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Fencer Vulns
high 8.1

CVE-2026-92392 json

HTTP/2 upload Use-After-Free

published 2026-10-14 26 d ago modified 2026-10-20 19 d ago also EUVD-2026-100915

cvss
8.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.3%
EPSS 1.3% chance of exploitation in 30 days, percentile 70%
public exploits
0
none known

Summary

During an upload, curl mishandles HTTP/2 `RST_STREAM` received from the server (with reason `HTTP_1_1_REQUIRED` or `REFUSED_STREAM`) leading to a use after free of a `struct Curl_easy` object.

Patch / fix

  • haxx curl 8.14.3, 8.16.2, 8.20.2, 8.23.0
  • curl Debian 13 8.14.1-2+deb13u7

debian advisories DEBIAN-CVE-2026-92392

  • curl Ubuntu 26.10 8.20.0-2ubuntu11.1
  • curl Ubuntu 26.04 LTS 8.18.0-1ubuntu2.8

ubuntu advisories UBUNTU-CVE-2026-92392

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • curl hummingbird 1 8.23.0-0.1.hum1
  • libcurl hummingbird 1 8.23.0-0.1.hum1
  • libcurl-minimal hummingbird 1 8.23.0-0.1.hum1
  • rust hummingbird 1 1.99.0-1.hum1
  • cargo hummingbird 1 1.99.0-1.hum1
  • clippy hummingbird 1 1.99.0-1.hum1
  • rustfmt hummingbird 1 1.99.0-1.hum1
  • rust-gdb hummingbird 1 1.99.0-1.hum1

red hat advisories RHSA-2026:82895RHSA-2026:80349

  • curl SLE Module for Basesystem 15 SP7 8.22.0-150700.7.33.1
  • curl SLES 15 SP5-LTSS, SLES 15 SP4-LTSS, SLE Micro 5.5 +8 more 8.14.1-150400.5.98.1
  • curl SLES for SAP 15 SP6, SLES 15 SP6-LTSS 8.22.0-150600.4.58.1

suse advisories SUSE-SU-2026:5069-1SUSE-SU-2026:5068-1SUSE-SU-2026:4954-1

  • curl openSUSE Tumbleweed 8.23.0-1.1

opensuse advisories openSUSE-SU-2026:12150-1

  • curl AlmaLinux 10 8.12.1-4.el10_2.8
  • libcurl AlmaLinux 10 8.12.1-4.el10_2.8
  • libcurl-minimal AlmaLinux 10 8.12.1-4.el10_2.8

almalinux advisories ALSA-2026:96092

  • curl Alpine 3.21 8.14.1-r3
  • curl Alpine 3.22 8.14.1-r4
  • curl Alpine 3.24, Alpine 3.23 8.23.0-r0

alpine advisories ALPINE-CVE-2026-92392

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

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-2026-92392 updated cvss 8.1

curl: curl: HTTP/2 upload Use-After-Free

  • Red Hat Enterprise Linux AppStream (v. 10) libcurl-devel 8.12.1-4.el10_2.8, curl-debuginfo 8.12.1-4.el10_2.8, curl-debugsource 8.12.1-4.el10_2.8, libcurl-debuginfo 8.12.1-4.el10_2.8, libcurl-minimal-debuginfo 8.12.1-4.el10_2.8 Red Hat Enterprise Linux BaseOS (v. 10) curl 8.12.1-4.el10_2.8, libcurl 8.12.1-4.el10_2.8, libcurl-minimal 8.12.1-4.el10_2.8
    fixed: vendor fix RHSA-2026:96092
  • Red Hat Hardened Images rust 1.99.0-1.hum1, cargo 1.99.0-1.hum1, clippy 1.99.0-1.hum1, curl 8.23.0-0.1.hum1, rustfmt 1.99.0-1.hum1, rust-gdb 1.99.0-1.hum1, +14 more
    fixed: vendor fix RHSA-2026:80349
  • Red Hat Confidential Compute Attestation build-of-trustee/trustee-rhel9, openshift-sandboxed-containers/osc-podvm-payload-rhel9 Red Hat Enterprise Linux 6 curl, libcurl Red Hat Enterprise Linux 7 curl, libcurl Red Hat Enterprise Linux 8 rls, curl, rust, cargo, clippy, libcurl, +11 more Red Hat Enterprise Linux 9 curl, rust, cargo, clippy, libcurl, rustfmt, +13 more Red Hat Enterprise Linux 10 igvm, rust, snphost, trustee, s390utils
    +2 more products
    Red Hat JBoss Core Services jbcs-httpd24-curl, jbcs-httpd24-libcurl Red Hat Satellite 6 foreman, foreman-cli, foreman-ec2, foreman-gce, puppet-agent, foreman-ovirt, +11 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
total
Assessed
25 d ago

Exploit prediction

1.28% chance of exploitation in the next 30 days, higher than 70% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • hackerone.com https://hackerone.com/reports/4030333 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CISA ADP 3.1 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

  • curl curl

Classification

Weakness

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.