Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 6.11, < 6.18.33 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/cc86a8b0a1c54d2bccf6f68cf49b82dea91b84dePatch
- https://git.kernel.org/stable/c/d7f14173c0d5866c3cae759dee560ad1bed10d2ePatch
- https://git.kernel.org/stable/c/d88e8e4a3b52bd5b2ff3eceba4b29d1b5506d066Patch
- https://access.redhat.com/security/cve/CVE-2026-53092Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2492362Third Party Advisory
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53092.jsonThird Party Advisory
FAQ
What is CVE-2026-53092?
CVE-2026-53092 is a vulnerability with a CVSS score of 7.8 (HIGH). 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...
How severe is CVE-2026-53092?
CVE-2026-53092 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-53092?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.