uio: Fix use-after-free in uio_open (Linux Linux)

CVE-2023-52439
HIGH 7.8

En bref

Source
NVD
EPSS
EPSS 0.30 % · centile 23 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Modified

Description

In 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.

Faiblesses (CWE)

Références

Scores

VersionScoreVecteurÉvalué par
CVSS 3.1HIGH 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HLinux
CVSS 3.1HIGH 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HNVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary)
CVSS 3.1HIGH 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HNVD · nvd@nist.gov (Primary)

Références européennes

Avis du CERT-FR

Configurations affectées (CPE NVD)

Produits affectés

ProduitVersions
Linux · Linuxaffected 57c5f4df0a5a0ee83df799991251e2ee93a5e4e9 < 3174e0f7de1ba392dc191625da83df02d695b60c ; affected 57c5f4df0a5a0ee83df799991251e2ee93a5e4e9 < e93da893d52d82d57fc0db2ca566024e0f26ff50 ; affected 57c5f4df0a5a0ee83df799991251e2ee93a5e4e9 < 5e0be1229ae199ebb90b33102f74a0f22d152570 ; affected 57c5f4df0a5a0ee83df799991251e2ee93a5e4e9 < 5cf604ee538ed0c467abe3b4cda5308a6398f0f7 ; affected 57c5f4df0a5a0ee83df799991251e2ee93a5e4e9 < 17a8519cb359c3b483fb5c7367efa9a8a508bdea ; affected 57c5f4df0a5a0ee83df799991251e2ee93a5e4e9 < 35f102607054faafe78d2a6994b18d5d9d6e92ad
Linux · Linuxaffected 4.18 ; unaffected 0 < 4.18 ; unaffected 4.19.306 ≤ 4.19.* ; unaffected 5.4.268 ≤ 5.4.* ; unaffected 5.10.209 ≤ 5.10.* ; unaffected 5.15.148 ≤ 5.15.*

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD