CVE-2026-42579
Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final and 4.1.133.Final, Netty's DNS codec does not en
CVSS
7.5
Alta
EPSS
1.0%
p63
KEV
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Exploit Today
19
0-100
Publicado: 13 de mai. de 2026 · Última mod.: 18 de set. de 2026 · CWE-20 · CWE-400 · CWE-626
0.8%EPSS · 30 dias1.0%
2026-10-102026-11-07
Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final and 4.1.133.Final, Netty's DNS codec does not enforce RFC 1035 domain name constraints during either encoding or decoding. This creates a bidirectional attack surface: malicious DNS responses can exploit the decoder, and user-influenced hostnames can exploit the encoder. This vulnerability is fixed in 4.2.13.Final and 4.1.133.Final.
- github.comhttps://github.com/netty/netty/security/advisories/GHSA-cm33-6792-r9fm
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:23808
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:24502
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:25123
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:28010
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:36820
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:37390
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:49700
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:49701
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:53644
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:53645
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:53646
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:54435
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:65126
- access.redhat.comhttps://access.redhat.com/security/cve/CVE-2026-42579
- bugzilla.redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=2477217
- github.comhttps://github.com/netty/netty/security/advisories/GHSA-cm33-6792-r9fm
- security.access.redhat.comhttps://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42579.json
CVECVSSEPSSKEVRExploitTítuloMod.
CVE-2026-1236135.3 MÉD—
———Rustls from 0.23.13 before 0.23.45 accepts TLS 1.3 handshake messages at the wrong encryption level when they follow a key-changing message in the same record, because Deframer::aligned does not enforce RFC 8446 record-boundary alignment. A peer or on-path attacker can pack a plaintext EncryptedExtensions with the ServerHello, which rustls accepts unencrypted.7hCVE-2026-1236067.5 ALT—
———The hickory-dns recursor in hickory-recursor 0.25.0-alpha.3 through 0.25.2 and hickory-resolver 0.26.0-alpha.1 before 0.26.2 iterates every out-of-bailiwick NS target lacking glue in a referral without any per-query work budget. Remote attackers can serve such referrals to force A and AAAA lookups per target, amplifying traffic against remote servers or exhausting recursor resources.7hCVE-2026-1235867.5 ALT—
———Hickory DNS 0.25.0-alpha.3 through 0.25.2 contains a query amplification vulnerability in its recursive resolver, which mishandles cyclic sibling name server referrals that lack glue records. Attackers controlling two zones whose name servers reference each other without glue records can make the recursor loop, sending many upstream queries, amplified further by zero-TTL NS records.7hCVE-2026-1235855.3 MÉD—
———The hickory-resolver component of Hickory DNS 0.25.0 before 0.26.2 follows irrelevant CNAME records when resolving recursive queries, sending queries that are unnecessary to answer the original request. Attackers controlling DNS responses can include CNAME records in the authority or additional sections, or outside the original query name's CNAME chain, causing excess resolver queries and increased query amplification.7hCVE-2026-1235747.5 ALT—
———The zone file parser in the hickory-proto crate of Hickory DNS 0.24.0 before 0.26.2 panics when a single token in a zone file is 4096 bytes or longer. Attackers who can supply untrusted zone files to an application using the parser can trigger the panic to cause a denial of service.7hCVE-2026-1235737.5 ALT—
———hickory-dns from 0.20.1 before 0.26.2 contains a denial of service vulnerability in the hickory-proto SVCB and HTTPS record presentation format parser. Attackers can supply untrusted zone files where only a single or double quote replaces a service parameter value, triggering a panic that crashes the parsing process.7h