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NVD / CVE Program· CNA VulnCheck

CVE-2026-58049: FFmpeg - Out-of-Bounds Write in RASC Decoder decode_dlta()

Noroxi assessment

Priority: Monitor (action score 35/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.49% (FIRST EPSS).
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • According to CISA the attack is automatable: targets can be found by mass scanning.
  • Fixed version: ffmpeg (Debian:14) 7:9.0.2-1; ffmpeg-7 (openSUSE:Leap 16.0) 7.1.5-160000.1.1; ffmpeg-4 (openSUSE:Tumbleweed) 4.4.8-4.1.

Low priority for now. Upgrade to ffmpeg (Debian:14) 7:9.0.2-1; ffmpeg-7 (openSUSE:Leap 16.0) 7.1.5-160000.1.1; ffmpeg-4 (openSUSE:Tumbleweed) 4.4.8-4.1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

FFmpeg's RASC video decoder (decode_dlta in libavcodec/rasc.c) performs 32-bit reads and writes at the row cursor before the NEXT_LINE row-boundary check and validates the DLTA region in pixel rather than byte units, so a DLTA run on a PAL8 frame can access several bytes past the row allocation. A crafted media stream using the RASC FourCC, decoded by libavcodec, triggers a bitstream-controlled out-of-bounds heap write and adjacent out-of-bounds read, leading to memory corruption.

HighCVSS 8.8 · v4.0—No exploit Fix available
Published
Jun 27, 2026
Updated
Sep 1, 2026
EPSS
0.4% · 42th percentile

Report tools

JSON

Action score

35

Monitor

Low priority for now.

CVSS
35 / 40 · 8.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.4%

CISA SSVC decision

Exploitation
none
Automatable
yes
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · VulnCheck
8.6
NVD has not scored this yet; the score shown is the CNA’s.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-58049

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
enterprise linux ai3.0
enterprise linux ai3.2
enterprise linux ai3.3
enterprise linux ai3.5
openshift ai3.4
ai inference server3
enterprise linux ai3
openshift ai

Versions reported by the vendor

Affected version ranges reported by the assigning authority (VulnCheck). Independent of NVD's CPE analysis and usually ahead of it.

  • FFmpeg FFmpeg

    • up to and including bcd2c69e087a09b07cf45c6bd2428ee1ccb2925caffected · git

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12ffmpegfrom 0—
Debian:14ffmpegbefore 7:9.0.2-17:9.0.2-1
openSUSE:Leap 16.0ffmpeg-7before 7.1.5-160000.1.17.1.5-160000.1.1
openSUSE:Tumbleweedffmpeg-4before 4.4.8-4.14.4.8-4.1
openSUSE:Tumbleweedffmpeg-7before 7.1.5-2.17.1.5-2.1
openSUSE:Tumbleweedffmpeg-8before 8.1.2-3.18.1.2-3.1
openSUSE:Tumbleweedffmpeg-9before 9.0.1-2.19.0.1-2.1
Red Hat:enterprise_linux_ai:3.0::el9ffmpegbefore 0:6.1.6-9.el9ai0:6.1.6-9.el9ai
Red Hat:enterprise_linux_ai:3.0::el9ffmpeg-debuginfobefore 0:6.1.6-9.el9ai0:6.1.6-9.el9ai
Red Hat:enterprise_linux_ai:3.0::el9ffmpeg-debugsourcebefore 0:6.1.6-9.el9ai0:6.1.6-9.el9ai
Red Hat:enterprise_linux_ai:3.0::el9ffmpeg-free-rhaibefore 0:6.1.6-9.el9ai0:6.1.6-9.el9ai
Red Hat:enterprise_linux_ai:3.0::el9ffmpeg-free-rhai-debuginfobefore 0:6.1.6-9.el9ai0:6.1.6-9.el9ai
Red Hat:enterprise_linux_ai:3.0::el9ffmpeg-free-rhai-develbefore 0:6.1.6-9.el9ai0:6.1.6-9.el9ai
Red Hat:enterprise_linux_ai:3.0::el9libavcodec-free-rhaibefore 0:6.1.6-9.el9ai0:6.1.6-9.el9ai
Red Hat:enterprise_linux_ai:3.0::el9libavcodec-free-rhai-debuginfobefore 0:6.1.6-9.el9ai0:6.1.6-9.el9ai
Red Hat:enterprise_linux_ai:3.0::el9libavcodec-free-rhai-develbefore 0:6.1.6-9.el9ai0:6.1.6-9.el9ai
Red Hat:enterprise_linux_ai:3.0::el9libavdevice-free-rhaibefore 0:6.1.6-9.el9ai0:6.1.6-9.el9ai
Red Hat:enterprise_linux_ai:3.0::el9libavdevice-free-rhai-debuginfobefore 0:6.1.6-9.el9ai0:6.1.6-9.el9ai
Red Hat:enterprise_linux_ai:3.0::el9libavdevice-free-rhai-develbefore 0:6.1.6-9.el9ai0:6.1.6-9.el9ai
Red Hat:enterprise_linux_ai:3.0::el9libavfilter-free-rhaibefore 0:6.1.6-9.el9ai0:6.1.6-9.el9ai
Red Hat:enterprise_linux_ai:3.0::el9libavfilter-free-rhai-debuginfobefore 0:6.1.6-9.el9ai0:6.1.6-9.el9ai
Red Hat:enterprise_linux_ai:3.0::el9libavfilter-free-rhai-develbefore 0:6.1.6-9.el9ai0:6.1.6-9.el9ai
Red Hat:enterprise_linux_ai:3.0::el9libavformat-free-rhaibefore 0:6.1.6-9.el9ai0:6.1.6-9.el9ai
Red Hat:enterprise_linux_ai:3.0::el9libavformat-free-rhai-debuginfobefore 0:6.1.6-9.el9ai0:6.1.6-9.el9ai

+75

Same product

ffmpeg: all records

Other highest-scoring records for the same primary product.

