CVE-2026-45971bpf: Limit bpf program signature size
Updated under an hour ago ()
This data is behind schedule: last updated Oct 26, 2026, 6:40 AM ET. We are working on it.Behind: CVE records (cvelistV5).
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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: Limit bpf program signature size Practical BPF signatures are significantly smaller than KMALLOC_MAX_CACHE_SIZE Allowing larger sizes opens the door for abuse by passing excessive size values and forcing the kernel into expensive allocation paths (via kmalloc_large or vmalloc).
- CVSS
- 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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
- Analyzed
- Record last updated
- May 27, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | 349271568303695f0ac3563af153d2b4542f6986 builds before 5835a077c6f5c565d525eaca9fac01572b97a9b9; from 349271568303695f0ac3563af153d2b4542f6986 before eb8166c79097996396468a341de258a798789d36; from 349271568303695f0ac3563af153d2b4542f6986 before ea1535e28bb3773fc0b3cbd1f3842b808016990c | CNA record |
linux linux_kernel linux:linux_kernel | from 6.18 before 6.18.14; from 6.19 before 6.19.4 | NVD |
References
- https://git.kernel.org/stable/c/5835a077c6f5c565d525eaca9fac01572b97a9b9patch
- https://git.kernel.org/stable/c/eb8166c79097996396468a341de258a798789d36patch
- https://git.kernel.org/stable/c/ea1535e28bb3773fc0b3cbd1f3842b808016990cpatch
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.