Resource exhaustion in Red Hat Enterprise Linux 10
CVE-2026-18649
A flaw was found in the GStreamer gst-plugins-good package. The rtph264depay and rtph265depay RTP depayloader elements do not enforce a maximum size limit on the reassembly buffer used during fragmented RTP packet processing. A remote, unauthenticated attacker can send a continuous stream of RTP fragments without ever transmitting an end-of-fragment marker, causing the reassembly buffer to grow without bound until process memory is exhausted. This results in a denial of service through process termination.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.010 (61.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 62nd percentile — 61.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000
Affected products
- Red Hat Enterprise Linux 10 — versions 0:1.26.7-2.el10_2.3
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9 — versions 0:1.22.12-7.el9_8.2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- access.redhat.com/security/cve/CVE-2026-18649 (vdb-entry)
- bugzilla.redhat.com/show_bug.cgi (issue-tracking)
- gitlab.freedesktop.org/gstreamer/gstreamer-security/-/merge_requests/113
- access.redhat.com/errata/RHSA-2026:53452 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:53451 (vendor-advisory)
- 0xsemizzz.vercel.app/blog/cve-2026-18649-gstreamer-rtp-dos/
- access.redhat.com/errata/RHSA-2026:56966 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:61588 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:61943 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:65959 (vendor-advisory)
Frequently asked questions
- What is CVE-2026-18649?
- CVE-2026-18649 is a high-severity vulnerability in Red Hat Enterprise Linux 10, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2026-08-06.
- How severe is CVE-2026-18649?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2026-18649 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.