Description
In the Linux kernel before 5.12.4, net/bluetooth/hci_event.c has a use-after-free when destroying an hci_chan, aka CID-5c4c8c954409. This leads to writing an arbitrary value.
Exploits (1)
nomisec
STUB
by Trinadh465 · poc
https://github.com/Trinadh465/device_renesas_kernel_AOSP10_r33_CVE-2021-33034
References (7)
Core 7
Core References
Exploit, Mailing List, Third Party Advisory x_refsource_misc
https://syzkaller.appspot.com/bug?id=2e1943a94647f7732dd6fc60368642d6e8dc91b1
Exploit, Third Party Advisory x_refsource_misc
https://sites.google.com/view/syzscope/kasan-use-after-free-read-in-hci_send_acl
Mailing List, Patch, Vendor Advisory x_refsource_misc
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5c4c8c9544099bb9043a10a5318130a943e32fc3
Mailing List, Patch, Vendor Advisory x_refsource_misc
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.4
Mailing List, Third Party Advisory vendor-advisory
x_refsource_fedora
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GI7Z7UBWBGD3ABNIL2DC7RQDCGA4UVQW/
Third Party Advisory mailing-list
x_refsource_mlist
https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html
Third Party Advisory mailing-list
x_refsource_mlist
https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html
Scores
CVSS v3
7.8
EPSS
0.0013
EPSS Percentile
32.8%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Details
CWE
CWE-416
Status
published
Products (3)
debian/debian_linux
9.0
fedoraproject/fedora
34
linux/linux_kernel
< 5.12.4
Published
May 14, 2021
Tracked Since
Feb 18, 2026