Gstreamer1-plugins-ugly-free: gstreamer: out-of-bounds read in realmedia demuxer fileinfo metadata parser
Priority LOW 31CWE-125Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- Low · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.
Summary
A flaw was found in GStreamer's RealMedia demuxer in the gst-plugins-ugly package. When processing a RealMedia file containing a specially crafted FILEINFO metadata section, the demuxer parses variable-name and variable-value pairs using re_skip_pascal_string() without validating that offsets remain within the mapped buffer. Additionally, the element count controlling the parsing loop is read from attacker-controlled data without validation, which can cause an infinite loop. A crafted RealMedia file can cause the application to crash, hang, or potentially read limited adjacent memory contents.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00245 15th percentileScored 2026-11-07
Fix Fixed Red Hat: 4 advisories
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | — | 1.26.7-2.el10_2.1 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 10.0 Extended Update Support | — | 1.24.11-1.el10_0.2 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9 | — | 1.22.12-6.el9_8.1 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support | — | 1.22.12-4.el9_6.1 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 7 | — | — | Not affected | CNA |
| Red Hat | Red Hat Enterprise Linux 8 | — | — | Not affected | CNA |
- Red Hat Enterprise Linux 10 VendorRed Hat Affected — Fixed in 1.26.7-2.el10_2.1 Patch available CNA
- Red Hat Enterprise Linux 10.0 Extended Update Support VendorRed Hat Affected — Fixed in 1.24.11-1.el10_0.2 Patch available CNA
- Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in 1.22.12-6.el9_8.1 Patch available CNA
- Red Hat Enterprise Linux 9.6 Extended Update Support VendorRed Hat Affected — Fixed in 1.22.12-4.el9_6.1 Patch available 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 names CNA · 6
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:/o:redhat:enterprise_linux:10.2 | 10.2 | — | Red Hat |
| cpe:/o:redhat:enterprise_linux_eus:10.0 | 10.0 | — | Red Hat |
| cpe:/a:redhat:enterprise_linux:9::appstream | 9 | — | Red Hat |
| cpe:/a:redhat:rhel_eus:9.6::appstream | 9.6 | — | Red Hat |
| cpe:/o:redhat:rhel_els:7 | 7 | — | Red Hat |
| cpe:/a:redhat:enterprise_linux:8 | 8 | — | Red Hat |
- cpe:/o:redhat:enterprise_linux:10.2 Versions 10.2 — ·Red Hat
- cpe:/o:redhat:enterprise_linux_eus:10.0 Versions 10.0 — ·Red Hat
- cpe:/a:redhat:enterprise_linux:9::appstream Versions 9 — ·Red Hat
- cpe:/a:redhat:rhel_eus:9.6::appstream Versions 9.6 — ·Red Hat
- cpe:/o:redhat:rhel_els:7 Versions 7 — ·Red Hat
- cpe:/a:redhat:enterprise_linux:8 Versions 8 — ·Red Hat
Remediation
Red Hat 4 advisories
- RHSA-2026:50691 Released 2026-08-05 · Red Hat rating Moderategstreamer1-plugins-ugly-free security update
- Red Hat Enterprise Linux AppStream EUS (v.9.6) gstreamer1-plugins-ugly-free-1.22.12-4.el9_6.1
- RHSA-2026:50688 Released 2026-08-05 · Red Hat rating Moderategstreamer1-plugins-ugly-free security update
- Red Hat Enterprise Linux AppStream EUS (v. 10.0) gstreamer1-plugins-ugly-free-1.24.11-1.el10_0.2
- RHSA-2026:36674 Released 2026-07-08 · Red Hat rating Moderategstreamer1-plugins-ugly-free security update
- Red Hat Enterprise Linux AppStream (v. 9) gstreamer1-plugins-ugly-free-1.22.12-6.el9_8.1
Show 1 more Red Hat advisories
- RHSA-2026:36673 Released 2026-07-08 · Red Hat rating Moderategstreamer1-plugins-ugly-free security update
- Red Hat Enterprise Linux AppStream (v. 10) gstreamer1-plugins-ugly-free-1.26.7-2.el10_2.1
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 4 more products — RHSA-2026:36673
2 records Highest priority Priority LOW 2 LOW
Other records, highest priority first
- TI-2026-38726 Gstreamer1-plugins-ugly-free: gstreamer: out-of-bounds read in realmedia demuxer audio stream header parserPriority LOW 31
- Advisory ·
Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support and 4 more products — RHSA-2026:36674
2 records Highest priority Priority LOW 2 LOW
Other records, highest priority first
- TI-2026-38726 Gstreamer1-plugins-ugly-free: gstreamer: out-of-bounds read in realmedia demuxer audio stream header parserPriority LOW 31
Show 2 more groups
- Advisory ·
Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support and 4 more products — RHSA-2026:50688
2 records Highest priority Priority LOW 2 LOW
Other records, highest priority first
- TI-2026-38726 Gstreamer1-plugins-ugly-free: gstreamer: out-of-bounds read in realmedia demuxer audio stream header parserPriority LOW 31
- Advisory ·
Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support and 4 more products — RHSA-2026:50691
2 records Highest priority Priority LOW 2 LOW
Other records, highest priority first
- TI-2026-38726 Gstreamer1-plugins-ugly-free: gstreamer: out-of-bounds read in realmedia demuxer audio stream header parserPriority LOW 31
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux AppStream (v. 10) | Fixed | RHSA-2026:36673 |
| Red Hat Enterprise Linux AppStream (v. 9) | Fixed | RHSA-2026:36674 |
| Red Hat Enterprise Linux AppStream EUS (v. 10.0) | Fixed | RHSA-2026:50688 |
| Red Hat Enterprise Linux AppStream EUS (v.9.6) | Fixed | RHSA-2026:50691 |
Not affected: 2 products
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
Timeline
- 2026-10-02 Threatist record created from CVE-2026-53704
- 2026-10-03 Alias added: GHSA-j3jj-fwr8-4v9m
References
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Sources
- CVE-2026-53704 · CVE Program
- CVE-2026-53704 · NVD
- FIRST EPSS
- GHSA-j3jj-fwr8-4v9m · GitHub Advisory Database · CC BY 4.0
- CVE-2026-53704 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences