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Fencer Vulns
critical 9.8

CVE-2024-4741 in the critical feed json

Use After Free with SSL_free_buffers

published 2024-11-13 23 mo ago modified 2026-11-06 2 d ago also EUVD-2024-44338 , GHSA-6vgq-8qjq-h578 , JLSEC-2026-251

cvss
9.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
2.9%
EPSS 2.9% chance of exploitation in 30 days, percentile 87%
public exploits
0
none known

Summary

Issue summary: Calling the OpenSSL API function SSL_free_buffers may cause memory to be accessed that was previously freed in some situations

Impact summary: A use after free can have a range of potential consequences such as the corruption of valid data, crashes or execution of arbitrary code. However, only applications that directly call the SSL_free_buffers function are affected by this issue. Applications that do not call this function are not vulnerable. Our investigations indicate that this function is rarely used by applications.

The SSL_free_buffers function is used to free the internal OpenSSL buffer used when processing an incoming record from the network. The call is only expected to succeed if the buffer is not currently in use. However, two scenarios have been identified where the buffer is freed even when still in use.

The first scenario occurs where a record header has been received from the network and processed by OpenSSL, but the full record body has not yet arrived. In this case calling SSL_free_buffers will succeed even though a record has only been partially processed and the buffer is still in use.

The second scenario occurs where a full record containing application data has been received and processed by OpenSSL but the application has only read part of this data. Again a call to SSL_free_buffers will succeed even though the buffer is still in use.

While these scenarios could occur accidentally during normal operation a malicious attacker could attempt to engineer a stituation where this occurs. We are not aware of this issue being actively exploited.

The FIPS modules in 3.3, 3.2, 3.1 and 3.0 are not affected by this issue.

Patch / fix

  • julia OpenSSL_jll 3.0.14+0
  • julia Openresty_jll 1.27.1+0
  • OpenSSL OpenSSL 1.1.1y, 3.0.14, 3.1.6, 3.2.2, 3.3.1
  • openssl Debian 12 3.0.14-1~deb12u1
  • openssl Debian 14, Debian 13 3.2.2-1

debian advisories DEBIAN-CVE-2024-4741

  • edk2 Ubuntu 22.04 LTS 2022.02-3ubuntu0.22.04.4
  • edk2 Ubuntu 24.04 LTS 2024.02-2ubuntu0.6
  • openssl Ubuntu 20.04 LTS 1.1.1f-1ubuntu2.23
  • openssl Ubuntu 22.04 LTS 3.0.2-0ubuntu1.17
  • openssl Ubuntu 24.04 LTS 3.0.13-0ubuntu3.2
  • openssl Ubuntu Pro FIPS-updates 22.04 LTS 3.0.2-0ubuntu1.17+Fips1
  • openssl-fips Ubuntu Pro FIPS-updates 24.04 LTS 3.0.13-0ubuntu3.6+Fips1

ubuntu advisories UBUNTU-CVE-2024-4741

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

  • openssl RHEL 8.8 TUS, RHEL 8.8 E4S, RHEL 8.6 EUS_LONG_LIFE +1 more 1:1.1.1k-16.el8_6
  • openssl-libs RHEL 8.8 TUS, RHEL 8.8 E4S, RHEL 8.6 EUS_LONG_LIFE +1 more 1:1.1.1k-16.el8_6
  • openssl-perl RHEL 8.8 TUS, RHEL 8.8 E4S, RHEL 8.6 EUS_LONG_LIFE +1 more 1:1.1.1k-16.el8_6
  • openssl RHEL 9 1:3.2.2-6.el9_5
  • openssl-libs RHEL 9 1:3.2.2-6.el9_5
  • openssl-perl RHEL 9 1:3.2.2-6.el9_5

