uio: Fix use-after-free in uio_open

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Summary

CVECVE-2023-52439
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2024-02-20 21:15:08 UTC
Updated2026-08-04 10:18:27 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: uio: Fix use-after-free in uio_open core-1 core-2 ------------------------------------------------------- uio_unregister_device uio_open idev = idr_find() device_unregister(&idev->dev) put_device(&idev->dev) uio_device_release get_device(&idev->dev) kfree(idev) uio_free_minor(minor) uio_release put_device(&idev->dev) kfree(idev) ------------------------------------------------------- In the core-1 uio_unregister_device(), the device_unregister will kfree idev when the idev->dev kobject ref is 1. But after core-1 device_unregister, put_device and before doing kfree, the core-2 may get_device. Then: 1. After core-1 kfree idev, the core-2 will do use-after-free for idev. 2. When core-2 do uio_release and put_device, the idev will be double freed. To address this issue, we can get idev atomic & inc idev reference with minor_lock.

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

Problem Types: CWE-415

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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 57c5f4df0a5a0ee83df799991251e2ee93a5e4e9 3174e0f7de1ba392dc191625da83df02d695b60c git Not specified
CNA Linux Linux affected 57c5f4df0a5a0ee83df799991251e2ee93a5e4e9 e93da893d52d82d57fc0db2ca566024e0f26ff50 git Not specified
CNA Linux Linux affected 57c5f4df0a5a0ee83df799991251e2ee93a5e4e9 5e0be1229ae199ebb90b33102f74a0f22d152570 git Not specified
CNA Linux Linux affected 57c5f4df0a5a0ee83df799991251e2ee93a5e4e9 5cf604ee538ed0c467abe3b4cda5308a6398f0f7 git Not specified
CNA Linux Linux affected 57c5f4df0a5a0ee83df799991251e2ee93a5e4e9 17a8519cb359c3b483fb5c7367efa9a8a508bdea git Not specified
CNA Linux Linux affected 57c5f4df0a5a0ee83df799991251e2ee93a5e4e9 35f102607054faafe78d2a6994b18d5d9d6e92ad git Not specified
CNA Linux Linux affected 57c5f4df0a5a0ee83df799991251e2ee93a5e4e9 913205930da6213305616ac539447702eaa85e41 git Not specified
CNA Linux Linux affected 57c5f4df0a5a0ee83df799991251e2ee93a5e4e9 0c9ae0b8605078eafc3bea053cc78791e97ba2e2 git Not specified
CNA Linux Linux affected 13af019c87f2d90e663742cb1a819834048842ae git Not specified
CNA Linux Linux affected 4.14.100 4.15 semver Not specified
CNA Linux Linux affected 4.18 Not specified
CNA Linux Linux unaffected 4.18 semver Not specified
CNA Linux Linux unaffected 4.19.306 4.19.* semver Not specified
CNA Linux Linux unaffected 5.4.268 5.4.* semver Not specified
CNA Linux Linux unaffected 5.10.209 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.148 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.74 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.13 6.6.* semver Not specified
CNA Linux Linux unaffected 6.7.1 6.7.* semver Not specified
CNA Linux Linux unaffected 6.8 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/e93da893d52d82d57fc0db2ca566024e0f26ff50 af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
git.kernel.org/stable/c/5cf604ee538ed0c467abe3b4cda5308a6398f0f7 af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
git.kernel.org/stable/c/5e0be1229ae199ebb90b33102f74a0f22d152570 af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
git.kernel.org/stable/c/35f102607054faafe78d2a6994b18d5d9d6e92ad af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
lists.debian.org/debian-lts-announce/2024/06/msg00016.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org
git.kernel.org/stable/c/0c9ae0b8605078eafc3bea053cc78791e97ba2e2 af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
git.kernel.org/stable/c/3174e0f7de1ba392dc191625da83df02d695b60c af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
git.kernel.org/stable/c/17a8519cb359c3b483fb5c7367efa9a8a508bdea af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
lists.debian.org/debian-lts-announce/2024/06/msg00020.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org
git.kernel.org/stable/c/913205930da6213305616ac539447702eaa85e41 af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
security.netapp.com/advisory/ntap-20241227-0006 af854a3a-2127-422b-91ae-364da2661108 security.netapp.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 200182 Ubuntu Security Notification for Linux kernel (OEM) Vulnerabilities (USN-6688-1)
  • 200241 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-6726-1)
  • 200242 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-6724-1)
  • 200243 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-6725-1)
  • 674156 EulerOS Security Update for kernel (EulerOS-SA-2024-1509)
  • 674158 EulerOS Security Update for kernel (EulerOS-SA-2024-1488)
  • 755965 SUSE Enterprise Linux Security Update for the linux kernel (SUSE-SU-2024:0858-1)
  • 755966 SUSE Enterprise Linux Security Update for the linux kernel (SUSE-SU-2024:0857-1)
  • 756004 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2024:0926-1)
  • 756010 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2024:0977-1)

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