Riskcovery

CVE-2026-98587

firewire: cdev: fix back-transition for iso_resource_auto client resource

State
Published
Severity
Not scored
Published
Oct 18, 2026
Updated
Oct 19, 2026
Reserved
Sep 25, 2026

Read the record on cve.org

Description

In the Linux kernel, the following vulnerability has been resolved:

firewire: cdev: fix back-transition for iso_resource_auto client resource

The todo member of iso_resource_auto structure represents the state of the client resource and normally transitions in the following order:

ISO_RES_AUTO_ALLOC -> ISO_RES_AUTO_REALLOC -> ISO_RES_AUTO_DEALLOC

However, concurrent access from the work item and the file descriptor release function can cause the state to transition backwards from ISO_RES_AUTO_DEALLOC to ISO_RES_AUTO_REALLOC.

Prevent the back-transition by checking the current state before updating it in the work item.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • fcabbf40fae501379b4f3a057febe92d4b0ebdd8 to before ee1df60a0d0e8ab4b00137135733bdadd6d33dabAffected
  • fcabbf40fae501379b4f3a057febe92d4b0ebdd8 to before c6b51091cafff9ce6c03c1416aa13864d17ab97cAffected
LinuxLinux
  • 7.2Affected
  • before 7.2Not affected
  • 7.2.9 through 7.2.*Not affected
  • 7.3 and laterNot affected

References

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