| Name | CVE-2025-40775 |
| Description | When an incoming DNS protocol message includes a Transaction Signature (TSIG), BIND always checks it. If the TSIG contains an invalid value in the algorithm field, BIND immediately aborts with an assertion failure. This issue affects BIND 9 versions 9.20.0 through 9.20.8 and 9.21.0 through 9.21.7. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| bind9 (PTS) | bullseye | 1:9.16.50-1~deb11u2 | fixed |
| bullseye (security) | 1:9.16.50-1~deb11u3 | fixed |
| bookworm, bookworm (security) | 1:9.18.33-1~deb12u2 | fixed |
| trixie | 1:9.20.8-6 | vulnerable |
| sid | 1:9.20.9-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| bind9 | source | bullseye | (not affected) | | | |
| bind9 | source | bookworm | (not affected) | | | |
| bind9 | source | (unstable) | 1:9.20.9-1 | | | |
Notes
[bookworm] - bind9 <not-affected> (Vulnerable code not present)
[bullseye] - bind9 <not-affected> (Vulnerable code not present)
https://kb.isc.org/docs/cve-2025-40775