Riskcovery

CVE-2024-45030

igb: cope with large MAX_SKB_FRAGS

State
Published
Severity
9.8 Critical
Published
Sep 11, 2024
Updated
Aug 5, 2026
Reserved
Aug 21, 2024

Read the record on cve.org

Description

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

igb: cope with large MAX_SKB_FRAGS

Sabrina reports that the igb driver does not cope well with large MAX_SKB_FRAG values: setting MAX_SKB_FRAG to 45 causes payload corruption on TX.

An easy reproducer is to run ssh to connect to the machine. With MAX_SKB_FRAGS=17 it works, with MAX_SKB_FRAGS=45 it fails. This has been reported originally in https://bugzilla.redhat.com/show_bug.cgi?id=2265320

The root cause of the issue is that the driver does not take into account properly the (possibly large) shared info size when selecting the ring layout, and will try to fit two packets inside the same 4K page even when the 1st fraglist will trump over the 2nd head.

Address the issue by checking if 2K buffers are insufficient.

Scores

CVSSScoreVectorSource
3.19.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HLinux

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • 3948b05950fdd64002a5f182c65ba5cf2d53cf71 to before 8ea80ff5d8298356d28077bc30913ed37df65109Affected
  • 3948b05950fdd64002a5f182c65ba5cf2d53cf71 to before b52bd8bcb9e8ff250c79b44f9af8b15cae8911abAffected
  • 3948b05950fdd64002a5f182c65ba5cf2d53cf71 to before 8aba27c4a5020abdf60149239198297f88338a8dAffected
LinuxLinux
  • 6.4Affected
  • before 6.4Not affected
  • 6.6.48 through 6.6.*Not affected
  • 6.10.7 through 6.10.*Not affected
  • 6.11 and laterNot affected

References

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