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CVE-2026-64336

UnknownEPSS 0.17%

Last modified

CVE-2026-64336 is a vulnerability of currently unknown severity. 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. EPSS estimates a 0.17% chance of exploitation in the next 30 days.

Description

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.

Metrics

EPSS Probability
0.17%

6.9th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 034e38e8f68767fb5438ae3e608ee82919674177, < b069b7029862fafaff331d4c664d97d4ae828d6d; >= 034e38e8f68767fb5438ae3e608ee82919674177, < e52ca411f50539ff1d0c877b9312771ca8a858c1; >= 034e38e8f68767fb5438ae3e608ee82919674177, < 2f7a6b8ab3845bd1da02604f1a874b52a4555a72; >= 034e38e8f68767fb5438ae3e608ee82919674177, < e1494191a3aac665d3a2fce16169a97c346253ec; >= 034e38e8f68767fb5438ae3e608ee82919674177, < cf6ca0aefae03958cfb5b189b0adbfb25c06bfac; >= 034e38e8f68767fb5438ae3e608ee82919674177, < d4b12b6b395e43a2b1d80be3745631fcaa9c047b; >= 034e38e8f68767fb5438ae3e608ee82919674177, < 6bfc8d01ac4068eced509f8fc74d0cd205e4dcec
LinuxLinux5.11

References

Timeline

Published
Last Modified
Status
Awaiting Analysis

Frequently Asked Questions

What is CVE-2026-64336?
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.
How severe is CVE-2026-64336?
Severity scoring for CVE-2026-64336 is pending analysis. The EPSS model estimates a 0.17% probability of exploitation in the next 30 days.
How do I fix CVE-2026-64336?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST