Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected aef4dfa790b22d8052cfb78044eadbe03c876c39 before 65c3939656fd7848e9274faa07c26748b5bf049c; affected aef4dfa790b22d8052cfb78044eadbe03c876c39 before 0253073fb7d79a2dd2eae9581ea16db2aef395a6 |
| Linux / Linux | affected 7.2; unaffected 0 before 7.2; unaffected 7.2.6 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.