Out-of-bounds write in musl libc
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.
Summary
Multiple stack-based buffer overflows in the __dn_expand function in network/dn_expand.c in musl libc 1.1x before 1.1.2 and 0.9.13 through 1.0.3 allow remote attackers to (1) have unspecified impact via an invalid name length in a DNS response or (2) cause a denial of service (crash) via an invalid name length in a DNS response, related to an infinite loop with no output.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | musl libc | 1.1x to before 1.1.2; 0.9.13 through 1.0.3 | 1.1.2 | Patch available | CNA |
- musl libc Vendor— Affected 1.1x to before 1.1.2; 0.9.13 through 1.0.3 Fixed in 1.1.2 Patch available CNA
Remediation
- Fix · CNA musl libc Fixed in 1.1.2
Timeline
- 2026-10-02 Threatist record created from CVE-2014-3484
- 2026-10-03 Alias added: GHSA-j83j-g9hw-7wvp
References
More musl-libc Musl vulnerabilities
- TI-2019-10919 musl libc through 1.1.23 has an x87 floating-point stack adjustment imbalance, related to… CVSS 3.1CRITICAL 9.8
- TI-2015-01634 Stack-based buffer overflow in the inet_pton function in network/inet_pton.c in musl libc… CVSS 3.0CRITICAL 9.8
- TI-2025-19457 Out-of-bounds write in musl-libc musl CVSS 3.1HIGH 8.1
- TI-2017-11441 musl libc before 1.1.17 has a buffer overflow via crafted DNS replies because… CVSS 3.0HIGH 7.5
- TI-2020-17460 In musl libc through 1.2.1, wcsnrtombs mishandles particular combinations of destination… CVSS 3.1MEDIUM 5.5
Sources
- CVE-2014-3484 · CVE Program
- CVE-2014-3484 · NVD
- FIRST EPSS
- GHSA-j83j-g9hw-7wvp · GitHub Advisory Database · CC BY 4.0
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