CVE-2026-68240

Summary

In the Linux kernel, the following vulnerability has been resolved:

drm/gpusvm: publish dpagemap early to avoid device mapping leak on error

drm_gpusvm_get_pages() only stored the local dpagemap into svm_pages->dpagemap on the success path. If a later page failed (e.g. -EOPNOTSUPP when ctx->allow_mixed is false) and jumped to err_unmap, svm_pages->dpagemap was still NULL, so __drm_gpusvm_unmap_pages() skipped device_unmap() and leaked the device mappings already created.

Assign svm_pages->dpagemap when the first device page is mapped so the err_unmap path can device_unmap() those mappings.

This issue was found by Sashiko AI review.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxf70da6f99d4f40c5f481c92e3b65d5e36eaa6dc9 < e8362523fd1b61712f7d996802f9b5dee545c7e6affected
LinuxLinuxf70da6f99d4f40c5f481c92e3b65d5e36eaa6dc9 < 72e4fca5529e45b5beebad79d804de442f632324affected
LinuxLinuxf70da6f99d4f40c5f481c92e3b65d5e36eaa6dc9 < 7f708f51e3955bda0d77a0b67ab9bea6c97fea99affected
LinuxLinux6.18affected
LinuxLinux0 < 6.18unaffected
LinuxLinux6.18.44 <= 6.18.*unaffected
LinuxLinux7.1.6 <= 7.1.*unaffected
LinuxLinux7.2-rc4 <= *unaffected

Weaknesses

References