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NVD / CVE Program· CNA redhat

CVE-2025-2784: Libsoup: heap buffer over-read in `skip_insignificant_space` when sniffing content

Noroxi assessment

Priority: Monitor (action score 26/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.87% (FIRST EPSS); higher than 59.2% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: gitlab.gnome.org/GNOME/libsoup/ libsoup 3.6.5; azl3 libsoup 3.4.4-5 on Azure Linux 3.0 3.4.4-5; azl3 libsoup 3.4.4-6 on Azure Linux 3.0 3.4.4-5.

Low priority for now. Upgrade to gitlab.gnome.org/GNOME/libsoup/ libsoup 3.6.5; azl3 libsoup 3.4.4-5 on Azure Linux 3.0 3.4.4-5; azl3 libsoup 3.4.4-6 on Azure Linux 3.0 3.4.4-5 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

A flaw was found in libsoup. The package is vulnerable to a heap buffer over-read when sniffing content via the skip_insight_whitespace() function. Libsoup clients may read one byte out-of-bounds in response to a crafted HTTP response by an HTTP server.

MediumCVSS 6.5 · v3.1—No exploit Fix available
Published
Apr 3, 2025
Updated
Nov 5, 2026
EPSS
0.8% · 59th percentile

Report tools

JSON

Action score

26

Monitor

Low priority for now.

CVSS
26 / 40 · 6.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.8%

CISA SSVC decision

Exploitation
proof of concept
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
6.5
CNA · redhat
7.0
0.5 point gap

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2025-2784

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
gnomelibsoup
redhatcodeready linux builder
redhatcodeready linux builder for arm64
redhatcodeready linux builder for arm64 eus
redhatcodeready linux builder for ibm z systems
redhatcodeready linux builder for ibm z systems eus
redhatcodeready linux builder for power little endian
redhatcodeready linux builder for power little endian eus
redhatenterprise linux
redhatenterprise linux eus
redhatenterprise linux for arm 64
redhatenterprise linux for arm 64 eus

and 9 more

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • gnome libsoupbefore 3.6.5
  • redhat codeready linux builder10.0
  • redhat codeready linux builder for arm6410.0_aarch64
  • redhat codeready linux builder for arm64 eus10.0_aarch64
  • redhat codeready linux builder for ibm z systems10.0_s390x
  • redhat codeready linux builder for ibm z systems eus10.0_s390x
  • redhat codeready linux builder for power little endian10.0_ppc64le
  • redhat codeready linux builder for power little endian eus10.0_ppc64le
  • redhat enterprise linux10.0
  • redhat enterprise linux8.0
  • redhat enterprise linux9.0
  • redhat enterprise linux eus10.0
  • redhat enterprise linux eus8.8
  • redhat enterprise linux eus9.2
  • redhat enterprise linux eus9.4
  • redhat enterprise linux eus9.6
  • redhat enterprise linux for arm 6410.0_aarch64
  • redhat enterprise linux for arm 648.0_aarch64
  • redhat enterprise linux for arm 649.0_aarch64
  • redhat enterprise linux for arm 64 eus10.0_aarch64

Versions reported by the vendor

Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.

  • gitlab.gnome.org/GNOME/libsoup/ libsoup

    • before 3.6.5affected · semver

  • Red Hat Red Hat Enterprise Linux 10

    • 0:3.6.5-3.el10_0 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 6

    • all versionsunknown

  • Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support

    • 0:2.62.2-9.el7_9 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 8

    • 0:2.62.3-9.el8_10 and laternot affected · rpm
    • 0:2.62.3-9.el8_10 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support

    • 0:2.62.3-1.el8_2.5 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support

    • 0:2.62.3-2.el8_4.5 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support

    • 0:2.62.3-2.el8_6.5 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 8.6 Telecommunications Update Service

    • 0:2.62.3-2.el8_6.5 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions

    • 0:2.62.3-2.el8_6.5 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 8.8 Extended Update Support