red hat advisories RHSA-2026:26275RHSA-2024:9333

  • libpulp Linux Micro 6.0 0.3.5-1.1
  • openssl-3 Linux Micro 6.0 3.1.4-6.1
  • jitterentropy Linux Micro 6.0 3.4.1-3.1
  • openssl-1_1 SLES for SAP 15 SP4, SLES 15 SP4-LTSS, SLE Micro 5.4 +7 more 1.1.1l-150400.7.69.1
  • openssl-3 SLES for SAP 15 SP4, SLES 15 SP4-LTSS, SLE Micro 5.4 +7 more 3.0.8-150400.4.57.1
  • openssl-3 SLE Module for Basesystem 15 SP6, openSUSE Leap 15.6 3.1.4-150600.5.7.1
  • openssl-1_1 SLE Module for Legacy 15 SP6, SLE Module for Development Tools 15 SP6, SLE Module for Basesystem 15 SP6 +1 more 1.1.1w-150600.5.3.1
  • openssl-1_1 SLE Module for Basesystem 15 SP5, SLE Micro 5.5, openSUSE Leap 15.5 1.1.1l-150500.17.31.1

suse advisories SUSE-SU-2025:03632-1SUSE-SU-2025:03523-1SUSE-SU-2025:20014-1SUSE-SU-2024:2271-1SUSE-SU-2024:2197-1SUSE-SU-2024:2089-1

  • openssl-1_1 openSUSE Tumbleweed 1.1.1w-11.1
  • openssl-3 openSUSE Tumbleweed 3.1.4-11.1

opensuse advisories openSUSE-SU-2024:14219-1openSUSE-SU-2024:14220-1

  • openssl AlmaLinux 8 1:1.1.1k-16.el8_6
  • openssl-libs AlmaLinux 8 1:1.1.1k-16.el8_6
  • openssl-perl AlmaLinux 8 1:1.1.1k-16.el8_6
  • openssl AlmaLinux 9 1:3.2.2-6.el9_5
  • openssl-libs AlmaLinux 9 1:3.2.2-6.el9_5
  • openssl-perl AlmaLinux 9 1:3.2.2-6.el9_5

almalinux advisories ALSA-2026:26275ALSA-2024:9333

  • openssl Rocky Linux 8 1:1.1.1k-16.el8_10
  • openssl Rocky Linux 9 1:3.2.2-6.el9_5.1
  • openssl-fips-provider Rocky Linux 9 3.0.7-6.el9_5

rocky linux advisories RLSA-2026:26275RLSA-2024:9333

  • openssl Alpine 3.17 3.0.14-r0
  • openssl Alpine 3.19, Alpine 3.18 3.1.6-r0
  • openssl Alpine 3.24, Alpine 3.23, Alpine 3.22 +2 more 3.3.0-r3

alpine advisories ALPINE-CVE-2024-4741

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

  • openssl CBL-Mariner 2.0 1.1.1k-31
  • hvloader CBL-Mariner 2.0 1.0.1-6
  • edk2 Azure Linux 3.0 20240524git3e722403cd16-6