  • CVE-2009-4637FFmpeg 0.5 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via unknown vectors that trigger
    45Plan
  • CVE-2016-10190Heap-based buffer overflow in libavformat/http.c in FFmpeg before 2.8.10, 3.0.x before 3.0.5, 3.1.x before 3.1.6, and 3.2.x before 3.2.2 all
    42Plan
  • CVE-2009-4634Multiple integer underflows in FFmpeg 0.5 allow remote attackers to cause a denial of service and possibly execute arbitrary code via a craf
    42Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-40962Apr 15, 2026 · FFmpeg before 8.1 has an integer overflow and resultant out-of-bounds write via CENC (Common Encryption) subsample data to libavformat/mov.c
    39Monitor
  • ← EarlierCVE-2026-8461Jun 18, 2026 · Heap out-of-bounds write via odd slice_height in FFmpeg MagicYUV decoder
    35Monitor
  • Later →CVE-2026-64830Jul 22, 2026 · FFmpeg 2.1 - 8.1.2 Heap Buffer Overflow via VobSub Subtitle Demuxer
    34Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
debian:ffmpeg7:9.0.2-1 · Debian:14Package registry (OSV)
opensuse:ffmpeg-44.4.8-4.1 · openSUSE:TumbleweedPackage registry (OSV)
opensuse:ffmpeg-77.1.5-2.1 · openSUSE:TumbleweedPackage registry (OSV)
opensuse:ffmpeg-88.1.2-3.1 · openSUSE:TumbleweedPackage registry (OSV)
opensuse:ffmpeg-99.0.1-2.1 · openSUSE:TumbleweedPackage registry (OSV)
red hat:ffmpeg0:6.1.6-1.el9ai · Red Hat:enterprise_linux_ai:3.5::el9Package registry (OSV)
red hat:ffmpeg-debuginfo0:6.1.6-1.el9ai · Red Hat:enterprise_linux_ai:3.5::el9Package registry (OSV)
red hat:ffmpeg-debugsource0:6.1.6-1.el9ai · Red Hat:enterprise_linux_ai:3.5::el9Package registry (OSV)
red hat:ffmpeg-free-rhai0:6.1.6-1.el9ai · Red Hat:enterprise_linux_ai:3.5::el9Package registry (OSV)
red hat:ffmpeg-free-rhai-debuginfo0:6.1.6-1.el9ai · Red Hat:enterprise_linux_ai:3.5::el9Package registry (OSV)
red hat:ffmpeg-free-rhai-devel0:6.1.6-1.el9ai · Red Hat:enterprise_linux_ai:3.5::el9Package registry (OSV)
red hat:libavcodec-free-rhai0:6.1.6-1.el9ai · Red Hat:enterprise_linux_ai:3.5::el9Package registry (OSV)
red hat:libavcodec-free-rhai-debuginfo0:6.1.6-1.el9ai · Red Hat:enterprise_linux_ai:3.5::el9Package registry (OSV)
red hat:libavcodec-free-rhai-devel0:6.1.6-1.el9ai · Red Hat:enterprise_linux_ai:3.5::el9Package registry (OSV)
red hat:libavdevice-free-rhai0:6.1.6-1.el9ai · Red Hat:enterprise_linux_ai:3.5::el9Package registry (OSV)
red hat:libavdevice-free-rhai-debuginfo0:6.1.6-1.el9ai · Red Hat:enterprise_linux_ai:3.5::el9Package registry (OSV)
red hat:libavdevice-free-rhai-devel0:6.1.6-1.el9ai · Red Hat:enterprise_linux_ai:3.5::el9Package registry (OSV)
suse:ffmpeg-44.4.8-150600.13.55.1 · SUSE:Linux Enterprise Module for Package Hub 15 SP7Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-84619 days apartHeap out-of-bounds write via odd slice_height in FFmpeg MagicYUV decoder
    35Monitor
  • CVE-2026-3075473 days apartA memory corruption vulnerability exists in FFmpeg before 8.1.
    35Monitor
  • CVE-2026-6483525 days apartFFmpeg 4.4 - 8.1.2 Out-of-Bounds Memory Access in ADX Audio Decoder
    34Monitor
  • CVE-2026-6570326 days apartFFmpeg 2.7 - 8.1.2 Out-of-Bounds Write in TDSC Video Decoder
    34Monitor
  • CVE-2026-7063240 days apartFFmpeg 4.4 < 9.0 Heap Out-of-Bounds Write in CFHD Decoder via AVI Demuxing
    34Monitor
  • CVE-2026-125244135 days apartFFmpeg before 8.1.3 and 9.x before 9.0.2 VVC Decoder Out-of-Bounds Write via sh_entry_points
    34Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
Integrity
Availability
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
X

Weakness class (CWE)

CWE-787 · Out-of-bounds Write

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/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

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (13 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records