Out-of-bounds write in Linux kernel - CVE-2026-64483
Published: July 27, 2026
Vulnerability identifier: #VU139461
CSH Severity: Medium
CVSS v4: 5.2 [CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-64483
CWE-ID: CWE-787
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows an attacker with physical access to cause a denial of service or execute arbitrary code.
The vulnerability exists due to an out-of-bounds read and out-of-bounds write in isight_packet() when processing crafted FireWire isochronous packets from a device on the bus during normal capture. An attacker with physical access can provide a malicious device that reports an oversized sample count to cause a denial of service or execute arbitrary code.
Exploitation requires a malicious or faulty Apple iSight device connected on the FireWire bus.
Affected software
Linux kernel
How to mitigate CVE-2026-64483
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
External References
- https://git.kernel.org/stable/c/24423e0a9251d348c3f1fb0bb0e61b879e1e976c
- https://git.kernel.org/stable/c/29b9667982e4df2ed7744f86b1144f8bb58eb698
- https://git.kernel.org/stable/c/31a01b70bb90e3ef3147f308e2ea899e1d2485ca
- https://git.kernel.org/stable/c/31da82b9676c6b112e7c72c7529e6812b919742a
- https://git.kernel.org/stable/c/3ed2fa1ed8cc65f910b8bbc0be3cc366b30f8478
- https://git.kernel.org/stable/c/57e4d9043afc1eaddee8f50d11def6e65415d273
- https://git.kernel.org/stable/c/8e48a29813df8dd71503800b7acf69c12c035045
- https://git.kernel.org/stable/c/ebbffacda6733dcbcef601b5b523460f8d8b671e