CVE-2026-93144bpf: Reject writes through untrusted BTF pointers
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: Reject writes through untrusted BTF pointers check_ptr_to_btf_access() lets program-type btf_struct_access callbacks validate writes before the default BTF access path rejects non-read accesses. That bypasses the read-only policy for untrusted BTF pointers created by helpers such as bpf_rdonly_cast(). Reject non-read accesses through PTR_UNTRUSTED BTF pointers at the common entry point, before the callback branch to handle all cases.
- 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
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 282de143ead96a5d53331e946f31c977b4610a74 before 644cf4e77c2770d4246f6d12f99bc80d253b0ec6; 282de143ead96a5d53331e946f31c977b4610a74 builds before 19d5566b84ca1af0256d0d0003e1a081580c3ba3; from 282de143ead96a5d53331e946f31c977b4610a74 before ac65c710cc643cbc52b899627577357867249530 | CNA record |
References
- https://git.kernel.org/stable/c/644cf4e77c2770d4246f6d12f99bc80d253b0ec6
- https://git.kernel.org/stable/c/19d5566b84ca1af0256d0d0003e1a081580c3ba3
- https://git.kernel.org/stable/c/ac65c710cc643cbc52b899627577357867249530
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.