Description

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.

Affected products

VendorProductVersions
LinuxLinux98d7ca374ba4b39e7535613d40e159f09ca14da2 to <d88e8e4a3b52bd5b2ff3eceba4b29d1b5506d066; 98d7ca374ba4b39e7535613d40e159f09ca14da2 to <cc86a8b0a1c54d2bccf6f68cf49b82dea91b84de; 98d7ca374ba4b39e7535613d40e159f09ca14da2 to <d7f14173c0d5866c3cae759dee560ad1bed10d2e
LinuxLinux6.11; 0 to <6.11; 6.18.33 to <=6.18.*; 7.0.10 to <=7.0.*; 7.1 to <=*

References

Authoritative sources

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Generated from the official CVE List on 25 Jun 2026 10:14 UTC.