Vulnerability Details : CVE-2021-46905
In the Linux kernel, the following vulnerability has been resolved:
net: hso: fix NULL-deref on disconnect regression
Commit 8a12f8836145 ("net: hso: fix null-ptr-deref during tty device
unregistration") fixed the racy minor allocation reported by syzbot, but
introduced an unconditional NULL-pointer dereference on every disconnect
instead.
Specifically, the serial device table must no longer be accessed after
the minor has been released by hso_serial_tty_unregister().
Vulnerability category: Memory Corruption
Products affected by CVE-2021-46905
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:5.12:-:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:5.12:rc1:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:5.12:rc2:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:5.12:rc3:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:5.12:rc4:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:5.12:rc5:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:5.12:rc6:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:5.12:rc7:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-46905
0.04%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 7 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-46905
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.5
|
MEDIUM | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
1.8
|
3.6
|
NIST | 2024-04-17 |
CWE ids for CVE-2021-46905
-
The product dereferences a pointer that it expects to be valid but is NULL.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-46905
-
https://git.kernel.org/stable/c/5c17cfe155d21954b4c7e2a78fa771cebcd86725
net: hso: fix NULL-deref on disconnect regression - kernel/git/stable/linux.git - Linux kernel stable treePatch
-
https://git.kernel.org/stable/c/0f000005da31f6947f843ce6b3e3a960540c6e00
net: hso: fix NULL-deref on disconnect regression - kernel/git/stable/linux.git - Linux kernel stable treePatch
-
https://git.kernel.org/stable/c/d7fad2ce15bdbbd0fec3ebe999fd7cab2267f53e
net: hso: fix NULL-deref on disconnect regression - kernel/git/stable/linux.git - Linux kernel stable treePatch
-
https://git.kernel.org/stable/c/90642ee9eb581a13569b1c0bd57e85d962215273
net: hso: fix NULL-deref on disconnect regression - kernel/git/stable/linux.git - Linux kernel stable treePatch
-
https://git.kernel.org/stable/c/0c71d4c89559f72cec2592d078681a843bce570e
net: hso: fix NULL-deref on disconnect regression - kernel/git/stable/linux.git - Linux kernel stable treePatch
-
https://git.kernel.org/stable/c/24b699bea7553fc0b98dad9d864befb6005ac7f1
net: hso: fix NULL-deref on disconnect regression - kernel/git/stable/linux.git - Linux kernel stable treePatch
-
https://git.kernel.org/stable/c/41c44e1f3112d7265dae522c026399b2a42d19ef
net: hso: fix NULL-deref on disconnect regression - kernel/git/stable/linux.git - Linux kernel stable treePatch
-
https://git.kernel.org/stable/c/2ad5692db72874f02b9ad551d26345437ea4f7f3
net: hso: fix NULL-deref on disconnect regression - kernel/git/stable/linux.git - Linux kernel stable treePatch
-
https://git.kernel.org/stable/c/5871761c5f0f20d6e98bf3b6bd7486d857589554
net: hso: fix NULL-deref on disconnect regression - kernel/git/stable/linux.git - Linux kernel stable treePatch
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