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Debian Security Bug TrackerDEBIANCVE:CVE-2023-52837

HistoryMay 21, 2024 - 4:15 p.m.

CVE-2023-52837

2024-05-2116:15:21

Debian Security Bug Tracker

security-tracker.debian.org

linux kernel

vulnerability

fixed

nbd

uaf

nbd_open

disk

private data

6.7 Medium

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

15.5%

JSON

In the Linux kernel, the following vulnerability has been resolved: nbd: fix uaf in nbd_open Commit 4af5f2e03013 (“nbd: use blk_mq_alloc_disk and blk_cleanup_disk”) cleans up disk by blk_cleanup_disk() and it won’t set disk->private_data as NULL as before. UAF may be triggered in nbd_open() if someone tries to open nbd device right after nbd_put() since nbd has been free in nbd_dev_remove(). Fix this by implementing ->free_disk and free private data in it.

OSVersionArchitecturePackageVersionFilename
Debian12alllinux< 6.1.64-1linux_6.1.64-1_all.deb
Debian11alllinux< 5.10.218-1linux_5.10.218-1_all.deb
Debian999alllinux< 6.6.8-1linux_6.6.8-1_all.deb
Debian13alllinux< 6.6.8-1linux_6.6.8-1_all.deb

OS	Version	Architecture	Package	Version	Filename
Debian	12	all	linux	< 6.1.64-1	linux_6.1.64-1_all.deb
Debian	11	all	linux	< 5.10.218-1	linux_5.10.218-1_all.deb
Debian	999	all	linux	< 6.6.8-1	linux_6.6.8-1_all.deb
Debian	13	all	linux	< 6.6.8-1	linux_6.6.8-1_all.deb