CVE-2025-40046 (GCVE-0-2025-40046)

Vulnerability from cvelistv5 – Published: 2025-10-28 11:48 – Updated: 2025-12-01 06:16
VLAI?
Summary
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 6699ec9a23f85f1764183430209c741847c45f12 , < 8bcc9eaf1b19f1a7029cba19f6bd4122b40f6c4f (git)
Affected: 6699ec9a23f85f1764183430209c741847c45f12 , < 09cfd3c52ea76f43b3cb15e570aeddf633d65e80 (git)
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    Linux Linux Affected: 6.15
Unaffected: 0 , < 6.15 (semver)
Unaffected: 6.17.3 , ≤ 6.17.* (semver)
Unaffected: 6.18 , ≤ * (original_commit_for_fix)
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    "datePublished": "2025-10-28T11:48:24.022Z",
    "dateReserved": "2025-04-16T07:20:57.154Z",
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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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