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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2025-40292 Detail

Description

In the Linux kernel, the following vulnerability has been resolved: virtio-net: fix received length check in big packets Since commit 4959aebba8c0 ("virtio-net: use mtu size as buffer length for big packets"), when guest gso is off, the allocated size for big packets is not MAX_SKB_FRAGS * PAGE_SIZE anymore but depends on negotiated MTU. The number of allocated frags for big packets is stored in vi->big_packets_num_skbfrags. Because the host announced buffer length can be malicious (e.g. the host vhost_net driver's get_rx_bufs is modified to announce incorrect length), we need a check in virtio_net receive path. Currently, the check is not adapted to the new change which can lead to NULL page pointer dereference in the below while loop when receiving length that is larger than the allocated one. This commit fixes the received length check corresponding to the new change.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/0c716703965ffc5ef4311b65cb5d84a703784717 kernel.org
https://git.kernel.org/stable/c/3e9d89f2ecd3636bd4cbdfd0b2dfdaf58f9882e2 kernel.org
https://git.kernel.org/stable/c/82f9028e83944a9eee5229cbc6fee9be1de8a62d kernel.org
https://git.kernel.org/stable/c/82fe78065450d2d07f36a22e2b6b44955cf5ca5b kernel.org
https://git.kernel.org/stable/c/946dec89c41726b94d31147ec528b96af0be1b5a kernel.org

Weakness Enumeration

CWE-ID CWE Name Source

Change History

1 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2025-40292
NVD Published Date:
12/07/2025
NVD Last Modified:
12/07/2025
Source:
kernel.org