CVE-2026-53092High· 7.8▾ Twilight

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…

▾ Twilight zone — High severity, or a signal on a lesser flaw

Depth score43/ 100 · Moderate

impact 42.9 · likelihood 0 · exploitation 0

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Proof of concept

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Published

Jun 24, 2026

Updated

Jul 6, 2026

CVSS

7.8

Vendor

Linux

Product

Linux

CWE

CWE-393

Depth score

43 · Moderate

EPSS

0.13% · p3

Platforms

—

Source

NVD

Vector

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

CISA SSVC

decided 2026-10-16

Exploitation: none
Automatable: no
Technical impact: total

Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.

EPSS history

Exploit-prediction probability, daily snapshots since Aug 5.

0.1% → 0.1%

Timeline

Disclosure to exploitation, from the record and what we observed since indexing it.

4 events · 61 days

Jun 24, 2026Published
Disclosed via NVD
Jul 6, 2026Record revised
Last analysed / modified upstream
Aug 5, 2026EPSS first tracked
0.1%
Aug 24, 2026EPSS peak
0.1% → 0.2%

Linux CWE-393 #nvd #cve.org

Affected

Linux >= 98d7ca374ba4b39e7535613d40e159f09ca14da2 < 1509c1ae9185ec7103899967ed788b6eebab3fcc
Linux >= 98d7ca374ba4b39e7535613d40e159f09ca14da2 < d88e8e4a3b52bd5b2ff3eceba4b29d1b5506d066
Linux >= 98d7ca374ba4b39e7535613d40e159f09ca14da2 < cc86a8b0a1c54d2bccf6f68cf49b82dea91b84de
Linux >= 98d7ca374ba4b39e7535613d40e159f09ca14da2 < d7f14173c0d5866c3cae759dee560ad1bed10d2e
Linux 6.11

Full technical detail▾

Overview

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.

Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

References

Related vulnerabilities

Connected by shared product, vendor, weakness, or advisory.

#nvd#cve.org