VDB
GHSA-m5wq-r4r4-4qrh
GHSA-m5wq-r4r4-4qrh
PUBLISHED
CVSS 7.5 HIGH
Record from GitHub Advisory Database · Published March 20, 2026
Calling gethostbyaddr or gethostbyaddr_r with a configured nsswitch.conf that specifies the library's DNS backend in the GNU C Library version 2.34 to version 2.43 could, with a crafted response from the configured DNS server, result in a violation of the DNS specification that causes the application to treat a non-answer section of the DNS response as a valid answer.
Fixed versions
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| Package | Ecosystem | Fixed in |
|---|---|---|
| glibc | Wolfi | 2.43-r4 |
| glibc | Chainguard | 2.43-r4 |
| glibc-2.43 | Wolfi | 2.43-r4 |
| glibc-2.43 | Chainguard | 2.43-r4 |
Risk scores
CVSS 3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
| Vendor | Product | Versions |
|---|---|---|
| wolfi | glibc | 0 |
| chainguard | glibc | 0 |
| wolfi | glibc-2.43 | 0, * |
| chainguard | glibc-2.43 | 0, * |
Timeline
- Mar 20, 2026 CVE Published
- Apr 28, 2026 Security Advisory
- Jul 14, 2026 CVE Updated
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