Linux Kernel up to 6.18.32/7.0.9 bpf adjust_reg_min_max_vals improper synchronization

CVSS Meta Temp Score
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CTI Interest Score
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6.5$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 6.18.32/7.0.9 and classified as critical. Affected by this vulnerability is the function adjust_reg_min_max_vals of the component bpf. Executing a manipulation can lead to improper synchronization. The identification of this vulnerability is CVE-2026-53092. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in Linux Kernel up to 6.18.32/7.0.9. This vulnerability affects the function adjust_reg_min_max_vals of the component bpf. The manipulation with an unknown input leads to a improper synchronization vulnerability. The CWE definition for the vulnerability is CWE-662. The product utilizes multiple threads or processes to allow temporary access to a shared resource that can only be exclusive to one process at a time, but it does not properly synchronize these actions, which might cause simultaneous accesses of this resource by multiple threads or processes. The impact remains unknown. CVE summarizes:

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.

The advisory is shared for download at git.kernel.org. This vulnerability was named CVE-2026-53092 since 06/09/2026. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 07/21/2026).

The vulnerability scanner Nessus provides a plugin with the ID 328503 (Amazon Linux 2023 : bpftool6.12, kernel6.12, kernel6.12-devel (ALAS2023-2026-1970)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.18.33 or 7.0.10 eliminates this vulnerability. Applying the patch d88e8e4a3b52bd5b2ff3eceba4b29d1b5506d066/cc86a8b0a1c54d2bccf6f68cf49b82dea91b84de/d7f14173c0d5866c3cae759dee560ad1bed10d2e is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (328503) and CERT Bund (WID-SEC-2026-2077). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

  • Debian Linux
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • Ubuntu Linux
  • SUSE Linux
  • SUSE openSUSE
  • Open Source Linux Kernel
  • RESF Rocky Linux
  • Oracle Linux

Productinfo

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Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.6
VulDB Meta Temp Score: 6.5

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.8
CNA Vector (Linux): 🔒

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Improper synchronization
CWE: CWE-662
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 328503
Nessus Name: Amazon Linux 2023 : bpftool6.12, kernel6.12, kernel6.12-devel (ALAS2023-2026-1970)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.18.33/7.0.10
Patch: d88e8e4a3b52bd5b2ff3eceba4b29d1b5506d066/cc86a8b0a1c54d2bccf6f68cf49b82dea91b84de/d7f14173c0d5866c3cae759dee560ad1bed10d2e

Timelineinfo

06/09/2026 CVE reserved
06/24/2026 +15 days Advisory disclosed
06/24/2026 +0 days VulDB entry created
07/21/2026 +27 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-53092 (🔒)
GCVE (CVE): GCVE-0-2026-53092
GCVE (VulDB): GCVE-100-373384
CERT Bund: WID-SEC-2026-2077 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 06/24/2026 21:03
Updated: 07/21/2026 16:54
Changes: 06/24/2026 21:03 (59), 06/28/2026 03:27 (7), 06/30/2026 03:10 (11), 07/19/2026 11:43 (1), 07/21/2026 16:54 (2)
Complete: 🔍
Cache ID: 216::103

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