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Vulnerability record · CVE-2026-45853 · published 27 May 2026

CVE-2026-45853: Linux kernel out-of-bounds write vulnerability

Linux · Linux Kernel

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: Use kvfree instead of kfree in amdgpu_gmc_get_nps_memranges() amdgpu_discovery_get_nps_info() internally allocates memory for ranges using kvcalloc(), which may use vmalloc() for large allocation. Using kfree() to release vmalloc memory will lead to a memory corruption. Use kvfree() to safely handle both kmalloc and vmalloc allocations. Compile tested only. Issue found using a prototype static analysis tool and code review.

7.8 CVSS 3.1 High EPSS 0.18% · top 93.8% CWE-787 · Out-of-bounds write
7.8CVSS 3.1 base score
0.18%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
25 Jun 2026Last modified by NVD

Description

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: Use kvfree instead of kfree in amdgpu_gmc_get_nps_memranges() amdgpu_discovery_get_nps_info() internally allocates memory for ranges using kvcalloc(), which may use vmalloc() for large allocation. Using kfree() to release vmalloc memory will lead to a memory corruption. Use kvfree() to safely handle both kmalloc and vmalloc allocations. Compile tested only. Issue found using a prototype static analysis tool and code review.

CVSS:3.1/AV:L/AC:L/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/0c44d61945c4a80775292d96460aa2f22e62f86c Patch
https://git.kernel.org/stable/c/16e7e7ad8cdc6b4c4af7f31e262f1494c1b2a55e Patch
https://git.kernel.org/stable/c/9ae85b0c1909b6c6bfd2636b04cdaf7f520bf2b5 Patch
https://git.kernel.org/stable/c/f441538893eba6347b983f2904819ca6c99da65e Patch

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Source: NIST National Vulnerability Database (record CVE-2026-45853), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.