CVE-2021-42739
MEDIUMCVSS 6.7/10EPSS 0.44%
Last modified
CVE-2021-42739 is a medium-severity vulnerability rated 6.7/10 on the CVSS scale. The firewire subsystem in the Linux kernel through 5.14.13 has a buffer overflow related to drivers/media/firewire/firedtv-avc.c and drivers/media/firewire/firedtv-ci.c, because avc_ca_pmt mishandles bounds checking.. EPSS estimates a 0.44% chance of exploitation in the next 30 days.
Description
The firewire subsystem in the Linux kernel through 5.14.13 has a buffer overflow related to drivers/media/firewire/firedtv-avc.c and drivers/media/firewire/firedtv-ci.c, because avc_ca_pmt mishandles bounds checking.
Metrics
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Linux | Linux Kernel | <= 5.14.13 | — |
| Fedoraproject | Fedora | 33 | — |
| Fedoraproject | Fedora | 34 | — |
| Fedoraproject | Fedora | 35 | — |
| Debian | Debian Linux | 9.0 | — |
| Starwindsoftware | Starwind San \& Nas | v8r12 | — |
| Starwindsoftware | Starwind Virtual San | v8r13 | 14338 |
| Oracle | Communications Cloud Native Core Binding Support Function | 22.1.3 | — |
| Oracle | Communications Cloud Native Core Network Exposure Function | 22.1.1 | — |
| Oracle | Communications Cloud Native Core Policy | 22.2.0 | — |
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1951739Issue Tracking, Mitigation, Third Party Advisory
- https://www.oracle.com/security-alerts/cpujul2022.htmlPatch, Third Party Advisory
- https://www.starwindsoftware.com/security/sw-20220804-0001/Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1951739Issue Tracking, Mitigation, Third Party Advisory
- https://www.oracle.com/security-alerts/cpujul2022.htmlPatch, Third Party Advisory
- https://www.starwindsoftware.com/security/sw-20220804-0001/Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-42739?
The firewire subsystem in the Linux kernel through 5.14.13 has a buffer overflow related to drivers/media/firewire/firedtv-avc.c and drivers/media/firewire/firedtv-ci.c, because avc_ca_pmt mishandles bounds checking.
How severe is CVE-2021-42739?
CVE-2021-42739 has a CVSS score of 6.7/10 (MEDIUM severity). The EPSS model estimates a 0.44% probability of exploitation in the next 30 days.
How do I fix CVE-2021-42739?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2021-42739?
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Scan your code nowSource: NVD / NIST