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CVE-2026-98754

UnknownEPSS 0.17%

Last modified

CVE-2026-98754 is a vulnerability of currently unknown severity. In the Linux kernel, the following vulnerability has been resolved: tty: vcc: hold port lock when clearing tty pointer in vcc_cleanup vcc_cleanup() sets port->tty to NULL without holding port->lock, racing with vcc_event() LDC callbacks that read port->tty under port->lock and then use tty->port. This can cause a use-after-free when the callback dereferences tty->port after cleanup has already destroyed and freed it.. EPSS estimates a 0.17% chance of exploitation in the next 30 days.

Description

In the Linux kernel, the following vulnerability has been resolved: tty: vcc: hold port lock when clearing tty pointer in vcc_cleanup vcc_cleanup() sets port->tty to NULL without holding port->lock, racing with vcc_event() LDC callbacks that read port->tty under port->lock and then use tty->port. This can cause a use-after-free when the callback dereferences tty->port after cleanup has already destroyed and freed it.

Metrics

EPSS Probability
0.17%

6.0th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

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

VendorProductVersions
LinuxLinux>= 8f03f948ba356b7cb254b45a4e78b5b3d86fd3bb, < b0ad9d025c3229a628a82fbaa7578891075a950d; >= 8f03f948ba356b7cb254b45a4e78b5b3d86fd3bb, < b193617080b7036d143674089bcfb7d2ba3db588; >= 8f03f948ba356b7cb254b45a4e78b5b3d86fd3bb, < afcbb821c571f39b273127a7c7d26cb2cef27d2f; >= 8f03f948ba356b7cb254b45a4e78b5b3d86fd3bb, < 57753441ef84bee3bf0e9ee1e3778d119c44aa32; >= 8f03f948ba356b7cb254b45a4e78b5b3d86fd3bb, < 88f6ecb058801e9ce7b9aabc966530118d7cd53c; >= 8f03f948ba356b7cb254b45a4e78b5b3d86fd3bb, < 821050631750e982007c0856c119346edba51cae; >= 8f03f948ba356b7cb254b45a4e78b5b3d86fd3bb, < 1a9fb9eaeb69b1f6c00bed09289a33d9fe1e7ae4; >= 8f03f948ba356b7cb254b45a4e78b5b3d86fd3bb, < 03b49c991abb8d021ca6fe51cd173447236b0552
LinuxLinux4.14

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-98754?
In the Linux kernel, the following vulnerability has been resolved: tty: vcc: hold port lock when clearing tty pointer in vcc_cleanup vcc_cleanup() sets port->tty to NULL without holding port->lock, racing with vcc_event() LDC callbacks that read port->tty under port->lock and then use tty->port. This can cause a use-after-free when the callback dereferences tty->port after cleanup has already destroyed and freed it.
How severe is CVE-2026-98754?
Severity scoring for CVE-2026-98754 is pending analysis. The EPSS model estimates a 0.17% probability of exploitation in the next 30 days.
How do I fix CVE-2026-98754?
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