Description
In the Linux kernel, the following vulnerability has been resolved: bpf: Fix tcx/netkit detach permissions when prog fd isn't given This commit fixes a security issue where BPF_PROG_DETACH on tcx or netkit devices could be executed by any user when no program fd was provided, bypassing permission checks. The fix adds a capability check for CAP_NET_ADMIN or CAP_SYS_ADMIN in this case.
Affected products
linux: linux kernel
References5
- git.kernel.org/stable/c/3f04cc1e5374da4c5e791ae010a06cfea7bacbe6 Patch
- git.kernel.org/stable/c/4e0772cded109c238411f2fac36ac39302758b81 Patch
- git.kernel.org/stable/c/ae23bc81ddf7c17b663c4ed1b21e35527b0a7131 Patch
- git.kernel.org/stable/c/0c249f523175963b0a746bba673ecebdf6cefd86
- git.kernel.org/stable/c/8e1623e7d61faf16cbadc80550da874303611ff5
Metrics
- CVSS 3.1
-
7.3
HIGH
Score source: CNA
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H - EPSS — exploit probability
- 0% percentile: 6 · as of 14 November 2026
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.