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…
Does this matter?
Lower severity and a low EPSS score (0.26%). Track it; it rarely justifies an emergency change on its own.
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().
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.26% probability · 18th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-476
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/0c71d4c89559f72cec2592d078681a843bce570ePatch
- https://git.kernel.org/stable/c/0f000005da31f6947f843ce6b3e3a960540c6e00Patch
- https://git.kernel.org/stable/c/24b699bea7553fc0b98dad9d864befb6005ac7f1Patch
- https://git.kernel.org/stable/c/2ad5692db72874f02b9ad551d26345437ea4f7f3Patch
- https://git.kernel.org/stable/c/41c44e1f3112d7265dae522c026399b2a42d19efPatch
- https://git.kernel.org/stable/c/5871761c5f0f20d6e98bf3b6bd7486d857589554Patch
- https://git.kernel.org/stable/c/5c17cfe155d21954b4c7e2a78fa771cebcd86725Patch
- https://git.kernel.org/stable/c/90642ee9eb581a13569b1c0bd57e85d962215273Patch
- https://git.kernel.org/stable/c/d7fad2ce15bdbbd0fec3ebe999fd7cab2267f53ePatch
- https://git.kernel.org/stable/c/0c71d4c89559f72cec2592d078681a843bce570ePatch
- https://git.kernel.org/stable/c/0f000005da31f6947f843ce6b3e3a960540c6e00Patch
- https://git.kernel.org/stable/c/24b699bea7553fc0b98dad9d864befb6005ac7f1Patch
- https://git.kernel.org/stable/c/2ad5692db72874f02b9ad551d26345437ea4f7f3Patch
- https://git.kernel.org/stable/c/41c44e1f3112d7265dae522c026399b2a42d19efPatch
- https://git.kernel.org/stable/c/5871761c5f0f20d6e98bf3b6bd7486d857589554Patch
- https://git.kernel.org/stable/c/5c17cfe155d21954b4c7e2a78fa771cebcd86725Patch
- https://git.kernel.org/stable/c/90642ee9eb581a13569b1c0bd57e85d962215273Patch
- https://git.kernel.org/stable/c/d7fad2ce15bdbbd0fec3ebe999fd7cab2267f53ePatch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.