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backport: Fix multi rrsig validation 0.26 - #3892

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Sep 5, 2026
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djc merged 2 commits into
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MartB:fix/multi-rrsig-validation-0.26

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@MartB

@MartB MartB commented Sep 5, 2026 •

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See merged main pr #3847 for more infos.

verify_default_rrset() races the RRSIG verifications with select_ok(),
but reported a failed signature as Ok(None), which select_ok() takes as
a success. The first RRSIG to complete decided the result, so an RRset
with a valid second signature could end up Bogus depending on the
order of the RRSIGs in the response. This affects zones signed with two
algorithms, such as mailbox.org.

Return an error for a failed signature instead, so the remaining
RRSIGs are tried before giving up.
Since 56abc2e only the RRSIG used for verification gets the RRset's
proof, any other RRSIG stays Indeterminate. The summary treated those
as not secure, so the server never set the AD bit for zones signed
with more than one algorithm.
@MartB MartB changed the title backport: Fix multi rrsig validation 0.26 #3847 backport: Fix multi rrsig validation 0.26 Sep 5, 2026
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djc enabled auto-merge September 5, 2026 14:21
@djc
djc added this pull request to the merge queue Sep 5, 2026
Merged via the queue into hickory-dns:release/0.26 with commit cfab556 Sep 5, 2026
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@MartB
MartB deleted the fix/multi-rrsig-validation-0.26 branch September 5, 2026 21:44
dadezzz pushed a commit to dadezzz/kube-dns-rs that referenced this pull request Sep 11, 2026
This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [hickory-resolver](https://hickory-dns.org/) ([source](https://github.com/hickory-dns/hickory-dns)) | dependencies | patch | `0.26.2` → `0.26.3` |
| [hickory-server](https://hickory-dns.org/) ([source](https://github.com/hickory-dns/hickory-dns)) | dependencies | patch | `0.26.2` → `0.26.3` |

---

### Release Notes

<details>
<summary>hickory-dns/hickory-dns (hickory-resolver)</summary>

### [`v0.26.3`](https://github.com/hickory-dns/hickory-dns/releases/tag/v0.26.3)

[Compare Source](hickory-dns/hickory-dns@v0.26.2...v0.26.3)

This release fixes regressions introduced in v0.26.2 related to DNSSEC verification, QUIC servers, HTTP/3 servers, and minimum dependency versions.

##### What's Changed

- Fix warnings (release/0.26) by [@&#8203;divergentdave](https://github.com/divergentdave) in [#&#8203;3877](hickory-dns/hickory-dns#3877)
- resolver: use lenient resolv.conf parsing by [@&#8203;djc](https://github.com/djc) in [#&#8203;3879](hickory-dns/hickory-dns#3879)
- backport: Fix multi rrsig validation 0.26 by [@&#8203;MartB](https://github.com/MartB) in [#&#8203;3892](hickory-dns/hickory-dns#3892)
- Bump version to 0.26.3 by [@&#8203;djc](https://github.com/djc) in [#&#8203;3895](hickory-dns/hickory-dns#3895)
- Exclude accepting QUIC connections from timeouts - 0.26 branch by [@&#8203;divergentdave](https://github.com/divergentdave) in [#&#8203;3906](hickory-dns/hickory-dns#3906)
- \[0.26] net: fix insecure ancestor delegation by [@&#8203;djc](https://github.com/djc) in [#&#8203;3907](hickory-dns/hickory-dns#3907)

**Full Changelog**: <hickory-dns/hickory-dns@v0.26.2...v0.26.3>

</details>

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