CVE-2021-42739

MEDIUM
Published Oct 20, 20214y ago · Modified Jun 17, 20262w ago
6.7 CVSS 3.1
Medium
Find Similar
Published Oct 20, 2021 4y ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
6.7
Exploitability
0.8
Impact
5.9
Vector string
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required High
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

No active exploitation signals — not in CISA KEV and no EPSS score yet.

Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-787 Out-of-bounds Write Memory Safety

Affected Products 10

VendorProductVersionRange
linuxlinux_kernel* ≤5.14.13
fedoraprojectfedora33any
fedoraprojectfedora34any
fedoraprojectfedora35any
debiandebian_linux9.0any
starwindsoftwarestarwind_san_\&_nasv8r12any
starwindsoftwarestarwind_virtual_sanv8r13any
oraclecommunications_cloud_native_core_binding_support_function22.1.3any
oraclecommunications_cloud_native_core_network_exposure_function22.1.1any
oraclecommunications_cloud_native_core_policy22.2.0any

References 6

  • bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=1951739
    Issue TrackingMitigationThird Party Advisory
  • git.kernel.org https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=35d2969ea3c7d32aee78066b1f3cf61a0d935a4e
  • lore.kernel.org https://lore.kernel.org/linux-media/YHaulytonFcW+lyZ%40mwanda/
  • seclists.org https://seclists.org/oss-sec/2021/q2/46
  • oracle.com https://www.oracle.com/security-alerts/cpujul2022.html
    PatchThird Party Advisory
  • starwindsoftware.com https://www.starwindsoftware.com/security/sw-20220804-0001/
    Third Party Advisory

Remediation

  • oracle.com https://www.oracle.com/security-alerts/cpujul2022.html
    PatchThird Party Advisory