azure linux advisories AZL-42952AZL-52910AZL-52983

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

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-2024-4741 updated cvss 5.6

openssl: Use After Free with SSL_free_buffers

  • Red Hat Logging Subsystem for Red Hat OpenShift openshift-logging/fluentd-rhel8 Red Hat 3scale API Management Platform 2 3scale-amp2/backend-rhel8 Red Hat Enterprise Linux 9 compat-openssl11
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Enterprise Linux 10 edk2
    affected: workaround, no fix available
  • Red Hat JBoss Core Services jbcs-httpd24-openssl Red Hat JBoss Web Server 5 openssl
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Enterprise Linux AppStream (v. 9) openssl-perl 3.2.2-6.el9_5
    fixed: vendor fix RHSA-2024:9333
  • Red Hat Enterprise Linux BaseOS (v. 8) openssl 1.1.1k-16.el8_6, openssl-libs 1.1.1k-16.el8_6, openssl-perl 1.1.1k-16.el8_6
    fixed: vendor fix RHSA-2026:26275
  • Red Hat Enterprise Linux BaseOS (v. 9) openssl 3.2.2-6.el9_5, openssl-libs 3.2.2-6.el9_5
    fixed: vendor fix RHSA-2024:9333
  • Red Hat Enterprise Linux BaseOS E4S (v.8.8) openssl 1.1.1k-16.el8_6, openssl-libs 1.1.1k-16.el8_6, openssl-perl 1.1.1k-16.el8_6 Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6) openssl 1.1.1k-16.el8_6, openssl-libs 1.1.1k-16.el8_6, openssl-perl 1.1.1k-16.el8_6 Red Hat Enterprise Linux BaseOS TUS (v.8.8) openssl 1.1.1k-16.el8_6, openssl-libs 1.1.1k-16.el8_6, openssl-perl 1.1.1k-16.el8_6
    fixed: vendor fix RHSA-2026:26275
  • Red Hat Enterprise Linux 6 openssl, openssl-perl
    not affected: vulnerable code not present
show 4 more
  • Red Hat Enterprise Linux 7 ovmf, OVMF, AAVMF, openssl, openssl-libs, openssl-perl
    not affected: vulnerable code not in execute path
  • Red Hat Enterprise Linux 8 edk2, shim, shim-x64, edk2-ovmf, shim-aa64, shim-ia32, +6 more
    not affected: vulnerable code not present
  • Red Hat Enterprise Linux 9 edk2, shim, shim-x64, edk2-ovmf, shim-aa64, edk2-tools, +3 more
    not affected: vulnerable code not in execute path
  • Red Hat Enterprise Linux 10 shim, openssl Red Hat Enterprise Linux BaseOS (v. 9) openssl-fips-provider 3.0.7-6.el9_5, openssl-fips-provider-so 3.0.7-6.el9_5 Red Hat Satellite 6 python-pyOpenSSL, python3-pyOpenSSL, python3.12-pyOpenSSL
    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 ICSA-25-226-15 updated cvss 7.5

Siemens SINEC OS

  • Siemens RUGGEDCOM RST2428P (6GK6242-6PA00) < 3.1 Siemens SCALANCE XCM-/XRM-/XCH-/XRH-300 family < 3.1
    affected: fixed in V3.1 support.industry.siemens.com
  • Siemens SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family
    not affected

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

cisa ICSA-24-319-06 updated cvss 7.5

Siemens SCALANCE M-800 Family

  • Siemens RUGGEDCOM RM1224 LTE(4G) EU (6GK6108-4AM00-2BA2) <V8.2 Siemens RUGGEDCOM RM1224 LTE(4G) NAM (6GK6108-4AM00-2DA2) <V8.2 Siemens SCALANCE M804PB (6GK5804-0AP00-2AA2) <V8.2 Siemens SCALANCE M812-1 ADSL-Router (6GK5812-1AA00-2AA2) <V8.2 Siemens SCALANCE M812-1 ADSL-Router (6GK5812-1BA00-2AA2) <V8.2 Siemens SCALANCE M816-1 ADSL-Router (6GK5816-1AA00-2AA2) <V8.2
    +20 more products
    Siemens SCALANCE M816-1 ADSL-Router (6GK5816-1BA00-2AA2) <V8.2 Siemens SCALANCE M826-2 SHDSL-Router (6GK5826-2AB00-2AB2) <V8.2 Siemens SCALANCE M874-2 (6GK5874-2AA00-2AA2) <V8.2 Siemens SCALANCE M874-3 (6GK5874-3AA00-2AA2) <V8.2 Siemens SCALANCE M874-3 3G-Router (CN) (6GK5874-3AA00-2FA2) <V8.2 Siemens SCALANCE M876-3 (6GK5876-3AA02-2BA2) <V8.2 Siemens SCALANCE M876-3 (ROK) (6GK5876-3AA02-2EA2) <V8.2 Siemens SCALANCE M876-4 (6GK5876-4AA10-2BA2) <V8.2 Siemens SCALANCE M876-4 (EU) (6GK5876-4AA00-2BA2) <V8.2 Siemens SCALANCE M876-4 (NAM) (6GK5876-4AA00-2DA2) <V8.2 Siemens SCALANCE MUM853-1 (A1) (6GK5853-2EA10-2AA1) <V8.2 Siemens SCALANCE MUM853-1 (B1) (6GK5853-2EA10-2BA1) <V8.2 Siemens SCALANCE MUM853-1 (EU) (6GK5853-2EA00-2DA1) <V8.2 Siemens SCALANCE MUM856-1 (A1) (6GK5856-2EA10-3AA1) <V8.2 Siemens SCALANCE MUM856-1 (B1) (6GK5856-2EA10-3BA1) <V8.2 Siemens SCALANCE MUM856-1 (CN) (6GK5856-2EA00-3FA1) <V8.2 Siemens SCALANCE MUM856-1 (EU) (6GK5856-2EA00-3DA1) <V8.2 Siemens SCALANCE MUM856-1 (RoW) (6GK5856-2EA00-3AA1) <V8.2 Siemens SCALANCE S615 EEC LAN-Router (6GK5615-0AA01-2AA2) <V8.2 Siemens SCALANCE S615 LAN-Router (6GK5615-0AA00-2AA2) <V8.2
    affected: fixed in V8.2 support.industry.siemens.com

