CVE-2026-59691 json
Gstreamer1-plugins-bad-free: gstreamer: rfbsrc/librfb hextile heap out-of-bounds write with 16bpp framebuffer
published 2026-07-09 4 mo ago modified 2026-11-04 4 d ago also EUVD-2026-42569
- cvss
- 7.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 25%
- public exploits
- 0
- none known
Summary
A heap buffer overflow vulnerability was found in GStreamer's rfbsrc plugin. When a client connects to a malicious RFB/VNC server that advertises a 16bpp framebuffer and sends Hextile-encoded updates, the Hextile background fill path writes 32-bit pixel values into a buffer allocated for 16-bit pixels. This type mismatch causes an out-of-bounds heap write that can lead to denial of service (process crash) and potential memory corruption.
Patch / fix
- Red Hat Red Hat Enterprise Linux 10 0:1.26.7-2.el10_2.6
- Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support 0:1.24.11-3.el10_0.6
- Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support 0:0.10.23-26.el7_9, 0:1.10.4-7.el7_9
- Red Hat Red Hat Enterprise Linux 8 0:1.16.1-9.el8_10.1
- Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 0:1.16.1-4.el8_4.4
- Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On 0:1.16.1-4.el8_4.4
- Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 0:1.16.1-4.el8_6.4
- Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On 0:1.16.1-4.el8_6.4
- Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service 0:1.16.1-4.el8_8.4
- Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions 0:1.16.1-4.el8_8.4
- Red Hat Red Hat Enterprise Linux 9 0:1.22.12-7.el9_8.3
- Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions 0:1.18.4-9.el9_2.5
- Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions 0:1.22.1-6.el9_4.6
- Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support 0:1.22.12-5.el9_6.6
- gst-plugins-bad1.0 Debian 12 1.22.0-4+deb12u8
- gst-plugins-bad1.0 Debian 14 1.28.5-1
debian advisories DEBIAN-CVE-2026-59691
- gstreamer1-plugins-bad-free RHEL 9 1.22.12-7.el9_8.3
- gstreamer1-plugins-bad-free-libs RHEL 9 1.22.12-7.el9_8.3
- gstreamer1-plugins-bad-free RHEL 8 1.16.1-9.el8_10.1
- gstreamer1-plugins-bad-free RHEL 10.2 1.26.7-2.el10_2.6
- gstreamer1-plugins-bad-free-libs RHEL 10.2 1.26.7-2.el10_2.6
- gstreamer-plugins-bad-free RHEL 7 ELS 0.10.23-26.el7_9
- gstreamer1-plugins-bad-free RHEL 9.2 E4S 1.18.4-9.el9_2.5
- gstreamer1-plugins-bad-free RHEL 8.4 EUS_LONG_LIFE, RHEL 8.4 AUS 1.16.1-4.el8_4.4
red hat advisories RHSA-2026:62532RHSA-2026:56658RHSA-2026:56772RHSA-2026:54752RHSA-2026:54665RHSA-2026:54664
- gstreamer1-plugins-bad-free AlmaLinux 8 1.16.1-9.el8_10.1
- gstreamer1-plugins-bad-free AlmaLinux 9 1.22.12-7.el9_8.3
- gstreamer1-plugins-bad-free-libs AlmaLinux 9 1.22.12-7.el9_8.3
- gstreamer1-plugins-bad-free AlmaLinux 10 1.26.7-2.el10_2.6
- gstreamer1-plugins-bad-free-libs AlmaLinux 10 1.26.7-2.el10_2.6
almalinux advisories ALSA-2026:47731ALSA-2026:47179ALSA-2026:47180
- gstreamer1-plugins-bad-free Rocky Linux 9 1.22.12-7.el9_8.3
- gstreamer1-plugins-bad-free Rocky Linux 8 1.16.1-9.el8_10.1
- gstreamer1-plugins-bad-free Rocky Linux 10 1.26.7-2.el10_2.6
rocky linux advisories RLSA-2026:47179RLSA-2026:47731RLSA-2026:47180
Vendor advisories
What the vendors themselves say about their products: affected, fixed or not affected, and what to do.
