CVE-2026-90210
7.8
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: Fix UAF in bpf_trampoline_multi_attach_free on update failure
When bpf_trampoline_update() fails before modify_fentry_multi()/ unregister_fentry_multi() is called, cur_image is unchanged (cur_image == old_image) and ftrace still calls into it. Freeing old_image in that case causes a UAF.
Only free old_image when it differs from cur_image.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | aef4dfa790b22d8052cfb78044eadbe03c876c39 < 65c3939656fd7848e9274faa07c26748b5bf049c | affected |
| Linux | Linux | aef4dfa790b22d8052cfb78044eadbe03c876c39 < 0253073fb7d79a2dd2eae9581ea16db2aef395a6 | 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/65c3939656fd7848e9274faa07c26748b5bf049c
- https://git.kernel.org/stable/c/0253073fb7d79a2dd2eae9581ea16db2aef395a6
Feedback
Was this page helpful?
Glad to hear it! Please tell us how we can improve.
Sorry to hear that. Please tell us how we can improve.