CVE-2026-18649: Red Hat Enterprise Linux 10 · Unthrottled Resource Allocation
Affects Red Hat Enterprise Linux 10Source CVE Database V5
Not known to be exploited · CVSS 7.5 High.
Data as of 5 Nov 2026, 00:01 UTC
- EPSS
- 0.9% chance of exploitation in 30 days – higher than 61% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitation evidence
Disclosed: evidence found.
CVE published 6 Aug 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: evidence found.
Public exploit code: GitHub proofs of concept
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), GitHub proofs of concept, the Metasploit, Exploit-DB and nuclei-templates index as of 5 Nov 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Red Hat Enterprise Linux 10gstreamer1-plugins-good | Affected– | Fixed in– |
| Red Hat Enterprise Linux 10.0 Extended Update Supportgstreamer1-plugins-good | Affected– | Fixed in– |
| Red Hat Enterprise Linux 7 Extended Lifecycle Supportgstreamer1-plugins-good | Affected– | Fixed in– |
| Red Hat Enterprise Linux 8gstreamer1-plugins-good | Affected– | Fixed in– |
| Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Supportgstreamer1-plugins-good | Affected– | Fixed in– |
| Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-Ongstreamer1-plugins-good | Affected– | Fixed in– |
AI-suggested
A patch is available for Red Hat Enterprise Linux 9 as per Red Hat Advisory RHSA-2026:53452. Before patching, mitigations include: 1) Using SRTP or DTLS-SRTP to provide per-packet authentication and reject unauthenticated RTP fragments before they reach the vulnerable depayloaders; 2) Applying network-level restrictions (firewall rules) to allow RTP traffic only from trusted, authenticated sources; 3) Disabling the RTP plugin at build time with the "-Drtp=disabled" option; 4) Preventing auto-plugging of rtph264depay and rtph265depay elements by setting GST_PLUGIN_FEATURE_RANK=rtph264depay:0,rtph265depay:0. These mitigations reduce or eliminate the attack surface until an official fix is applied.
Description
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.
References
- access.redhat.com/security/cve/CVE-2026-18649 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2510614 (opens in a new tab)
- gitlab.freedesktop.org/gstreamer/gstreamer-security/-/merge_requests/113 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:53452 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:53451 (opens in a new tab)
- 0xsemizzz.vercel.app/blog/cve-2026-18649-gstreamer-rtp-dos/ (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:56966 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:61588 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:61943 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:65959 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:65999 (opens in a new tab)
- 0xsemizzz.vercel.app/projects/cve-2026-18649-gstreamer-rtp-dos/ (opens in a new tab)
- github.com/0xSemizzz/CVE-2026-18649 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:69232 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:70264 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:70584 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:70803 (opens in a new tab)