red hat product security vex CVE-2026-59691 updated cvss 7.1
gstreamer1-plugins-bad-free: gstreamer: rfbsrc/librfb Hextile heap out-of-bounds write with 16bpp framebuffer
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Red Hat Enterprise Linux 6 gstreamer-plugins-bad-free, gstreamer-plugins-bad-free-extrasaffected: workaround, no fix planned “Will not fix”
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Red Hat CodeReady Linux Builder EUS (v.9.6) gstreamer1-plugins-bad-free-devel 1.22.12-5.el9_6.6, gstreamer1-plugins-bad-free-debuginfo 1.22.12-5.el9_6.6, gstreamer1-plugins-bad-free-debugsource 1.22.12-5.el9_6.6, gstreamer1-plugins-bad-free-libs-debuginfo 1.22.12-5.el9_6.6fixed: vendor fix RHSA-2026:54660
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Red Hat Enterprise Linux AppStream (v. 8) gstreamer1-plugins-bad-free 1.16.1-9.el8_10.1fixed: vendor fix RHSA-2026:47731
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Red Hat Enterprise Linux AppStream (v. 9) gstreamer1-plugins-bad-free 1.22.12-7.el9_8.3, gstreamer1-plugins-bad-free-libs 1.22.12-7.el9_8.3fixed: vendor fix RHSA-2026:47179
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Red Hat Enterprise Linux AppStream (v. 10) gstreamer1-plugins-bad-free 1.26.7-2.el10_2.6, gstreamer1-plugins-bad-free-libs 1.26.7-2.el10_2.6fixed: vendor fix RHSA-2026:47180
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Red Hat Enterprise Linux AppStream AUS (v.8.4) gstreamer1-plugins-bad-free 1.16.1-4.el8_4.4fixed: vendor fix RHSA-2026:56772
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Red Hat Enterprise Linux AppStream AUS (v.8.6) gstreamer1-plugins-bad-free 1.16.1-4.el8_6.4fixed: vendor fix RHSA-2026:54665
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Red Hat Enterprise Linux AppStream E4S (v.8.8) gstreamer1-plugins-bad-free 1.16.1-4.el8_8.4fixed: vendor fix RHSA-2026:54664
show 12 moreshow fewer
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Red Hat Enterprise Linux AppStream E4S (v.9.2) gstreamer1-plugins-bad-free 1.18.4-9.el9_2.5fixed: vendor fix RHSA-2026:56658
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Red Hat Enterprise Linux AppStream E4S (v.9.4) gstreamer1-plugins-bad-free 1.22.1-6.el9_4.6fixed: vendor fix RHSA-2026:54658
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Red Hat Enterprise Linux AppStream EUS (v. 10.0) gstreamer1-plugins-bad-free 1.24.11-3.el10_0.6, gstreamer1-plugins-bad-free-libs 1.24.11-3.el10_0.6fixed: vendor fix RHSA-2026:54659
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Red Hat Enterprise Linux AppStream EUS (v.9.6) gstreamer1-plugins-bad-free 1.22.12-5.el9_6.6, gstreamer1-plugins-bad-free-libs 1.22.12-5.el9_6.6fixed: vendor fix RHSA-2026:54660
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Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) gstreamer1-plugins-bad-free 1.16.1-4.el8_4.4fixed: vendor fix RHSA-2026:56772
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Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6) gstreamer1-plugins-bad-free 1.16.1-4.el8_6.4fixed: vendor fix RHSA-2026:54665
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Red Hat Enterprise Linux AppStream TUS (v.8.8) gstreamer1-plugins-bad-free 1.16.1-4.el8_8.4fixed: vendor fix RHSA-2026:54664
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Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) gstreamer1-plugins-bad-free-devel 1.22.12-7.el9_8.3, gstreamer1-plugins-bad-free-debuginfo 1.22.12-7.el9_8.3, gstreamer1-plugins-bad-free-debugsource 1.22.12-7.el9_8.3, gstreamer1-plugins-bad-free-libs-debuginfo 1.22.12-7.el9_8.3fixed: vendor fix RHSA-2026:47179
