Skip to content
CVE PROGRAM SOURCE RECORD8.6 High

CVE-2025-40046

io_uring/zcrx: fix overshooting recv limit

Read JSON ↗CVE.org ↗
Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: io_uring/zcrx: fix overshooting recv limit It's reported that sometimes a zcrx request can receive more than was requested. It's caused by io_zcrx_recv_skb() adjusting desc->count for all received buffers including frag lists, but then doing recursive calls to process frag list skbs, which leads to desc->count double accounting and underflow.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 6699ec9a23f85f1764183430209c741847c45f12 to < 8bcc9eaf1b19f1a7029cba19f6bd4122b40f6c4faffected
  • 6699ec9a23f85f1764183430209c741847c45f12 to < 09cfd3c52ea76f43b3cb15e570aeddf633d65e80affected

Linux Linux

Default version status: affected

  • 6.15affected
  • 0 to < 6.15unaffected
  • 6.17.3 to ≤ 6.17.*unaffected
  • 6.18 to ≤ *unaffected

References