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TI-2026-65425 Aliases CVE-2026-102560GHSA-9v45-6jmj-gmwr

Libsoup: libsoup: heap buffer overflow during outgoing permessage-deflate buffer growth

Priority MEDIUM 49CWE-125Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 8 fixed, 1 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat.

Summary

A flaw was found in libsoup. When the permessage-deflate WebSocket extension compresses a very large outgoing message, truncated size calculations used for GByteArray growth could wrap, causing zlib to write past the allocated buffer and resulting in a heap buffer overflow.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00521 44th percentileScored 2026-11-07
Fix Partial Red Hat: 6 advisoriesRed Hat: 8 fixed, 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Red HatRed Hat Enterprise Linux 10—3.6.5-3.el10_2.20Patch availableCNA
Red HatRed Hat Enterprise Linux 10.0 Extended Update Support—3.6.5-3.el10_0.19Patch availableCNA
Red HatRed Hat Enterprise Linux 9—2.72.0-16.el9_8.8Patch availableCNA
Red HatRed Hat Enterprise Linux 9.2 Update Services for SAP Solutions—2.72.0-8.el9_2.18Patch availableCNA
Red HatRed Hat Enterprise Linux 9.4 Update Services for SAP Solutions—2.72.0-8.el9_4.17Patch availableCNA
Red HatRed Hat Enterprise Linux 9.6 Extended Update Support—2.72.0-10.el9_6.14Patch availableCNA
Red HatRed Hat Enterprise Linux 6——No fix listedCNA
Red HatRed Hat Enterprise Linux 7——Not affectedCNA
Red HatRed Hat Enterprise Linux 8——Not affectedCNA
  • Red Hat Enterprise Linux 10 VendorRed Hat Affected — Fixed in 3.6.5-3.el10_2.20 Patch available CNA
  • Red Hat Enterprise Linux 10.0 Extended Update Support VendorRed Hat Affected — Fixed in 3.6.5-3.el10_0.19 Patch available CNA
  • Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in 2.72.0-16.el9_8.8 Patch available CNA
  • Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions VendorRed Hat Affected — Fixed in 2.72.0-8.el9_2.18 Patch available CNA
  • Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions VendorRed Hat Affected — Fixed in 2.72.0-8.el9_4.17 Patch available CNA
  • Red Hat Enterprise Linux 9.6 Extended Update Support VendorRed Hat Affected — Fixed in 2.72.0-10.el9_6.14 Patch available CNA
  • Red Hat Enterprise Linux 6 VendorRed Hat Affected — Fixed in — No fix listed CNA
  • Red Hat Enterprise Linux 7 VendorRed Hat Affected — Fixed in — Not affected CNA
  • Red Hat Enterprise Linux 8 VendorRed Hat Affected — Fixed in — Not affected CNA

CPE configurations NVD · 5

CPEVersionsRoleVendor
cpe:2.3:a:gnome:libsoup:*:*:*:*:*:*:*:*before 3.7.3VulnerableGNOME
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*8.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*9.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*10.0VulnerableRed Hat
  • cpe:2.3:a:gnome:libsoup:*:*:*:*:*:*:*:* Versions before 3.7.3 Vulnerable ·GNOME
  • cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Red Hat

