UBUNTU-CVE-2021-33034
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.
02 / AFFECTED SOFTWARE
Affected packages
6 explicit affected versions
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57 explicit affected versions
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27 explicit affected versions
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1 explicit affected versions
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14 explicit affected versions
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1 explicit affected versions
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1 explicit affected versions
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13 explicit affected versions
61 explicit affected versions
1 explicit affected versions
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10 explicit affected versions
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2 explicit affected versions
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2 explicit affected versions
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1 explicit affected versions
1 explicit affected versions
26 explicit affected versions
3 explicit affected versions
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1 explicit affected versions
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23 explicit affected versions
10 explicit affected versions
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16 explicit affected versions
14 explicit affected versions
38 explicit affected versions
9 explicit affected versions
112 explicit affected versions
19 explicit affected versions
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3 explicit affected versions
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54 explicit affected versions
2 explicit affected versions
13 explicit affected versions
45 explicit affected versions
19 explicit affected versions
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90 explicit affected versions
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22 explicit affected versions
4 explicit affected versions
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1 explicit affected versions
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50 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
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.
05 / REFERENCES
Further evidence
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.4
- https://git.kernel.org/linus/5c4c8c9544099bb9043a10a5318130a943e32fc3
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5c4c8c9544099bb9043a10a5318130a943e32fc3
- https://sites.google.com/view/syzscope/kasan-use-after-free-read-in-hci_send_acl
- https://syzkaller.appspot.com/bug?id=2e1943a94647f7732dd6fc60368642d6e8dc91b1
- https://ubuntu.com/security/CVE-2021-33034
- https://ubuntu.com/security/notices/USN-4997-1
- https://ubuntu.com/security/notices/USN-4997-2
- https://ubuntu.com/security/notices/USN-5000-1
- https://ubuntu.com/security/notices/USN-5000-2
- https://ubuntu.com/security/notices/USN-5001-1
- https://ubuntu.com/security/notices/USN-5016-1
- https://ubuntu.com/security/notices/USN-5018-1
- https://ubuntu.com/security/notices/USN-5299-1
- https://ubuntu.com/security/notices/USN-5343-1
- https://www.cve.org/CVERecord?id=CVE-2021-33034