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Fencer Vulns
high 7.5

CVE-2024-53270 json

HTTP/1: sending overload crashes when the request is reset beforehand in envoy

published 2024-12-18 22 mo ago modified 2026-09-08 2 mo ago also BIT-envoy-2024-53270 , EUVD-2024-51925 , GHSA-q9qv-8j52-77p3

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 53%
public exploits
0
none known

Summary

Envoy is a cloud-native high-performance edge/middle/service proxy. In affected versions `sendOverloadError` is going to assume the active request exists when `envoy.load_shed_points.http1_server_abort_dispatch` is configured. If `active_request` is nullptr, only onMessageBeginImpl() is called. However, the `onMessageBeginImpl` will directly return ok status if the stream is already reset leading to the nullptr reference. The downstream reset can actually happen during the H/2 upstream reset. As a result envoy may crash. This issue has been addressed in releases 1.32.3, 1.31.5, 1.30.9, and 1.29.12. Users are advised to upgrade. Users unable to upgrade may disable `http1_server_abort_dispatch` load shed point and/or use a high threshold.

Patch / fix

  • bitnami envoy 1.29.12, 1.30.9, 1.31.5, 1.32.3
  • envoyproxy envoy 1.29.12, 1.30.9, 1.31.5, 1.32.3

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2024-53270 updated cvss 7.5

envoy: HTTP/1: sending overload crashes when the request is reset beforehand in envoy

  • Red Hat OpenShift Service Mesh 2 openshift-service-mesh/pilot-rhel8, openshift-service-mesh/proxyv2-rhel8, openshift-service-mesh/istio-cni-rhel8
    affected: workaround, no fix available, no fix planned “Will not fix”
  • Red Hat RHOSSM 2.6 for RHEL 9 openshift-service-mesh/proxyv2-rhel9 2.6.5-4
    fixed: vendor fix RHSA-2025:1053
  • Red Hat RHOSSM 2.6 for RHEL 8 openshift-service-mesh/pilot-rhel8 2.6.5-5, openshift-service-mesh/grafana-rhel8 2.6.5-3, openshift-service-mesh/istio-cni-rhel8 2.6.5-5, openshift-service-mesh/ratelimit-rhel8 2.6.5-3, openshift-service-mesh/istio-rhel8-operator 2.6.5-4, openshift-service-mesh/kiali-rhel8-operator 1.89.9-4, +1 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
22 mo ago

Exploit prediction

0.70% chance of exploitation in the next 30 days, higher than 53% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/envoyproxy/envoy/security/advisories/GHSA-q9qv-8j52-77p3 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
OSV 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
bitnami envoy
<1.29.12
>=1.30.0, <1.30.9
>=1.31.0, <1.31.5
>=1.32.0, <1.32.3
1.29.12
1.30.9
1.31.5
1.32.3

Affected products

  • envoyproxy envoy

Classification

Weakness
  • CWE-670 Always-Incorrect Control Flow Implementation
  • CWE-476 NULL Pointer Dereference

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.