CVE-2026-52721 | Gstreamer1-plugins-bad-free: gstreamer: multiple out-of-bounds reads in pcapparse ipv4/tcp header parsing

Multiple out-of-bounds read vulnerabilities were found in GStreamer's pcapparse element. Malformed PCAP records can trigger reads beyond buffer boundaries during IPv4/TCP header parsing. This element is primarily used in debugging pipelines, limiting real-world exposure. A local attacker could trick a user into processing a specially crafted PCAP file, potentially leading to a crash or information disclosure.

Published: 2026-06-15 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Awaiting Analysis，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2026-52721 is rated Low Risk (21.7/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.11%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2026-52721

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-16 — 0.11% —

Full EPSS history (1 record total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-52721

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.3 3.1 MEDIUM
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.0 4.2 [email protected]

Weakness enumeration for CVE-2026-52721

GitHub Security Advisory for CVE-2026-52721

GHSA-9qf3-vv3w-6xw5 · Severity: medium — Multiple out-of-bounds read vulnerabilities were found in GStreamer's pcapparse element....

OS Trackers for CVE-2026-52721

vendor priority summary link
debian unimportant CVE-2026-52721 unimportant priority: Debian including 1 source packages (gst-plugins-bad1.0), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): open 5. https://security-tracker.debian.org/tracker/CVE-2026-52721
redhat medium — https://access.redhat.com/security/cve/CVE-2026-52721
suse medium CVE-2026-52721 severity moderate: SUSE including 24 source package names (gstreamer-plugins-bad, gstreamer-plugins-bad-chromaprint, …), 69 product×package rows across 6 product lines (SUSE Linux Enterprise Server 12 SP4-LTSS, SUSE Linux Enterprise Server 12 SP5-LTSS, … (6 product lines)): Known Not Affected 69. https://www.suse.com/security/cve/CVE-2026-52721/
ubuntu medium CVE-2026-52721 medium priority: Ubuntu including 1 source packages (gst-plugins-bad1.0), 8 status rows across 8 suites (bionic, focal, jammy, noble, questing, resolute, trusty, upstream): needs-triage 8. https://ubuntu.com/security/CVE-2026-52721

Affected software / configurations for CVE-2026-52721

Vendor Product Version Raw CPE
No affected products in dataset.

References for CVE-2026-52721

cvelogic Threat Intelligence