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SafariWeb browser · Apple

CVE-2024-1580

HIGH · 8.8 CVSS v3.1 Published 2024-02-19
Fix available
A fix is available. Upgrade to 1.1.1 / 1.4.0 or later.
See remediation →
94/100
Remediation priority · Urgent
Remotely reachable Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
An integer overflow in dav1d AV1 decoder that can occur when decoding videos with large frame size. This can lead to memory corruption within the AV1 decoder. We recommend upgrading past version 1.4.0 of dav1d.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

Integer overflow vulnerability in the dav1d AV1 video decoder that occurs when processing videos with large frame sizes. The overflow leads to incorrect memory allocation sizes, resulting in heap-based memory corruption that could allow remote code execution or denial of service.

MitigationUpgrade dav1d library to version 1.4.0 or later to remediate this vulnerability. Validate all AV1 video input processing and implement bounds checking on frame dimension calculations as defense-in-depth.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
SafariWeb browser
Affected:< 17.4.1
FedoraOperating system
Affected:= 40
Dav1dApplication
Affected:< 1.4.0
IpadosOperating system
Affected:< 16.7.7>= 17.0, < 17.4.1
Iphone OsOperating system
Affected:< 16.7.7>= 17.0, < 17.4.1
macOSOperating system
Affected:>= 13.0, < 13.6.6>= 14.0, < 14.4.1
VisionosOperating system
Affected:< 1.1.1

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Check dav1d library version on Linux systems
    Run 'dav1d --version' or check the library file version with 'rpm -qa | grep dav1d' (Fedora) or 'dpkg -l | grep dav1d' (Debian-based)
    Affected if Installed version is less than 1.4.0
  2. Check Safari version on macOS
    Open Safari > Safari menu > About Safari, or run 'defaults read /Applications/Safari.app/Contents/Info CFBundleShortVersionString' in Terminal
    Affected if Safari version is below 17.4.1 on macOS 13.x-14.x
  3. Check macOS version for Safari compatibility
    Click Apple menu > About This Mac, or run 'sw_vers' in Terminal
    Affected if Running macOS 13.0-13.6.5 or 14.0-14.3 (Safari bundled with these versions is affected)
  4. Check iOS/iPadOS version
    Go to Settings > General > About, or check via Apple Configurator or MDM
    Affected if iOS or iPadOS version is 16.7.x or 17.0-17.4.0 (these versions contain affected dav1d)
  5. Verify AV1 video decoding capability is accessible
    Attempt to play an AV1 video file using the affected application (Safari, VLC with dav1d, or system decoder). Large frame size (4K+) AV1 files trigger the vulnerable code path.
    Affected if The application can decode AV1 videos and the file has frame dimensions that could trigger integer overflow (very large resolutions)

You are affected if your dav1d library is below 1.4.0, or if you run Safari on macOS < 13.6.6 / 14.4.1, or iOS/iPadOS < 16.7.7 / 17.0-17.4.1, AND you process AV1 video content with large frame sizes.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 1.1.1 / 1.4.0 / 13.6.6 or later
Fixed in 1.1.11.4.013.6.6
Interim mitigation

Upgrade dav1d library to version 1.4.0 or later to remediate this vulnerability. Validate all AV1 video input processing and implement bounds checking on frame dimension calculations as defense-in-depth.

Recommended fix High confidence

dav1d version 1.4.0 or later (or corresponding OS/browser updates: Safari 17.4.1+, macOS 13.6.6+, macOS 14.4.1+, iOS/iPadOS 16.7.7+, iOS/iPadOS 17.4.1+, visionOS 1.1.1+)

  1. Identify all systems or applications using the dav1d AV1 decoder library
  2. Check current installed version of dav1d (e.g., `dav1d --version` or via package manager)
  3. Update dav1d to version 1.4.0 or later using your system's package manager or by compiling from source
  4. For Fedora 40 users: Run `sudo dnf update dav1d` to install the patched version
  5. For macOS users: Ensure Safari is updated to 13.6.6 or later (for macOS 13.x) or 14.4.1 or later (for macOS 14.x)
  6. For iOS/iPadOS users: Update to iOS/iPadOS 16.7.7 or later, or 17.4.1 or later
  7. For visionOS users: Update to visionOS 1.1.1 or later
  8. Verify the installed version meets the minimum requirement of 1.4.0
Caveat Minor: Ensure any downstream applications are recompiled against the new library version if linking statically

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Safari Scoped from the published advisory
  • Consultation2.0 h
  • Implementation4.0 h
  • Testing6.0 h
  • Review / QA3.0 h
15.0 hours of engineering $2,560
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2024-1580 in production — separate from our analysis above.

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data