CVEvulnerability
CVE-2021-33034
7.8 HIGH
Official page ↗
- Status
- Analyzed
- Published
- 2021-05-14
- Last modified
- 2026-08-13
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 7.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CVSS 2.0 ([email protected])
- 4.6 MEDIUM — AV:L/AC:L/Au:N/C:P/I:P/A:P
- Weaknesses
- CWE-416
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.
Affected configurations
• linux linux kernel (< 4.4.269)
• linux linux kernel (>= 4.5 < 4.9.269)
• linux linux kernel (>= 4.10 < 4.14.233)
• linux linux kernel (>= 4.15 < 4.19.191)
• linux linux kernel (>= 4.20 < 5.4.119)
• linux linux kernel (>= 5.5 < 5.10.37)
• linux linux kernel (>= 5.11 < 5.11.21)
• linux linux kernel (>= 5.12 < 5.12.4)
• fedoraproject fedora 34
• debian debian linux 9.0
Related
Weakness · CWE (1)
- CWE-416 Use After Free weakness
References
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.4 Mailing List, Patch, Vendor Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5c4c8c9544099bb9043a10a5318130a943e32fc3 Mailing List, Patch, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GI7Z7UBWBGD3ABNIL2DC7RQDCGA4UVQW/ Broken Link
- https://sites.google.com/view/syzscope/kasan-use-after-free-read-in-hci_send_acl Exploit, Third Party Advisory
- https://syzkaller.appspot.com/bug?id=2e1943a94647f7732dd6fc60368642d6e8dc91b1 Exploit, Mailing List, Third Party Advisory
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.4 Mailing List, Patch, Vendor Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5c4c8c9544099bb9043a10a5318130a943e32fc3 Mailing List, Patch, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GI7Z7UBWBGD3ABNIL2DC7RQDCGA4UVQW/ Broken Link
- https://sites.google.com/view/syzscope/kasan-use-after-free-read-in-hci_send_acl Exploit, Third Party Advisory
- https://syzkaller.appspot.com/bug?id=2e1943a94647f7732dd6fc60368642d6e8dc91b1 Exploit, Mailing List, Third Party Advisory