AZL-96950
See a problem?- Import Source
- https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-96950.json
- JSON Data
- https://api.osv.dev/v1/vulns/AZL-96950
- Upstream
- Published
- 2026-08-20T18:16:36Z
- Modified
- 2026-09-10T14:17:04Z
- Summary
- CVE-2026-63387 affecting package libevent for versions less than 2.1.13-1
- Details
-
Libevent is an event notification library. Prior to 2.1.13 and 2.2.2-alpha, libevent has an off-by-one stack buffer overflow in evdns.c when dnsname_to_labels formats a name-bearing DNS record at the end of the 64 KB stack buffer allocated by evdns_server_request_format_response. The final-label check permits j plus label_len plus one to equal buf_len, after which the terminating null byte is written to buf[buf_len]. A crafted DNS server response containing PTR, CNAME, MX, NS, or SOA data can trigger the one-byte out-of-bounds write and crash or corrupt the process. This issue is fixed in versions 2.1.13 and 2.2.2-alpha.
- References