Upstream information
Description
It is possible to cause an use-after-free write in SANM decoding with a carefully crafted animation using subversion <2.When a STOR chunk is present, a subsequent FOBJ chunk will be saved in ctx->stored_frame. Stored frames can later be referenced by FTCH chunks. For files using subversion < 2, the undecoded frame is stored, and decoded again when the FTCH chunks are parsed. However, in process_frame_obj if the frame has an invalid size, there's an early return, with a value of 0.
This causes the code in decode_frame to still store the raw frame buffer into ctx->stored_frame. Leaving ctx->has_dimensions set to false.
A subsequent chunk with type FTCH would call process_ftch and decode that frame obj again, adding to the top/left values and calling process_frame_obj again.
Given that we never set ctx->have_dimensions before, this time we set the dimensions, calling init_buffers, which can reallocate the buffer in ctx->stored_frame, freeing the previous one. However, the GetByteContext object gb still holds a reference to the old buffer.
Finally, when the code tries to decode the frame, codecs that accept a GetByteContext as a parameter will trigger a use-after-free read when using gb.
GetByteContext is only used for reading bytes, so at most one could read invalid data. There are no heap allocations between the free and when the object is accessed. However, upon returning to process_ftch, the code restores the original values for top/left in stored_frame, writing 4 bytes to the freed data at offset 6, potentially corrupting the allocator's metadata.
This issue can be triggered just by probing whether a file has the sanm format.
We recommend upgrading to version 8.0 or beyond.
SUSE information
Overall state of this security issue: Resolved
This issue is currently rated as having important severity.
| CVSS detail | SUSE |
|---|---|
| Base Score | 8 |
| Vector | CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| Attack Vector | Adjacent Network |
| Attack Complexity | Low |
| Privileges Required | None |
| User Interaction | Required |
| Scope | Unchanged |
| Confidentiality Impact | High |
| Integrity Impact | High |
| Availability Impact | High |
| CVSSv3 Version | 3.1 |
| CVSS detail | CNA (Google Inc) | SUSE |
|---|---|---|
| Base Score | 8.7 | 7.5 |
| Vector | CVSS:4.0/AV:A/AC:H/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X | CVSS:4.0/AV:A/AC:H/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N |
| Attack Vector | Adjacent Network | Adjacent Network |
| Attack Complexity | High | High |
| Attack Requirements | None | None |
| Privileges Required | None | None |
| User Interaction | Passive | Passive |
| Vulnerable System Confidentiality Impact | High | High |
| Vulnerable System Integrity Impact | High | High |
| Vulnerable System Availability Impact | None | High |
| Subsequent System Confidentiality Impact | High | None |
| Subsequent System Integrity Impact | High | None |
| Subsequent System Availability Impact | None | None |
| CVSSv4 Version | 4.0 | 4.0 |
Status of this issue by product and package
Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification. The updates are grouped by state of their lifecycle. SUSE product lifecycles are documented on the lifecycle page.
| Product(s) | Source package | State |
|---|---|---|
| Products under general support and receiving all security fixes. | ||
| SUSE Linux Enterprise Desktop 15 SP6 | ffmpeg | Not affected |
| SUSE Linux Enterprise Desktop 15 SP6 | ffmpeg-4 | Not affected |
| SUSE Linux Enterprise Desktop 15 SP7 | ffmpeg | Not affected |
| SUSE Linux Enterprise Desktop 15 SP7 | ffmpeg-4 | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP6 | ffmpeg | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP7 | ffmpeg | Not affected |
| SUSE Linux Enterprise Module for Desktop Applications 15 SP6 | ffmpeg | Not affected |
| SUSE Linux Enterprise Module for Desktop Applications 15 SP7 | ffmpeg | Not affected |
| SUSE Linux Enterprise Module for Package Hub 15 SP5 | ffmpeg | Not affected |
| SUSE Linux Enterprise Module for Package Hub 15 SP5 | ffmpeg-4 | Not affected |
| SUSE Linux Enterprise Module for Package Hub 15 SP6 | ffmpeg | Not affected |
| SUSE Linux Enterprise Module for Package Hub 15 SP6 | ffmpeg-4 | Not affected |
