulnerability Database)
Vulnerability Description
Calling getnetbyaddr or getnetbyaddr_r with a configured nsswitch.conf that specifies the library's DNS backend for networks and queries for a zero-valued network in the GNU C Library version 2.0 to version 2.42 can leak stack contents to the configured DNS resolver.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
对未经初始化资源的使用
Source: NVD (National Vulnerability Database)
Vulnerability Title
GNU C Library 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
GNU C Library是GNU社区的一种按照LGPL许可协议发布的开源免费的C语言编译程序。 GNU C Library 2.0版本至2.42版本存在安全漏洞，该漏洞源于使用配置了DNS后端的nsswitch.conf调用getnetbyaddr或getnetbyaddr_r查询零值网络时，可能将堆栈内容泄露给配置的DNS解析器。
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 |
|---|---|---|---|---|
| The GNU C Library | glibc | 2.0 ~ 2.42 | - |
II. Public POCs for CVE-2026-0915
| # | POC Description | Source Link | Shenlong Link |
|---|---|---|---|
| 1 | Patch the Bug - glibc | https://github.com/cyberwulfy200-dev/CVE-2026-0915-json-Patch.-V2.0 | POC Details |
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IV. Related Vulnerabilities
Same product: glibc
- CVE-2026-6238
Buffer overread in ns_printrrf with corrupted RDATA field - CVE-2026-5435
Potential buffer overflow in ns_sprintrrf TSIG handling path - CVE-2026-5450
scanf %mc off-by-one heap buffer overflow - CVE-2026-5928
Potential buffer under-read in ungetwc - CVE-2026-4046
iconv crash due to assertion failure with untrusted input
Same vendor: The GNU C Library
- CVE-2026-6238
Buffer overread in ns_printrrf with corrupted RDATA field - CVE-2026-5435
Potential buffer overflow in ns_sprintrrf TSIG handling path - CVE-2026-5450
scanf %mc off-by-one heap buffer overflow - CVE-2026-5928
Potential buffer under-read in ungetwc - CVE-2026-4046
iconv crash due to assertion failure with untrusted input
Same weakness: CWE-908
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Windows Boot Manager Security Feature Bypass Vulnerability - CVE-2026-34543
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n8n has In-Process Memory Disclosure in its Task Runner - CVE-2025-12736
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V. Comments for CVE-2026-0915
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