Answer in brief
CVE-2026-90210 records a High severity (CVSS 7.8) vulnerability in bpf: Fix UAF in bpf_trampoline_multi_attach_free on update failure. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=aef4dfa790b22d8052cfb78044eadbe03c876c39 <65c3939656fd7848e9274faa07c26748b5bf049c || >=aef4dfa790b22d8052cfb78044eadbe03c876c39 <0253073fb7d79a2dd2eae9581ea16db2aef395a6 | 65c3939656fd7848e9274faa07c26748b5bf049c, 0253073fb7d79a2dd2eae9581ea16db2aef395a6 |
| Linux/Linuxgeneric | 7.2 | Not reported |
Published upstream
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 17, 2026
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.
Quoted source text, attributed separately from HOL analysis.