Riskcovery

CVE-2021-47105

ice: xsk: return xsk buffers back to pool when cleaning the ring

State
Published
Severity
Not scored
Published
Mar 4, 2024
Updated
May 11, 2026
Reserved
Mar 4, 2024

Read the record on cve.org

Description

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

ice: xsk: return xsk buffers back to pool when cleaning the ring

Currently we only NULL the xdp_buff pointer in the internal SW ring but we never give it back to the xsk buffer pool. This means that buffers can be leaked out of the buff pool and never be used again.

Add missing xsk_buff_free() call to the routine that is supposed to clean the entries that are left in the ring so that these buffers in the umem can be used by other sockets.

Also, only go through the space that is actually left to be cleaned instead of a whole ring.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • 2d4238f5569722197612656163d824098208519c to before ad6d20da2cfbe14b7b1200d15f39e65988b0b9e8Affected
  • 2d4238f5569722197612656163d824098208519c to before afe8a3ba85ec2a6b6849367e25c06a2f8e0ddd05Affected
LinuxLinux
  • 5.5Affected
  • before 5.5Not affected
  • 5.15.12 through 5.15.*Not affected
  • 5.16 and laterNot affected

References

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