CVE-2021-47358

Advisory lineage Upstream: 0 Downstream: 7
Analyzed
Published: 21 May 2024, 14:44
Last modified:11 May 2026, 13:53

Vulnerability Summary

Overall Risk (default)
medium
31/100
CVSS Score
7.8 HIGH
v3.1 (nvd)
EPSS Score
0.02% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

21 May 2024, 14:44
Published
Vulnerability first disclosed
11 May 2026, 13:53
Last Modified
Vulnerability information updated

Description

In the Linux kernel, the following vulnerability has been resolved: staging: greybus: uart: fix tty use after free User space can hold a tty open indefinitely and tty drivers must not release the underlying structures until the last user is gone. Switch to using the tty-port reference counter to manage the life time of the greybus tty state to avoid use after free after a disconnect.

CVSS Metrics

  • v3.1•HIGH•Score: 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Trends

Current EPSS score: 0.02%• Percentile: 4%

Techniques & Countermeasures

  • CWE-416•Use After Free

    The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Affected Systems

  • linux•linux

    ≥ a18e15175708d39abbe9746ddc3479466b7800c3, < 92b67aaafb7c449db9f0c3dcabc0ff967cb3a42d | ≥ a18e15175708d39abbe9746ddc3479466b7800c3, < 64062fcaca8872f063ec9da011e7bf30470be33f | ≥ a18e15175708d39abbe9746ddc3479466b7800c3, < a5cfd51f6348e8fd7531461366946039c29c7e69 | ≥ a18e15175708d39abbe9746ddc3479466b7800c3, < 4dc56951a8d9d61d364d346c61a5f1d70b4f5e14 | ≥ a18e15175708d39abbe9746ddc3479466b7800c3, < b9e697e60ce9890e9258a73eb061288e7d68e5e6 | ≥ a18e15175708d39abbe9746ddc3479466b7800c3, < 9872ff6fdce8b229f01993b611b5d1719cb70ff1 | ≥ a18e15175708d39abbe9746ddc3479466b7800c3, < 92dc0b1f46e12cfabd28d709bb34f7a39431b44f | 4.9

  • linux•linux_kernel

    ≥ 4.9, < 4.9.285 | ≥ 4.10, < 4.14.249 | ≥ 4.15, < 4.19.209 | ≥ 4.20, < 5.4.150 | ≥ 5.5, < 5.10.70 | ≥ 5.11, < 5.14.9 | 5.15:rc1 | 5.15:rc2

References (7)