media: hackrf: fix to not free memory after the device is registered in hackrf_probe()

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Summary

CVECVE-2026-31576
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-24 15:16:32 UTC
Updated2026-04-27 20:40:20 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: media: hackrf: fix to not free memory after the device is registered in hackrf_probe() In hackrf driver, the following race condition occurs: ``` CPU0 CPU1 hackrf_probe() kzalloc(); // alloc hackrf_dev .... v4l2_device_register(); .... fd = sys_open("/path/to/dev"); // open hackrf fd .... v4l2_device_unregister(); .... kfree(); // free hackrf_dev .... sys_ioctl(fd, ...); v4l2_ioctl(); video_is_registered() // UAF!! .... sys_close(fd); v4l2_release() // UAF!! hackrf_video_release() kfree(); // DFB!! ``` When a V4L2 or video device is unregistered, the device node is removed so new open() calls are blocked. However, file descriptors that are already open-and any in-flight I/O-do not terminate immediately; they remain valid until the last reference is dropped and the driver's release() is invoked. Therefore, freeing device memory on the error path after hackrf_probe() has registered dev it will lead to a race to use-after-free vuln, since those already-open handles haven't been released yet. And since release() free memory too, race to use-after-free and double-free vuln occur. To prevent this, if device is registered from probe(), it should be modified to free memory only through release() rather than calling kfree() directly.

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.000180000 probability, percentile 0.048130000 (date 2026-04-27)

Problem Types: CWE-416

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 8bc4a9ed85046c214458c9e82aea75d2f46cfffd 45cbaf5c7cdc5386d86377f0daf94a17a007fed0 git Not specified
CNA Linux Linux affected 8bc4a9ed85046c214458c9e82aea75d2f46cfffd 98a0a81ce78020c2522e0046f49d200de9778cb9 git Not specified
CNA Linux Linux affected 8bc4a9ed85046c214458c9e82aea75d2f46cfffd 07e9e674b6146b1f6fc41b1f54b8968bf2802824 git Not specified
CNA Linux Linux affected 8bc4a9ed85046c214458c9e82aea75d2f46cfffd 2145c71a8044362e82e9923f001ba2aeb771b848 git Not specified
CNA Linux Linux affected 8bc4a9ed85046c214458c9e82aea75d2f46cfffd fcd1d70792a35c8a97414fe429f48311e41269c2 git Not specified
CNA Linux Linux affected 8bc4a9ed85046c214458c9e82aea75d2f46cfffd 3b7da2b4d0fe014eff181ed37e3bf832eb8ed258 git Not specified
CNA Linux Linux affected 4.4 Not specified
CNA Linux Linux unaffected 4.4 semver Not specified
CNA Linux Linux unaffected 6.6.136 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.83 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.24 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19.14 6.19.* semver Not specified
CNA Linux Linux unaffected 7.0.1 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/98a0a81ce78020c2522e0046f49d200de9778cb9 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/2145c71a8044362e82e9923f001ba2aeb771b848 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/45cbaf5c7cdc5386d86377f0daf94a17a007fed0 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/07e9e674b6146b1f6fc41b1f54b8968bf2802824 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/fcd1d70792a35c8a97414fe429f48311e41269c2 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/3b7da2b4d0fe014eff181ed37e3bf832eb8ed258 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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