Answer in brief
CVE-2021-47358 records a High severity (CVSS 7.8) vulnerability in staging: greybus: uart: fix tty use after free. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
Answer in brief
CVE-2021-47358 records a High severity (CVSS 7.8) vulnerability in staging: greybus: uart: fix tty use after free. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:5.15:rc1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:5.15:rc2:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=a18e15175708d39abbe9746ddc3479466b7800c3 <92b67aaafb7c449db9f0c3dcabc0ff967cb3a42d || >=a18e15175708d39abbe9746ddc3479466b7800c3 <64062fcaca8872f063ec9da011e7bf30470be33f || >=a18e15175708d39abbe9746ddc3479466b7800c3 <a5cfd51f6348e8fd7531461366946039c29c7e69 || >=a18e15175708d39abbe9746ddc3479466b7800c3 <4dc56951a8d9d61d364d346c61a5f1d70b4f5e14 || >=a18e15175708d39abbe9746ddc3479466b7800c3 <b9e697e60ce9890e9258a73eb061288e7d68e5e6 || >=a18e15175708d39abbe9746ddc3479466b7800c3 <9872ff6fdce8b229f01993b611b5d1719cb70ff1 || >=a18e15175708d39abbe9746ddc3479466b7800c3 <92dc0b1f46e12cfabd28d709bb34f7a39431b44f | 92b67aaafb7c449db9f0c3dcabc0ff967cb3a42d, 64062fcaca8872f063ec9da011e7bf30470be33f, a5cfd51f6348e8fd7531461366946039c29c7e69, 4dc56951a8d9d61d364d346c61a5f1d70b4f5e14, b9e697e60ce9890e9258a73eb061288e7d68e5e6, 9872ff6fdce8b229f01993b611b5d1719cb70ff1, 92dc0b1f46e12cfabd28d709bb34f7a39431b44f |
| Linux/Linuxgeneric | 4.9 | Not reported |
Published upstream
May 21, 2024
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 4, 2026
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.
Quoted source text, attributed separately from HOL analysis.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:5.15:rc1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:5.15:rc2:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=a18e15175708d39abbe9746ddc3479466b7800c3 <92b67aaafb7c449db9f0c3dcabc0ff967cb3a42d || >=a18e15175708d39abbe9746ddc3479466b7800c3 <64062fcaca8872f063ec9da011e7bf30470be33f || >=a18e15175708d39abbe9746ddc3479466b7800c3 <a5cfd51f6348e8fd7531461366946039c29c7e69 || >=a18e15175708d39abbe9746ddc3479466b7800c3 <4dc56951a8d9d61d364d346c61a5f1d70b4f5e14 || >=a18e15175708d39abbe9746ddc3479466b7800c3 <b9e697e60ce9890e9258a73eb061288e7d68e5e6 || >=a18e15175708d39abbe9746ddc3479466b7800c3 <9872ff6fdce8b229f01993b611b5d1719cb70ff1 || >=a18e15175708d39abbe9746ddc3479466b7800c3 <92dc0b1f46e12cfabd28d709bb34f7a39431b44f | 92b67aaafb7c449db9f0c3dcabc0ff967cb3a42d, 64062fcaca8872f063ec9da011e7bf30470be33f, a5cfd51f6348e8fd7531461366946039c29c7e69, 4dc56951a8d9d61d364d346c61a5f1d70b4f5e14, b9e697e60ce9890e9258a73eb061288e7d68e5e6, 9872ff6fdce8b229f01993b611b5d1719cb70ff1, 92dc0b1f46e12cfabd28d709bb34f7a39431b44f |
| Linux/Linuxgeneric | 4.9 | Not reported |
Published upstream
May 21, 2024
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 4, 2026
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.
Quoted source text, attributed separately from HOL analysis.