CVE-2026-98007bpf: Reject non-scalar bpf_loop iteration counts
- —Not scoredno CVSS score yet
- 0.17%Exploitation in 30 daysEPSS · top 94% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: bpf: Reject non-scalar bpf_loop iteration counts bpf_loop() declares its nr_loops argument as ARG_ANYTHING. Privileged programs may pass pointer values to such arguments, so check_func_arg() lets a pointer-valued R1 reach the helper-specific checks. Since commit bb124da69c47 ("bpf: keep track of max number of bpf_loop callback iterations"), the verifier marks R1 precise and reads its upper bound to limit callback simulation. Precision backtracking only accepts scalar registers, so passing a pointer instead triggers the "backtracking misuse" verifier warning. Kernels with panic_on_warn enabled subsequently panic. Introduce ARG_SCALAR for helper arguments that only accept scalar values and use it for bpf_loop() nr_loops. Generic helper argument validation then rejects pointers before loop inlining and precision processing.
Timeline
ID reserved
By Linux
Published
- 24 days later
· 24 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.
- EPSS (exploitation in 30 days)
- 0.17% · top 94% of all CVEs (14 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected bfc5c19b4b48840627af0d0f1c8f4461b276e508 – < 2ff38b3552af53238aee6c877ae64cc798d46fce
- affected bb124da69c47dd98d69361ec13244ece50bec63e – < 656d40d1ca228ee21a9b3280432479fc9eae75ab
- affected bb124da69c47dd98d69361ec13244ece50bec63e – < e2e1161e03fecff6d2229a81b024337144bfcd97
- affected bb124da69c47dd98d69361ec13244ece50bec63e – < f8ae8275c721334ee50fafdd986fb83294eb941a
- affected bb124da69c47dd98d69361ec13244ece50bec63e – < c3fd8e5fd100f122bad503bdc0e9277219533253
- affected 6.6.15 – < 6.6.158
- affected 6.7
- unaffected < 6.7
- unaffected 6.6.158 – ≤ 6.6.*
- unaffected 6.12.111 – ≤ 6.12.*
- unaffected 6.18.53 – ≤ 6.18.*
- unaffected 7.2.7 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References5
- https://git.kernel.org/stable/c/2ff38b3552af53238aee6c877ae64cc798d46fce (opens in a new tab)
- https://git.kernel.org/stable/c/656d40d1ca228ee21a9b3280432479fc9eae75ab (opens in a new tab)
- https://git.kernel.org/stable/c/e2e1161e03fecff6d2229a81b024337144bfcd97 (opens in a new tab)
- https://git.kernel.org/stable/c/f8ae8275c721334ee50fafdd986fb83294eb941a (opens in a new tab)
- https://git.kernel.org/stable/c/c3fd8e5fd100f122bad503bdc0e9277219533253 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-86660 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-98007)Record last updated .