CVE-2026-53092 (GCVE-0-2026-53092)
Vulnerability from cvelistv5
Published
2026-06-24 16:30
Modified
2026-08-23 12:45
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: bpf: Fix linked reg delta tracking when src_reg == dst_reg Consider the case of rX += rX where src_reg and dst_reg are pointers to the same bpf_reg_state in adjust_reg_min_max_vals(). The latter first modifies the dst_reg in-place, and later in the delta tracking, the subsequent is_reg_const(src_reg)/reg_const_value(src_reg) reads the post-{add,sub} value instead of the original source. This is problematic since it sets an incorrect delta, which sync_linked_regs() then propagates to linked registers, thus creating a verifier-vs-runtime mismatch. Fix it by just skipping this corner case.
References
Impacted products
Vendor Product Version
Linux Linux Version: 98d7ca374ba4b39e7535613d40e159f09ca14da2
Version: 98d7ca374ba4b39e7535613d40e159f09ca14da2
Version: 98d7ca374ba4b39e7535613d40e159f09ca14da2
Version: 98d7ca374ba4b39e7535613d40e159f09ca14da2
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