CVE-2026-53310

Analyzed Analyzed - Analysis Complete

Cross-Fabric Target Timeout Lookup Flaw in Linux Kernel

Publication date: 2026-06-26

Last updated on: 2026-07-06

Assigner: kernel.org

Description

In the Linux kernel, the following vulnerability has been resolved: soc/tegra: cbb: Fix cross-fabric target timeout lookup When a fabric receives an error interrupt, the error may have occurred on a different fabric. The target timeout lookup was using the wrong base address (cbb->regs) with offsets from a different fabric's target map, causing a kernel page fault. Unable to handle kernel paging request at virtual address ffff80000954cc00 pc : tegra234_cbb_get_tmo_slv+0xc/0x28 Call trace: tegra234_cbb_get_tmo_slv+0xc/0x28 print_err_notifier+0x6c0/0x7d0 tegra234_cbb_isr+0xe4/0x1b4 Add tegra234_cbb_get_fabric() to look up the correct fabric device using fab_id, and use its base address for accessing target timeout registers.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-06-26

Last Modified

2026-07-06

Generated

2026-07-17

AI Q&A

2026-06-26

EPSS Evaluated

2026-07-15

NVD

CVE-2026-53310

EUVD

EUVD-2026-39845

Affected Vendors & Products

Vendor	Product	Version / Range
linux	linux_kernel	From 6.19 (inc) to 7.0.10 (exc)
linux	linux_kernel	From 6.17 (inc) to 6.18.33 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-UNKNOWN

Attack-Flow Graph

Executive Summary

This vulnerability exists in the Linux kernel's soc/tegra component related to the cbb (Crossbar Bridge). When an error interrupt is received by a fabric, the error might have originated from a different fabric. However, the target timeout lookup was incorrectly using the base address of one fabric combined with offsets from another fabric's target map. This mismatch caused the kernel to attempt to access an invalid memory address, resulting in a kernel page fault.

The issue was fixed by adding a function to correctly identify the fabric device using its fabric ID and then using the correct base address for accessing the target timeout registers, preventing the kernel page fault.

Detection Guidance

This vulnerability involves a kernel page fault caused by incorrect target timeout lookup in the Tegra234 CBB fabric driver within the Linux kernel.

Detection would typically involve monitoring kernel logs for page faults or error interrupts related to the tegra234_cbb driver.

Check kernel logs for messages similar to "Unable to handle kernel paging request at virtual address ffff80000954cc00" or call traces involving tegra234_cbb_get_tmo_slv.
Use the command: dmesg | grep -i tegra234_cbb
Use journalctl -k | grep -i tegra234_cbb to review kernel logs for related errors.

Impact Analysis

This vulnerability can cause the Linux kernel to crash due to a page fault when handling error interrupts across different fabrics. Such crashes can lead to system instability, unexpected reboots, or denial of service conditions on affected systems.

Mitigation Strategies

The vulnerability has been resolved by adding a function to correctly look up the fabric device and use the proper base address for target timeout registers.

Immediate mitigation steps include updating the Linux kernel to a version that contains the fix for this issue.

Apply the latest kernel patches or upgrade to a kernel version released after 2026-06-26 that includes the fix for the tegra234_cbb driver.
If upgrading immediately is not possible, monitor kernel logs closely for related errors and consider limiting workloads that trigger fabric error interrupts.

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