The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - bpf: Enforce regsafe base id consistency for BPF_ADD_CONST scalars When regsafe() compares two scalar     registers that both carry BPF_ADD_CONST, check_scalar_ids() maps their full compound id (aka base |     BPF_ADD_CONST flag) as one idmap entry. However, it never verifies that the underlying base ids, that is,     with the flag stripped are consistent with existing idmap mappings. This allows construction of two     verifier states where the old state has R3 = R2 + 10 (both sharing base id A) while the current state has     R3 = R4 + 10 (base id C, unrelated to R2). The idmap creates two independent entries: A->B (for R2) and     A|flag->C|flag (for R3), without catching that A->C conflicts with A->B. State pruning then incorrectly     succeeds. Fix this by additionally verifying base ID mapping consistency whenever BPF_ADD_CONST is set:
    after mapping the compound ids, also invoke check_ids() on the base IDs (flag bits stripped). This ensures     that if A was already mapped to B from comparing the source register, any ADD_CONST derivative must also     derive from B, not an unrelated C. (CVE-2026-53081)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Published	Updated	Severity
323381	Linux Distros Unpatched Vulnerability : CVE-2026-53081	Nessus	Misc.	6/28/2026	7/31/2026	medium
329305	openSUSE 16: cluster-md-kmp-64kb / cluster-md-kmp-azure / cluster-md-kmp-default / etc (openSUSE-SU-2026:21388-1)	Nessus	SuSE Local Security Checks	7/24/2026	7/27/2026	high
322020	Amazon Linux 2023 : bpftool6.18, kernel6.18, kernel6.18-devel (ALAS2023-2026-1866)	Nessus	Amazon Linux Local Security Checks	6/22/2026	7/31/2026	high
322107	Amazon Linux 2023 : bpftool6.12, kernel6.12, kernel6.12-devel (ALAS2023-2026-1894)	Nessus	Amazon Linux Local Security Checks	6/22/2026	7/31/2026	high

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