Answer in brief
CVE-2026-64336 records a Unknown severity vulnerability in USB: serial: keyspan_pda: fix information leak. 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-2026-64336 records a Unknown severity vulnerability in USB: serial: keyspan_pda: fix information leak. 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.
A CVSS score is not reported in the current record. 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.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=034e38e8f68767fb5438ae3e608ee82919674177 <b069b7029862fafaff331d4c664d97d4ae828d6d || >=034e38e8f68767fb5438ae3e608ee82919674177 <e52ca411f50539ff1d0c877b9312771ca8a858c1 || >=034e38e8f68767fb5438ae3e608ee82919674177 <2f7a6b8ab3845bd1da02604f1a874b52a4555a72 || >=034e38e8f68767fb5438ae3e608ee82919674177 <e1494191a3aac665d3a2fce16169a97c346253ec || >=034e38e8f68767fb5438ae3e608ee82919674177 <cf6ca0aefae03958cfb5b189b0adbfb25c06bfac || >=034e38e8f68767fb5438ae3e608ee82919674177 <d4b12b6b395e43a2b1d80be3745631fcaa9c047b || >=034e38e8f68767fb5438ae3e608ee82919674177 <6bfc8d01ac4068eced509f8fc74d0cd205e4dcec | b069b7029862fafaff331d4c664d97d4ae828d6d, e52ca411f50539ff1d0c877b9312771ca8a858c1, 2f7a6b8ab3845bd1da02604f1a874b52a4555a72, e1494191a3aac665d3a2fce16169a97c346253ec, cf6ca0aefae03958cfb5b189b0adbfb25c06bfac, d4b12b6b395e43a2b1d80be3745631fcaa9c047b, 6bfc8d01ac4068eced509f8fc74d0cd205e4dcec |
| Linux/Linuxgeneric | 5.11 | Not reported |
Published upstream
Jul 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 11, 2026
In the Linux kernel, the following vulnerability has been resolved: USB: serial: keyspan_pda: fix information leak The write() callback is supposed to return the number of characters accepted or a negative errno. Since the addition of write fifo support the keyspan_pda implementation will however return the number characters submitted to the device if the write urb is not already in use. If this number is larger than the number of characters passed to write(), the line discipline continues writing data from beyond the tty write buffer. Fix the information leak by making sure that keyspan_pda_write_start() returns zero on success as intended.
Quoted source text, attributed separately from HOL analysis.
A CVSS score is not reported in the current record. 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.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=034e38e8f68767fb5438ae3e608ee82919674177 <b069b7029862fafaff331d4c664d97d4ae828d6d || >=034e38e8f68767fb5438ae3e608ee82919674177 <e52ca411f50539ff1d0c877b9312771ca8a858c1 || >=034e38e8f68767fb5438ae3e608ee82919674177 <2f7a6b8ab3845bd1da02604f1a874b52a4555a72 || >=034e38e8f68767fb5438ae3e608ee82919674177 <e1494191a3aac665d3a2fce16169a97c346253ec || >=034e38e8f68767fb5438ae3e608ee82919674177 <cf6ca0aefae03958cfb5b189b0adbfb25c06bfac || >=034e38e8f68767fb5438ae3e608ee82919674177 <d4b12b6b395e43a2b1d80be3745631fcaa9c047b || >=034e38e8f68767fb5438ae3e608ee82919674177 <6bfc8d01ac4068eced509f8fc74d0cd205e4dcec | b069b7029862fafaff331d4c664d97d4ae828d6d, e52ca411f50539ff1d0c877b9312771ca8a858c1, 2f7a6b8ab3845bd1da02604f1a874b52a4555a72, e1494191a3aac665d3a2fce16169a97c346253ec, cf6ca0aefae03958cfb5b189b0adbfb25c06bfac, d4b12b6b395e43a2b1d80be3745631fcaa9c047b, 6bfc8d01ac4068eced509f8fc74d0cd205e4dcec |
| Linux/Linuxgeneric | 5.11 | Not reported |
Published upstream
Jul 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 11, 2026
In the Linux kernel, the following vulnerability has been resolved: USB: serial: keyspan_pda: fix information leak The write() callback is supposed to return the number of characters accepted or a negative errno. Since the addition of write fifo support the keyspan_pda implementation will however return the number characters submitted to the device if the write urb is not already in use. If this number is larger than the number of characters passed to write(), the line discipline continues writing data from beyond the tty write buffer. Fix the information leak by making sure that keyspan_pda_write_start() returns zero on success as intended.
Quoted source text, attributed separately from HOL analysis.