    • 0:2.62.3-3.el8_8.5 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 9

    • 0:2.72.0-10.el9_6.2 and laternot affected · rpm

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
AlmaLinux:10libsoup3before 3.6.5-3.el10_03.6.5-3.el10_0
AlmaLinux:10libsoup3-develbefore 3.6.5-3.el10_03.6.5-3.el10_0
AlmaLinux:10libsoup3-docbefore 3.6.5-3.el10_03.6.5-3.el10_0
AlmaLinux:8libsoupbefore 2.62.3-9.el8_102.62.3-9.el8_10
AlmaLinux:8libsoup-develbefore 2.62.3-9.el8_102.62.3-9.el8_10
AlmaLinux:9libsoupbefore 2.72.0-10.el9_6.22.72.0-10.el9_6.2
AlmaLinux:9libsoup-develbefore 2.72.0-10.el9_6.22.72.0-10.el9_6.2
Debian:11libsoup2.4before 2.72.0-2+deb11u22.72.0-2+deb11u2
Debian:12libsoup2.4from 0—
Debian:12libsoup3before 3.2.3-0+deb12u13.2.3-0+deb12u1
Debian:13libsoup2.4before 2.74.3-102.74.3-10
Debian:13libsoup3before 3.6.5-13.6.5-1
openSUSE:Leap 15.6libsoupbefore 3.4.4-150600.3.7.13.4.4-150600.3.7.1
openSUSE:Leap 15.6libsoup2before 2.74.3-150600.4.6.12.74.3-150600.4.6.1
openSUSE:Tumbleweedlibsoup2before 2.74.3-8.12.74.3-8.1
Red Hat:enterprise_linux:10.0libsoup3before 0:3.6.5-3.el10_00:3.6.5-3.el10_0
Red Hat:enterprise_linux:10.0libsoup3-debuginfobefore 0:3.6.5-3.el10_00:3.6.5-3.el10_0
Red Hat:enterprise_linux:10.0libsoup3-debugsourcebefore 0:3.6.5-3.el10_00:3.6.5-3.el10_0
Red Hat:enterprise_linux:10.0libsoup3-develbefore 0:3.6.5-3.el10_00:3.6.5-3.el10_0
Red Hat:enterprise_linux:10.0libsoup3-docbefore 0:3.6.5-3.el10_00:3.6.5-3.el10_0
Red Hat:enterprise_linux:8::appstreamlibsoup-debuginfobefore 0:2.62.3-9.el8_100:2.62.3-9.el8_10
Red Hat:enterprise_linux:8::appstreamlibsoup-debugsourcebefore 0:2.62.3-9.el8_100:2.62.3-9.el8_10
Red Hat:enterprise_linux:8::appstreamlibsoup-develbefore 0:2.62.3-9.el8_100:2.62.3-9.el8_10
Red Hat:enterprise_linux:8::baseoslibsoupbefore 0:2.62.3-9.el8_100:2.62.3-9.el8_10

+48

Same product

gnome: all records

Other highest-scoring records for the same primary product.

