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Vulnerability record · CVE-2026-53092 · published 24 June 2026

CVE-2026-53092: Linux kernel vulnerability

Linux · Linux Kernel

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.

7.8 CVSS 3.1 High EPSS 0.13% · top 97.8% CWE-393 · CWE-393
7.8CVSS 3.1 base score
0.13%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
7References
23 Aug 2026Last modified by NVD

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:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/1509c1ae9185ec7103899967ed788b6eebab3fcc
https://git.kernel.org/stable/c/cc86a8b0a1c54d2bccf6f68cf49b82dea91b84de Patch
https://git.kernel.org/stable/c/d7f14173c0d5866c3cae759dee560ad1bed10d2e Patch
https://git.kernel.org/stable/c/d88e8e4a3b52bd5b2ff3eceba4b29d1b5506d066 Patch
https://access.redhat.com/security/cve/CVE-2026-53092 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2492362 Third Party Advisory
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53092.json Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2026-53092), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.