| SUSE Linux Enterprise Module for Package Hub 15 SP7 | ffmpeg | Not affected |
| SUSE Linux Enterprise Module for Package Hub 15 SP7 | ffmpeg-4 | Not affected |
| SUSE Linux Enterprise Server 15 SP6 | ffmpeg | Not affected |
| SUSE Linux Enterprise Server 15 SP6 | ffmpeg-4 | Not affected |
| SUSE Linux Enterprise Server 15 SP7 | ffmpeg | Not affected |
| SUSE Linux Enterprise Server 15 SP7 | ffmpeg-4 | Not affected |
| SUSE Linux Enterprise Server 16.0 | ffmpeg-7 | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | ffmpeg | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | ffmpeg-4 | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP7 | ffmpeg | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP7 | ffmpeg-4 | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 16.0 | ffmpeg-7 | Not affected |
| SUSE Linux Enterprise Workstation Extension 15 SP6 | ffmpeg | Not affected |
| SUSE Linux Enterprise Workstation Extension 15 SP6 | ffmpeg-4 | Not affected |
| SUSE Linux Enterprise Workstation Extension 15 SP7 | ffmpeg | Not affected |
| SUSE Linux Enterprise Workstation Extension 15 SP7 | ffmpeg-4 | Not affected |
| openSUSE Leap 15.6 | ffmpeg | Not affected |
| openSUSE Leap 15.6 | ffmpeg-4 | Not affected |
| Products under Long Term Service Pack support and receiving important and critical security fixes. | ||
| SUSE Linux Enterprise High Performance Computing 15 SP3 | ffmpeg | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3-ESPOS | ffmpeg | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS | ffmpeg | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4 | ffmpeg | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4 | ffmpeg-4 | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | ffmpeg | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | ffmpeg-4 | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5 | ffmpeg | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | ffmpeg | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | ffmpeg | Not affected |
| SUSE Linux Enterprise Module for Desktop Applications 15 SP3 | ffmpeg | Not affected |
| SUSE Linux Enterprise Module for Desktop Applications 15 SP4 | ffmpeg | Not affected |
| SUSE Linux Enterprise Module for Desktop Applications 15 SP4 | ffmpeg-4 | Not affected |
| SUSE Linux Enterprise Module for Desktop Applications 15 SP5 | ffmpeg | Not affected |
| SUSE Linux Enterprise Server 15 SP3 | ffmpeg | Not affected |
| SUSE Linux Enterprise Server 15 SP3-LTSS | ffmpeg | Not affected |
| SUSE Linux Enterprise Server 15 SP4 | ffmpeg | Not affected |
| SUSE Linux Enterprise Server 15 SP4 | ffmpeg-4 | Not affected |
| SUSE Linux Enterprise Server 15 SP4-LTSS | ffmpeg | Not affected |
| SUSE Linux Enterprise Server 15 SP4-LTSS | ffmpeg-4 | Not affected |
| SUSE Linux Enterprise Server 15 SP5 | ffmpeg | Not affected |
| SUSE Linux Enterprise Server 15 SP5 | ffmpeg-4 | Not affected |
| SUSE Linux Enterprise Server 15 SP5-LTSS | ffmpeg | Not affected |
| SUSE Manager Proxy 4.3 | ffmpeg | Not affected |
| SUSE Manager Proxy 4.3 | ffmpeg-4 | Not affected |
| SUSE Manager Retail Branch Server 4.3 | ffmpeg | Not affected |
| SUSE Manager Retail Branch Server 4.3 | ffmpeg-4 | Not affected |
| SUSE Manager Server 4.3 | ffmpeg | Not affected |
| SUSE Manager Server 4.3 | ffmpeg-4 | Not affected |
| Products past their end of life and not receiving proactive updates anymore. | ||
| SUSE CaaS Platform 4.0 | ffmpeg | Not affected |
| SUSE Enterprise Storage 6 | ffmpeg | Not affected |
| SUSE Enterprise Storage 7 | ffmpeg | Not affected |
| SUSE Enterprise Storage 7.1 | ffmpeg | Not affected |
| SUSE Linux Enterprise Desktop 15 | ffmpeg | Not affected |
| SUSE Linux Enterprise Desktop 15 SP1 | ffmpeg | Not affected |
| SUSE Linux Enterprise Desktop 15 SP2 | ffmpeg | Not affected |
| SUSE Linux Enterprise Desktop 15 SP3 | ffmpeg | Not affected |
| SUSE Linux Enterprise Desktop 15 SP4 | ffmpeg | Not affected |
| SUSE Linux Enterprise Desktop 15 SP4 | ffmpeg-4 | Not affected |
| SUSE Linux Enterprise Desktop 15 SP5 | ffmpeg | Not affected |