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

cisa ICSA-25-044-09 updated cvss 7.5

Siemens SCALANCE W700 IEEE 802.11ax

  • Siemens SCALANCE WAB762-1 (6GK5762-1AJ00-6AA0) <V3.0.0 Siemens SCALANCE WAM763-1 (6GK5763-1AL00-7DA0) <V3.0.0 Siemens SCALANCE WAM763-1 (ME) (6GK5763-1AL00-7DC0) <V3.0.0 Siemens SCALANCE WAM763-1 (US) (6GK5763-1AL00-7DB0) <V3.0.0 Siemens SCALANCE WAM766-1 (6GK5766-1GE00-7DA0) <V3.0.0 Siemens SCALANCE WAM766-1 (ME) (6GK5766-1GE00-7DC0) <V3.0.0
    +13 more products
    Siemens SCALANCE WAM766-1 (US) (6GK5766-1GE00-7DB0) <V3.0.0 Siemens SCALANCE WAM766-1 EEC (6GK5766-1GE00-7TA0) <V3.0.0 Siemens SCALANCE WAM766-1 EEC (ME) (6GK5766-1GE00-7TC0) <V3.0.0 Siemens SCALANCE WAM766-1 EEC (US) (6GK5766-1GE00-7TB0) <V3.0.0 Siemens SCALANCE WUB762-1 (6GK5762-1AJ00-1AA0) <V3.0.0 Siemens SCALANCE WUB762-1 iFeatures (6GK5762-1AJ00-2AA0) <V3.0.0 Siemens SCALANCE WUM763-1 (6GK5763-1AL00-3AA0) <V3.0.0 Siemens SCALANCE WUM763-1 (6GK5763-1AL00-3DA0) <V3.0.0 Siemens SCALANCE WUM763-1 (US) (6GK5763-1AL00-3AB0) <V3.0.0 Siemens SCALANCE WUM763-1 (US) (6GK5763-1AL00-3DB0) <V3.0.0 Siemens SCALANCE WUM766-1 (6GK5766-1GE00-3DA0) <V3.0.0 Siemens SCALANCE WUM766-1 (ME) (6GK5766-1GE00-3DC0) <V3.0.0 Siemens SCALANCE WUM766-1 (USA) (6GK5766-1GE00-3DB0) <V3.0.0
    affected: fixed in V3.0.0 support.industry.siemens.com

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
total
Assessed
2 d ago

Exploit prediction

2.93% chance of exploitation in the next 30 days, higher than 87% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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
julia OpenSSL_jll
<3.0.14+0
3.0.14+0
julia Openresty_jll
>=1.19.9+0, <1.27.1+0
1.27.1+0

Affected products

  • OpenSSL OpenSSL

Classification

Weakness
Technology feeds

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.