CVE-2026-93111
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved:
bpf: Mark tracing_multi trampolines as ftrace managed
Since tracing_multi link does not set ftrace_managed, it would fail to release the tracing_multi link when attaching tracing_multi link and then attaching fentry link.
[ 3.714215] WARNING: kernel/bpf/trampoline.c:1727 at bpf_trampoline_multi_detach+0x20b/0x240, CPU#1: test_progs/97 … [ 3.733170] bpf_tracing_multi_link_release+0x14/0x30 [ 3.733890] bpf_link_free+0x58/0x130 [ 3.734414] bpf_link_release+0x23/0x30
Fix it by setting 'ftrace_managed = true' in register_fentry_multi().
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | aef4dfa790b22d8052cfb78044eadbe03c876c39 < 280145253fd38fa975cc04963ddaf74c7f415011 | affected |
| Linux | Linux | aef4dfa790b22d8052cfb78044eadbe03c876c39 < 30bdd6d1384d894931f113eb595636092d8e650c | affected |
| Linux | Linux | 7.2 | affected |
| Linux | Linux | 0 < 7.2 | unaffected |
| Linux | Linux | 7.2.6 <= 7.2.* | unaffected |
| Linux | Linux | 7.3-rc1 <= * | unaffected |
Weaknesses
References
- https://git.kernel.org/stable/c/280145253fd38fa975cc04963ddaf74c7f415011
- https://git.kernel.org/stable/c/30bdd6d1384d894931f113eb595636092d8e650c
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