CVE catalog

CVE-2026-44893

Netty is a network application framework for development of protocol servers and clients. In netty-codec-haproxy prior to versions 4.1.135.Final and 4.2.15.Final, when decoding a PP2_TYPE_SSL TLV, HAP

[CVE catalog]

Severity
High · CVSS 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
Source
[NVD] · [CVE record]
EPSS
0.62% · Oct 27, 2026

Netty is a network application framework for development of protocol servers and clients. In netty-codec-haproxy prior to versions 4.1.135.Final and 4.2.15.Final, when decoding a PP2_TYPE_SSL TLV, HAProxyMessage.readNextTLV() first calls `header.retainedSlice(header.readerIndex(), length)` and only then reads the 1-byte client field and 4-byte verify field. If the attacker sets the TLV length below 5, the subsequent readByte/readInt throws IndexOutOfBoundsException. HAProxyMessageDecoder only catches HAProxyProtocolException around this call, so the IOOBE propagates and the retained slice on the pooled cumulation buffer is never released. Versions 4.1.135.Final and 4.2.15.Final patch the issue.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

DistributionPackageReleaseVersionStatus
Debiannettysid1:4.1.48-16vulnerable
Debiannettyforky1:4.1.48-16vulnerable
Debiannettytrixie1:4.1.48-10+deb13u1vulnerable
Debiannettytrixie-security1:4.1.48-10+deb13u1vulnerable
Debiannettybookworm1:4.1.48-7+deb12u2vulnerable
Debiannettybookworm-security1:4.1.48-7+deb12u2vulnerable
CpenettyNot reportedNot reportedvulnerable
CpenettyNot reported4.1.135fixed
CpenettyNot reported4.2.15fixed
CpenettyNot reported4.2.15fixed

Fixed-version evidence

DistributionPackageTypeReleaseFixed versionUrgencyOriginBugs
Debiannettysourcesid(unfixed)not yet assignedNot reported[1139914]
Debiannettysourceforky(unfixed)not yet assignedNot reported[1139914]
Debiannettysourcetrixie(unfixed)not yet assignedNot reported[1139914]
Debiannettysourcebookworm(unfixed)not yet assignedNot reported[1139914]
CpenettycpeNot reported4.1.135Not reportedNot reportedNot reported
CpenettycpeNot reported4.2.15Not reportedNot reportedNot reported
CpenettycpeNot reported4.2.15Not reportedNVD-CVE-2026-44893Not reported

[Debian bug #1139914]

OpenFactory catalog packages

[Debian 12 (Bookworm)]

  • [libnetty-java]Affected

    Source package: [netty]

    Details (4)

    • 1:4.1.48-7+deb12u2 · all · bookworm

      Affected

      nvd · netty · debian · bookworm; nvd · netty · debian · 12

    • 1:4.1.48-7+deb12u2 · all · bookworm

      Affected

      nvd · netty · debian · bookworm; nvd · netty · debian · 12

    • 1:4.1.48-7+deb12u2 · all · bookworm-security

      Affected

      nvd · netty · debian · bookworm; nvd · netty · debian · 12

    • 1:4.1.48-7+deb12u2 · all · bookworm-security

      Affected

      nvd · netty · debian · bookworm; nvd · netty · debian · 12

[Debian 13 (Trixie)]

  • [libnetty-java]Affected

    Source package: [netty]

    Details (4)

    • 1:4.1.48-10+deb13u1 · all · trixie

      Affected

      nvd · netty · debian · 13

    • 1:4.1.48-10+deb13u1 · all · trixie

      Affected

      nvd · netty · debian · 13

    • 1:4.1.48-10+deb13u1 · all · trixie-security

      Affected

      nvd · netty · debian · 13

    • 1:4.1.48-10+deb13u1 · all · trixie-security

      Affected

      nvd · netty · debian · 13

Observed:

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]