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Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) gstreamer1-plugins-bad-free-devel 1.26.7-2.el10_2.6, gstreamer1-plugins-bad-free-debuginfo 1.26.7-2.el10_2.6, gstreamer1-plugins-bad-free-debugsource 1.26.7-2.el10_2.6, gstreamer1-plugins-bad-free-libs-debuginfo 1.26.7-2.el10_2.6fixed: vendor fix RHSA-2026:47180
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Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) gstreamer1-plugins-bad-free-devel 1.24.11-3.el10_0.6, gstreamer1-plugins-bad-free-debuginfo 1.24.11-3.el10_0.6, gstreamer1-plugins-bad-free-debugsource 1.24.11-3.el10_0.6, gstreamer1-plugins-bad-free-libs-debuginfo 1.24.11-3.el10_0.6fixed: vendor fix RHSA-2026:54659
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Red Hat Enterprise Linux CRB (v. 8) gstreamer1-plugins-bad-free-devel 1.16.1-9.el8_10.1, gstreamer1-plugins-bad-free-debuginfo 1.16.1-9.el8_10.1, gstreamer1-plugins-bad-free-debugsource 1.16.1-9.el8_10.1fixed: vendor fix RHSA-2026:47731
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Red Hat Enterprise Linux Server (v. 7 ELS) gstreamer1-plugins-bad-free 1.10.4-7.el7_9, gstreamer-plugins-bad-free 0.10.23-26.el7_9 Red Hat Enterprise Linux Server Optional (v. 7 ELS) gstreamer1-plugins-bad-free-gtk 1.10.4-7.el7_9fixed: vendor fix RHSA-2026:62532
Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 4 mo ago
Exploit prediction
0.33% chance of exploitation in the next 30 days, higher than 25% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H |
Affected products
- Red Hat Red Hat Enterprise Linux 10
- Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support
- Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support
- Red Hat Red Hat Enterprise Linux 8
- Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
- Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On
- Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
- Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On
- Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service
- Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
- Red Hat Red Hat Enterprise Linux 9
- Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions
- Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions
- Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support
- Red Hat Red Hat Enterprise Linux 6
Classification
- Weakness
-
- CWE-787 Out-of-bounds Write
References
- gitlab.freedesktop.org /gstreamer/gstreamer-security/-/merge_requests/100
-
access.redhat.com
/errata/RHSA-2026:47179
vendor-advisory
-
access.redhat.com
/errata/RHSA-2026:47180
vendor-advisory
-
access.redhat.com
/errata/RHSA-2026:47731
vendor-advisory
-
access.redhat.com
/errata/RHSA-2026:54658
vendor-advisory
-
access.redhat.com
/errata/RHSA-2026:54659
vendor-advisory
-
access.redhat.com
/errata/RHSA-2026:54660
vendor-advisory
-
access.redhat.com
/errata/RHSA-2026:54664
vendor-advisory
-
access.redhat.com
/errata/RHSA-2026:54665
vendor-advisory
-
access.redhat.com
/errata/RHSA-2026:54752
vendor-advisory
-
access.redhat.com
/errata/RHSA-2026:56658
vendor-advisory
-
access.redhat.com
/errata/RHSA-2026:56772
vendor-advisory
-
access.redhat.com
/errata/RHSA-2026:62532
vendor-advisory
-
access.redhat.com
/security/cve/CVE-2026-59691
vdb-entry
-
bugzilla.redhat.com
/show_bug.cgi?id=2497343
issue-tracking
- gitlab.freedesktop.org /gstreamer/gstreamer/-/work_items/5173
Sources
- CVE List CVE-2026-59691
- NVD CVE-2026-59691
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.