CVE-2026-90210bpf: Fix UAF in bpf_trampoline_multi_attach_free on update failure
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Sep 18, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from aef4dfa790b22d8052cfb78044eadbe03c876c39 before 65c3939656fd7848e9274faa07c26748b5bf049c; from aef4dfa790b22d8052cfb78044eadbe03c876c39 before 0253073fb7d79a2dd2eae9581ea16db2aef395a6 | CNA record |
References
- https://git.kernel.org/stable/c/65c3939656fd7848e9274faa07c26748b5bf049c
- https://git.kernel.org/stable/c/0253073fb7d79a2dd2eae9581ea16db2aef395a6
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.