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Vulnerability record · CVE-2026-53329 · published 1 July 2026

CVE-2026-53329: Linux kernel vulnerability

Linux · Linux Kernel

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Use krealloc_array() in dal_vector_reserve() [Why & How] dal_vector_reserve() computes the allocation size as "capacity * vector->struct_size" using uint32_t arithmetic, which can silently wrap to a small value on overflow. This would cause krealloc to return a smaller buffer than expected, leading to heap overflows on subsequent vector appends. Replace krealloc() with krealloc_array() which performs an internal overflow check and returns NULL on wrap, preventing the issue. (cherry picked from commit 37668568641ccc4cc1dbca4923d0a16609dd5707)

7.0 CVSS 3.1 High EPSS 0.14% · top 97.1% CWE-674 · CWE-674
7.0CVSS 3.1 base score
0.14%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References
23 Jul 2026Last modified by NVD

Description

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Use krealloc_array() in dal_vector_reserve() [Why & How] dal_vector_reserve() computes the allocation size as "capacity * vector->struct_size" using uint32_t arithmetic, which can silently wrap to a small value on overflow. This would cause krealloc to return a smaller buffer than expected, leading to heap overflows on subsequent vector appends. Replace krealloc() with krealloc_array() which performs an internal overflow check and returns NULL on wrap, preventing the issue. (cherry picked from commit 37668568641ccc4cc1dbca4923d0a16609dd5707)

CVSS:3.1/AV:L/AC:H/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/201151e120f0062bcda21cad5d007b82725ad23b Patch
https://git.kernel.org/stable/c/31180638a33acad12c863132704a76536fb66211 Patch
https://git.kernel.org/stable/c/9540b0a4d13e4ede64ae1197d66a176d2149daa9 Patch
https://git.kernel.org/stable/c/a914aa802669e073f014dae2e5708633b5cecd34 Patch
https://git.kernel.org/stable/c/b15825deac1acff72638bbc8f05b89ceef8dfb13 Patch
https://git.kernel.org/stable/c/da48bc4461b8a5ebfb9264c9b191a701d8e99009 Patch
https://git.kernel.org/stable/c/de988c7a31f0774f07894cfe4802996f318e2870 Patch
https://git.kernel.org/stable/c/e09689286385a66311ac6922af95339d7a3cef8d Patch

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Source: NIST National Vulnerability Database (record CVE-2026-53329), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.