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PUBLISHED

CVE-2021-46905

net: hso: fix NULL-deref on disconnect regression

Reserved:2024-02-25
Published:2024-02-25
Updated:2024-04-04

Description

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().

Product status

Default status
unaffected

a462067d7c8e before 5871761c5f0f
affected

145c89c441d2 before 0c71d4c89559
affected

caf5ac93b3b5 before 24b699bea755
affected

92028d7a31e5 before 5c17cfe155d2
affected

4a2933c88399 before d7fad2ce15bd
affected

dc195928d7e4 before 90642ee9eb58
affected

388d05f70f1e before 0f000005da31
affected

8a12f8836145 before 41c44e1f3112
affected

8a12f8836145 before 2ad5692db728
affected

Default status
affected

5.12
affected

Any version before 5.12
unaffected

4.19.189
unaffected

5.4.115
unaffected

5.10.33
unaffected

5.11.17
unaffected

5.12.1
unaffected

5.13
unaffected

References

https://git.kernel.org/stable/c/5871761c5f0f20d6e98bf3b6bd7486d857589554

https://git.kernel.org/stable/c/0c71d4c89559f72cec2592d078681a843bce570e

https://git.kernel.org/stable/c/24b699bea7553fc0b98dad9d864befb6005ac7f1

https://git.kernel.org/stable/c/5c17cfe155d21954b4c7e2a78fa771cebcd86725

https://git.kernel.org/stable/c/d7fad2ce15bdbbd0fec3ebe999fd7cab2267f53e

https://git.kernel.org/stable/c/90642ee9eb581a13569b1c0bd57e85d962215273

https://git.kernel.org/stable/c/0f000005da31f6947f843ce6b3e3a960540c6e00

https://git.kernel.org/stable/c/41c44e1f3112d7265dae522c026399b2a42d19ef

https://git.kernel.org/stable/c/2ad5692db72874f02b9ad551d26345437ea4f7f3

cve.org CVE-2021-46905

nvd.nist.gov CVE-2021-46905

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