CVE-2025-40292
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2025
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
virtio-net: fix received length check in big packets
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.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 4959aebba8c06992abafa09d1e80965e0825af54 | affected | git | 82f9028e83944a9eee5229cbc6fee9be1de8a62d | Unavailable | None listed |
| 4959aebba8c06992abafa09d1e80965e0825af54 | affected | git | 946dec89c41726b94d31147ec528b96af0be1b5a | Unavailable | None listed |
| 4959aebba8c06992abafa09d1e80965e0825af54 | affected | git | 82fe78065450d2d07f36a22e2b6b44955cf5ca5b | Unavailable | None listed |
| 4959aebba8c06992abafa09d1e80965e0825af54 | affected | git | 3e9d89f2ecd3636bd4cbdfd0b2dfdaf58f9882e2 | Unavailable | None listed |
| 4959aebba8c06992abafa09d1e80965e0825af54 | affected | git | 0c716703965ffc5ef4311b65cb5d84a703784717 | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 6.1 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 6.1 | Unavailable | None listed |
| 6.1.159 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.117 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.58 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.17.8 | unaffected | semver | Unavailable | 6.17.* | None listed |
| 6.18 | unaffected | original_commit_for_fix | Unavailable | * | None listed |