  • CVE-2017-2885An exploitable stack based buffer overflow vulnerability exists in the GNOME libsoup 2.58.
    46Plan
  • CVE-2019-17266libsoup from versions 2.65.1 until 2.68.1 have a heap-based buffer over-read because soup_ntlm_parse_challenge() in soup-auth-ntlm.c does no
    40Plan
  • CVE-2018-12910The get_cookies function in soup-cookie-jar.c in libsoup 2.63.2 allows attackers to have unspecified impact via an empty hostname.
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2024-52531Nov 11, 2024 · GNOME libsoup before 3.6.1 allows a buffer overflow in applications that perform conversion to UTF-8 in soup_header_parse_param_list_strict.
    26Monitor
  • ← EarlierCVE-2024-52532Nov 11, 2024 · GNOME libsoup before 3.6.1 has an infinite loop, and memory consumption.
    30Monitor
  • Later →CVE-2025-12105Oct 23, 2025 · Libsoup: heap use-after-free in libsoup message queue handling during http/2 read completion
    30Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
gitlab.gnome.org/GNOME/libsoup/ libsoup3.6.5Vendor (CNA)
azl3 libsoup 3.4.4-5 on Azure Linux 3.03.4.4-5 · CBL-Mariner ReleasesMicrosoft (MSRC)
azl3 libsoup 3.4.4-6 on Azure Linux 3.03.4.4-5 · CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 libsoup 3.0.4-5 on CBL Mariner 2.03.0.4-5 · CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 libsoup 3.0.4-6 on CBL Mariner 2.03.0.4-5 · CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 libsoup 3.0.4-6 on CBL-Mariner 2.03.0.4-5 · CBL-Mariner ReleasesMicrosoft (MSRC)
almalinux:libsoup2.72.0-10.el9_6.2 · AlmaLinux:9Package registry (OSV)
almalinux:libsoup-devel2.72.0-10.el9_6.2 · AlmaLinux:9Package registry (OSV)
almalinux:libsoup33.6.5-3.el10_0 · AlmaLinux:10Package registry (OSV)
almalinux:libsoup3-devel3.6.5-3.el10_0 · AlmaLinux:10Package registry (OSV)
almalinux:libsoup3-doc3.6.5-3.el10_0 · AlmaLinux:10Package registry (OSV)
debian:libsoup2.42.74.3-10 · Debian:13Package registry (OSV)
debian:libsoup33.2.3-0+deb12u1 · Debian:12Package registry (OSV)
opensuse:libsoup3.4.4-150600.3.7.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:libsoup22.74.3-150600.4.6.1 · openSUSE:Leap 15.6Package registry (OSV)
red hat:libsoup0:2.62.2-9.el7_9 · Red Hat:rhel_els:7Package registry (OSV)
red hat:libsoup-debuginfo0:2.62.2-9.el7_9 · Red Hat:rhel_els:7Package registry (OSV)
red hat:libsoup-debugsource0:2.72.0-10.el9_6.2 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:libsoup-devel0:2.62.2-9.el7_9 · Red Hat:rhel_els:7Package registry (OSV)
red hat:libsoup30:3.6.5-3.el10_0 · Red Hat:enterprise_linux:10.0Package registry (OSV)
red hat:libsoup3-debuginfo0:3.6.5-3.el10_0 · Red Hat:enterprise_linux:10.0Package registry (OSV)
red hat:libsoup3-debugsource0:3.6.5-3.el10_0 · Red Hat:enterprise_linux:10.0Package registry (OSV)
red hat:libsoup3-devel0:3.6.5-3.el10_0 · Red Hat:enterprise_linux:10.0Package registry (OSV)
red hat:libsoup3-doc0:3.6.5-3.el10_0 · Red Hat:enterprise_linux:10.0Package registry (OSV)
rocky linux:libsoup0:2.72.0-10.el9_6.2 · Rocky Linux:9Package registry (OSV)
suse:libsoup3.4.4-150600.3.7.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP7Package registry (OSV)
suse:libsoup22.74.3-150600.4.6.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP7Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-66337477 days apartLibsoup: libsoup: heap buffer over-read via integer underflow in soup_filter_input_stream_read_until()
    26Monitor
  • CVE-2026-2443316 days apartLibsoup: out-of-bounds read in libsoup handle_partial_get() leading to heap information disclosure
    21Monitor
  • CVE-2026-12548474 days apartLibsoup: heap out-of-bounds read in libsoup due to integer truncation
    16Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
low · data can be read
Integrity
low · data or configuration can be modified
Availability
none
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
Low
Integrity impact
Low
Availability impact
None

Weakness class (CWE)

CWE-125 · Out-of-bounds Read

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (13 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records