CVE-2026-98007
CVE CVE-2026-98007EUVD EUVD-2026-86660Published 2026-09-25T10:23:32.000Z
What the advisory describes
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.
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Linux — Linux bb124da69c47dd98d69361ec13244ece50bec63e <e2e1161e03fecff6d2229a81b024337144bfcd97; bb124da69c47dd98d69361ec13244ece50bec63e <656d40d1ca228ee21a9b3280432479fc9eae75ab; patch: 6.18.53; patch: 0; bfc5c19b4b48840627af0d0f1c8f4461b276e508; patch: 7.2.7; 6.7; 6.6.15 <6.7; patch: 6.12.111; bb124da69c47dd98d69361ec13244ece50bec63e <f8ae8275c721334ee50fafdd986fb83294eb941a; patch: 7.3-rc2; bb124da69c47dd98d69361ec13244ece50bec63e <c3fd8e5fd100f122bad503bdc0e9277219533253
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Linux — Linux
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