CVE-2026-14456

Aliases:UBUNTU-CVE-2026-14456DEBIAN-CVE-2026-14456RHSA-2026:56097ALPINE-CVE-2026-14456CGA-2ppv-r4hv-jx33CGA-2x4v-f88x-wgmxCGA-35mx-c7ph-5wqgCGA-36gj-w863-j9mhCGA-5945-g4x2-xfmqCGA-6rvx-cjv3-fjpjCGA-93ch-6vxx-3pjvCGA-fq88-94gm-g9r9CGA-gc6w-2x98-r76wCGA-jfcj-jfm4-h7gjCGA-p7xj-xqpj-mc43CGA-39cj-9g8f-fjp2CGA-3whq-6wr2-276jCGA-5r9p-9gq5-mx67CGA-5xcq-h89p-h3xjCGA-8gwq-6353-663vCGA-cxxp-2m33-pq52CGA-hc7m-3h9x-w8xrCGA-mcg4-pv9j-q45rCGA-p72q-8cxv-3vx7CGA-q39r-r5jj-9539CGA-qchw-xc4v-23mfCGA-rf3c-9vcc-5pfqCGA-w6r7-pqf5-57vfCGA-whw8-5ph3-8pfmCGA-x4jp-5c7q-v482
Advisory lineage Upstream: 1 Downstream: 8
Upstream
CVE-2026-54876
Awaiting Analysis
Published: 13 Aug 2026, 13:55
Last modified:13 Aug 2026, 17:41

Vulnerability Summary

Overall Risk (default)
medium
30/100
CVSS Score
7.5 HIGH
v3.1 (cve.org)
EPSS Score
0.73% LOW
1% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

13 Aug 2026, 13:55
Published
Vulnerability first disclosed
13 Aug 2026, 17:41
Last Modified
Vulnerability information updated

Description

Issue summary: When an OpenSSL QUIC server (Listener SSL object) processes valid QUIC Initial packets for unknown destination connection IDs, it can allocate and queue new incoming channels without enforcing any limit. Impact summary: A remote peer that can make many Initial packets reach the server listener faster than the application accepts connections, can cause the memory allocated to store the per-channel state to grow without any limits, potentially making the QUIC listener unavailable and causing Denial of Service. CWE: CWE-770: Allocation of Resources Without Limits or Throttling Description: The function that handles inbound QUIC packets uses Connection-Id from the packet header to find an existing connection (QUIC channel). If no existing connection is found and the packet type is INITIAL, the function treats the packet as a new connection. It allocates a new channel object and inserts it into a queue where it waits to be accepted by the local application with SSL_accept(3ossl). The memory occupied by these initial channel objects may grow without bounds if the application is not able to call SSL_accept() frequently enough to serve these inbound connection requests. The issue is present since OpenSSL 3.5 when the QUIC server implementation was added. The fix introduces a limit for pending connections. The default limit is set to 256 pending connections (waiting to be accepted by the local application). Applications may change the default by calling SSL_set_value_uint(3ossl). FIPS impact: no The FIPS module is not affected as the QUIC implementation is outside of the OpenSSL FIPS module boundary.

CVSS Metrics

  • v3.1•HIGH•Score: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Trends

Current EPSS score: 0.73%• Percentile: 53%

Techniques & Countermeasures

  • CWE-770•Allocation of Resources Without Limits or Throttling

    The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.

Affected Systems

  • alpine•openssl

    < 3.5.8-r0 | < 3.5.8-r0 | < 3.5.8-r0

  • chainguard•eco-python-openssl-4

    all | < 4.0.2-r0

  • chainguard•eco-python-openssl-4-pyca

    all | < 4.0.2-r0

  • chainguard•eco-python-openssl-4-pyca-dev

    all | < 4.0.2-r0

  • chainguard•libcrypto3

    < 3.6.3-r5

  • chainguard•libcrypto3-2.34

    < 3.6.3-r3

  • chainguard•libssl3

    < 3.6.3-r5

  • chainguard•openssl

    < 3.6.3-r5

  • chainguard•openssl-dbg

    < 3.6.3-r5

  • chainguard•openssl-dev

    < 3.6.3-r5

  • chainguard•openssl-doc

    < 3.6.3-r5

  • chainguard•openssl-provider-fips-3.6.0

    < 0

  • chainguard•openssl-provider-fips-3.6.0-dbg

    < 0

  • chainguard•openssl-provider-legacy

    < 3.6.3-r5

  • wolfi•libcrypto3

    < 3.6.3-r5

  • wolfi•libssl3

    < 3.6.3-r5

  • wolfi•openssl

    < 3.6.3-r5

  • wolfi•openssl-dbg

    < 3.6.3-r5

  • wolfi•openssl-dev

    < 3.6.3-r5

  • wolfi•openssl-doc

    < 3.6.3-r5

  • wolfi•openssl-provider-legacy

    < 3.6.3-r5

  • debian•openssl

    all | all | all | all | < 3.5.7-1~deb13u2 | < 3.6.4-1

  • ubuntu•edk2

    all | all | all | all | all

  • ubuntu•edk2-hwe

    all

  • ubuntu•nodejs

    all

  • ubuntu•openssl

    all | all | all | all | < 3.5.5-1ubuntu3.4

  • ubuntu•openssl-fips

    all

  • ubuntu•openssl1.0

    all

  • openssl•openssl

    ≥ 4.0.0, < 4.0.2 | ≥ 3.6.0, < 3.6.4 | ≥ 3.5.0, < 3.5.8

  • redhat•openssl

    < 0:3.5.6-0.5.hum1

References (25)