CVE-2026-43256
Analyzed Analyzed - Analysis Complete
Out-of-Bounds Access in Linux Kernel Qualcomm CAMSS VFE

Publication date: 2026-05-06

Last updated on: 2026-05-11

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: media: qcom: camss: vfe: Fix out-of-bounds access in vfe_isr_reg_update() vfe_isr() iterates using MSM_VFE_IMAGE_MASTERS_NUM(7) as the loop bound and passes the index to vfe_isr_reg_update(). However, vfe->line[] array is defined with VFE_LINE_NUM_MAX(4): struct vfe_line line[VFE_LINE_NUM_MAX]; When index is 4, 5, 6, the access to vfe->line[line_id] exceeds the array bounds and resulting in out-of-bounds memory access. Fix this by using separate loops for output lines and write masters.
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Meta Information
Published
2026-05-06
Last Modified
2026-05-11
Generated
2026-06-16
AI Q&A
2026-05-06
EPSS Evaluated
2026-06-15
NVD
CVE-2026-43256
EUVD
EUVD-2026-27819
Affected Vendors & Products
Showing 5 associated CPEs
Vendor Product Version / Range
linux linux_kernel From 6.2 (inc) to 6.6.128 (exc)
linux linux_kernel From 6.7 (inc) to 6.12.75 (exc)
linux linux_kernel From 6.13 (inc) to 6.18.16 (exc)
linux linux_kernel From 6.19 (inc) to 6.19.6 (exc)
linux linux_kernel From 5.18 (inc) to 6.1.167 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-125 The product reads data past the end, or before the beginning, of the intended buffer.
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Executive Summary

This vulnerability exists in the Linux kernel's media component for Qualcomm cameras (qcom: camss: vfe). The issue is an out-of-bounds memory access in the function vfe_isr_reg_update(). Specifically, the function vfe_isr() loops using a bound of 7 (MSM_VFE_IMAGE_MASTERS_NUM), but accesses an array vfe->line[] that only has 4 elements (VFE_LINE_NUM_MAX). When the index is 4, 5, or 6, the code accesses memory beyond the array's limits, causing an out-of-bounds access.

The fix involved separating the loops for output lines and write masters to prevent accessing beyond the array bounds.

Impact Analysis

An out-of-bounds memory access vulnerability can lead to undefined behavior in the affected system. This may include system crashes, data corruption, or potential exploitation by attackers to execute arbitrary code or escalate privileges.

Since this vulnerability occurs in the Linux kernel's camera subsystem, it could impact devices using Qualcomm camera hardware, potentially affecting system stability or security.

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