| SUSE Linux Enterprise Desktop 15 SP5 | ffmpeg-4 | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 | ffmpeg | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP1 | ffmpeg | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP1-ESPOS | ffmpeg | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP1-LTSS | ffmpeg | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2 | ffmpeg | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2-ESPOS | ffmpeg | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2-LTSS | ffmpeg | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | ffmpeg | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | ffmpeg-4 | Not affected |
| SUSE Linux Enterprise High Performance Computing 15-ESPOS | ffmpeg | Not affected |
| SUSE Linux Enterprise High Performance Computing 15-LTSS | ffmpeg | Not affected |
| SUSE Linux Enterprise Module for Desktop Applications 15 | ffmpeg | Not affected |
| SUSE Linux Enterprise Module for Desktop Applications 15 SP1 | ffmpeg | Not affected |
| SUSE Linux Enterprise Module for Desktop Applications 15 SP2 | ffmpeg | Not affected |
| SUSE Linux Enterprise Module for Package Hub 15 | ffmpeg | Not affected |
| SUSE Linux Enterprise Module for Package Hub 15 SP1 | ffmpeg | Not affected |
| SUSE Linux Enterprise Module for Package Hub 15 SP2 | ffmpeg | Not affected |
| SUSE Linux Enterprise Module for Package Hub 15 SP3 | ffmpeg | Not affected |
| SUSE Linux Enterprise Module for Package Hub 15 SP4 | ffmpeg | Not affected |
| SUSE Linux Enterprise Module for Package Hub 15 SP4 | ffmpeg-4 | Not affected |
| SUSE Linux Enterprise Real Time 15 SP2 | ffmpeg | Not affected |
| SUSE Linux Enterprise Real Time 15 SP3 | ffmpeg | Not affected |
| SUSE Linux Enterprise Real Time 15 SP4 | ffmpeg | Not affected |
| SUSE Linux Enterprise Real Time 15 SP4 | ffmpeg-4 | Not affected |
| SUSE Linux Enterprise Server 15 | ffmpeg | Not affected |
| SUSE Linux Enterprise Server 15 SP1 | ffmpeg | Not affected |
| SUSE Linux Enterprise Server 15 SP1-BCL | ffmpeg | Not affected |
| SUSE Linux Enterprise Server 15 SP1-LTSS | ffmpeg | Not affected |
| SUSE Linux Enterprise Server 15 SP2 | ffmpeg | Not affected |
| SUSE Linux Enterprise Server 15 SP2-BCL | ffmpeg | Not affected |
| SUSE Linux Enterprise Server 15 SP2-LTSS | ffmpeg | Not affected |
| SUSE Linux Enterprise Server 15 SP3-BCL | ffmpeg | Not affected |
| SUSE Linux Enterprise Server 15-LTSS | ffmpeg | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 | ffmpeg | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP1 | ffmpeg | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP2 | ffmpeg | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP3 | ffmpeg | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | ffmpeg | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | ffmpeg-4 | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | ffmpeg | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | ffmpeg-4 | Not affected |
| SUSE Linux Enterprise Workstation Extension 15 | ffmpeg | Not affected |
| SUSE Linux Enterprise Workstation Extension 15 SP1 | ffmpeg | Not affected |
| SUSE Linux Enterprise Workstation Extension 15 SP2 | ffmpeg | Not affected |
| SUSE Linux Enterprise Workstation Extension 15 SP3 | ffmpeg | Not affected |
| SUSE Linux Enterprise Workstation Extension 15 SP4 | ffmpeg | Not affected |
| SUSE Linux Enterprise Workstation Extension 15 SP4 | ffmpeg-4 | Not affected |
| SUSE Linux Enterprise Workstation Extension 15 SP5 | ffmpeg | Not affected |
| SUSE Linux Enterprise Workstation Extension 15 SP5 | ffmpeg-4 | Not affected |
| SUSE Manager Proxy 4.0 | ffmpeg | Not affected |
| SUSE Manager Proxy 4.1 | ffmpeg | Not affected |
| SUSE Manager Proxy 4.2 | ffmpeg | Not affected |
| SUSE Manager Retail Branch Server 4.0 | ffmpeg | Not affected |
| SUSE Manager Retail Branch Server 4.1 | ffmpeg | Not affected |
| SUSE Manager Retail Branch Server 4.2 | ffmpeg | Not affected |
| SUSE Manager Server 4.0 | ffmpeg | Not affected |
| SUSE Manager Server 4.1 | ffmpeg | Not affected |
| SUSE Manager Server 4.2 | ffmpeg | Not affected |
| openSUSE Leap 15.3 | ffmpeg | Not affected |
| openSUSE Leap 15.4 | ffmpeg | Not affected |
| openSUSE Leap 15.4 | ffmpeg-4 | Not affected |
| openSUSE Leap 15.5 | ffmpeg | Not affected |
| openSUSE Leap 15.5 | ffmpeg-4 | Not affected |
| Container Status | ||
| containers/open-webui:0 | ffmpeg-4 | Not affected |
SUSE Timeline for this CVE
CVE page created: Mon Oct 6 12:01:57 2025CVE page last modified: Thu Oct 9 18:36:04 2025