Remediation

Red Hat 6 advisories

  • RHSA-2026:93583 Released 2026-11-02 · Red Hat rating Important
    libsoup3 security update
    • Red Hat Enterprise Linux AppStream EUS (v. 10.0) libsoup3-3.6.5-3.el10_0.19, libsoup3-devel-3.6.5-3.el10_0.19
    • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) libsoup3-doc-3.6.5-3.el10_0.19
  • RHSA-2026:93446 Released 2026-11-02 · Red Hat rating Important
    libsoup security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.6) libsoup-2.72.0-10.el9_6.14, libsoup-devel-2.72.0-10.el9_6.14
  • RHSA-2026:93447 Released 2026-11-02 · Red Hat rating Important
    libsoup security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.2) libsoup-2.72.0-8.el9_2.18, libsoup-devel-2.72.0-8.el9_2.18
Show 3 more Red Hat advisories
  • RHSA-2026:93445 Released 2026-11-02 · Red Hat rating Important
    libsoup security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.4) libsoup-2.72.0-8.el9_4.17, libsoup-devel-2.72.0-8.el9_4.17
  • RHSA-2026:83618 Released 2026-10-15 · Red Hat rating Important
    libsoup3 security update
    • Red Hat Enterprise Linux AppStream (v. 10) libsoup3-3.6.5-3.el10_2.20, libsoup3-devel-3.6.5-3.el10_2.20
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) libsoup3-doc-3.6.5-3.el10_2.20
  • RHSA-2026:83384 Released 2026-10-15 · Red Hat rating Important
    libsoup security update
    • Red Hat Enterprise Linux AppStream (v. 9) libsoup-2.72.0-16.el9_8.8, libsoup-devel-2.72.0-16.el9_8.8

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support and 7 more products — RHSA-2026:83618

    6 records Highest priority Priority MEDIUM 6 MEDIUM

    Other records, highest priority first

    • TI-2026-65424 Libsoup: libsoup: heap buffer overflow during websocket client-frame maskingPriority MEDIUM 44
    • TI-2026-65423 Libsoup: libsoup: heap buffer overflow during websocket receive-buffer growthPriority MEDIUM 44
    • TI-2026-65422 Libsoup: libsoup: heap buffer overflow during websocket message reassemblyPriority MEDIUM 44
    Show all 6 records → Advisory →
  • Advisory ·

    Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support and 7 more products — RHSA-2026:93583

    6 records Highest priority Priority MEDIUM 6 MEDIUM

    Other records, highest priority first

    • TI-2026-65424 Libsoup: libsoup: heap buffer overflow during websocket client-frame maskingPriority MEDIUM 44
    • TI-2026-65423 Libsoup: libsoup: heap buffer overflow during websocket receive-buffer growthPriority MEDIUM 44
    • TI-2026-65422 Libsoup: libsoup: heap buffer overflow during websocket message reassemblyPriority MEDIUM 44
    Show all 6 records → Advisory →
Show 4 more groups
  • Advisory ·

    Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support and 6 more products — RHSA-2026:83384

    5 records Highest priority Priority MEDIUM 5 MEDIUM

    Other records, highest priority first

    • TI-2026-65424 Libsoup: libsoup: heap buffer overflow during websocket client-frame maskingPriority MEDIUM 44
    • TI-2026-65423 Libsoup: libsoup: heap buffer overflow during websocket receive-buffer growthPriority MEDIUM 44
    • TI-2026-65422 Libsoup: libsoup: heap buffer overflow during websocket message reassemblyPriority MEDIUM 44
    Show all 5 records → Advisory →
  • Advisory ·

    Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support and 6 more products — RHSA-2026:93445

    5 records Highest priority Priority MEDIUM 5 MEDIUM

    Other records, highest priority first

    • TI-2026-65424 Libsoup: libsoup: heap buffer overflow during websocket client-frame maskingPriority MEDIUM 44
    • TI-2026-65423 Libsoup: libsoup: heap buffer overflow during websocket receive-buffer growthPriority MEDIUM 44
    • TI-2026-65422 Libsoup: libsoup: heap buffer overflow during websocket message reassemblyPriority MEDIUM 44
    Show all 5 records → Advisory →
  • Advisory ·

    Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support and 6 more products — RHSA-2026:93446

    5 records Highest priority Priority MEDIUM 5 MEDIUM

    Other records, highest priority first

    • TI-2026-65424 Libsoup: libsoup: heap buffer overflow during websocket client-frame maskingPriority MEDIUM 44
    • TI-2026-65423 Libsoup: libsoup: heap buffer overflow during websocket receive-buffer growthPriority MEDIUM 44
    • TI-2026-65422 Libsoup: libsoup: heap buffer overflow during websocket message reassemblyPriority MEDIUM 44
    Show all 5 records → Advisory →
  • Advisory ·

    Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support and 6 more products — RHSA-2026:93447

    5 records Highest priority Priority MEDIUM 5 MEDIUM

    Other records, highest priority first

    • TI-2026-65424 Libsoup: libsoup: heap buffer overflow during websocket client-frame maskingPriority MEDIUM 44
    • TI-2026-65423 Libsoup: libsoup: heap buffer overflow during websocket receive-buffer growthPriority MEDIUM 44
    • TI-2026-65422 Libsoup: libsoup: heap buffer overflow during websocket message reassemblyPriority MEDIUM 44
    Show all 5 records → Advisory →

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2026:83618
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2026:83384
Red Hat Enterprise Linux AppStream E4S (v.9.2)Fixed RHSA-2026:93447
Red Hat Enterprise Linux AppStream E4S (v.9.4)Fixed RHSA-2026:93445
Red Hat Enterprise Linux AppStream EUS (v. 10.0)Fixed RHSA-2026:93583
Red Hat Enterprise Linux AppStream EUS (v.9.6)Fixed RHSA-2026:93446
Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)Fixed RHSA-2026:83618
Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)Fixed RHSA-2026:93583
Not affected: 2 products
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-102560
  2. 2026-10-03 Alias added: GHSA-9v45-6jmj-gmwr
  3. 2026-10-15 Fix available: libsoup3@0:3.6.5-3.el10_2.20, libsoup@0:2.72.0-16.el9_8.8 · CNA
  4. 2026-10-15 2 new references · CNA
  5. 2026-10-16 Fix available: RHSA-2026:83384 · Red Hat
  6. 2026-10-16 Fix available: RHSA-2026:83618 · Red Hat
  7. 2026-10-16 Fix available: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) · Red Hat
  8. 2026-10-16 CVSS score added · NVD
  9. 2026-10-23 Affected versions changed · CNA
  10. 2026-10-23 Affected versions changed · Red Hat
  11. 2026-11-02 Fix available: libsoup@0:2.72.0-8.el9_2.18, libsoup@0:2.72.0-8.el9_4.17 · CNA
  12. 2026-11-02 2 new references · CNA
  13. 2026-11-02 Fix available: libsoup@0:2.72.0-10.el9_6.14 · CNA
  14. 2026-11-02 1 new reference · CNA
  15. 2026-11-02 Fix available: RHSA-2026:93445 · Red Hat
  16. 2026-11-02 Fix available: RHSA-2026:93447 · Red Hat
  17. 2026-11-02 Fix available: RHSA-2026:93446 · Red Hat
  18. 2026-11-02 Fix available: Red Hat Enterprise Linux AppStream E4S (v.9.2), Red Hat Enterprise Linux AppStream E4S (v.9.4), Red Hat Enterprise Linux AppStream EUS (v.9.6) · Red Hat
  19. 2026-11-02 Fix available: libsoup3@0:3.6.5-3.el10_0.19 · CNA
  20. 2026-11-02 1 new reference · CNA
  21. 2026-11-02 Fix available: RHSA-2026:93583 · Red Hat
  22. 2026-11-02 Fix available: Red Hat Enterprise Linux AppStream EUS (v. 10.0), Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) · Red Hat

References

Patch 1

Advisory 7

  • TI-2019-08259 Underflow in PHP-FPM can lead to RCE KEVCVSS 3.1CRITICAL 9.8
  • TI-2018-10530 Code injection in [UNKNOWN] RichFaces KEVCVSS 3.1CRITICAL 9.8
  • TI-2014-05975 GNU Bash through 4.3 bash43-025 processes trailing strings after certain malformed… KEVCVSS 3.1CRITICAL 9.8
  • TI-2014-05157 GNU Bash through 4.3 processes trailing strings after function definitions in the values… KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-23530 Sudo before 1.9.17p1 allows local users to obtain root access because /etc/nsswitch.conf… KEVCVSS 3.1CRITICAL 9.3
  • TI-2021-17490 mod_proxy SSRF KEVCVSS 3.1CRITICAL 9.0
See all 1955 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences