8.4

CVE-2025-40292: linux

CVSS: 8.4v3.1HighDeferred
AliasesUBUNTU-CVE-2025-40292DEBIAN-CVE-2025-40292
Published 08-12-2025Last modified 15-10-2026
Open JSON

Vulnerability summary

CVE-2025-40292 is a high (CVSS 8.4) vulnerability in linux. EPSS estimates a 0.17% chance of exploitation in the next 30 days, higher than 5.9% of scored vulnerabilities.

Overall risk
34/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.4/10
010
High · v3.1 (CVE.org)
EPSS score
0.17%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 30 · Related 27
DLA-4436-1MGASA-2026-0017MGASA-2026-0018OPENSUSE-SU-2026:20145-1SUSE-SU-2026:0278-1SUSE-SU-2026:0281-1

Timeline

  1. 08-12-2025
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.17%

Chance of exploitation in the next 30 days

Percentile

6%

Versus all other CVEs

30-day change

0.00 pp

From 0.17% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.17%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Ubuntu127 products
  • linux< 6.8.0-106.106 | < 6.17.0-14.14
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 6.8.0-1050.53 | < 6.17.0-1007.7
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian1 product
  • linux< 6.1.159-1 | < 6.12.63-1 | < 6.17.8-1
Linux1 product
  • linux≥ 4959aebba8c06992abafa09d1e80965e0825af54, < 82f9028e83944a9eee5229cbc6fee9be1de8a62d | ≥ 4959aebba8c06992abafa09d1e80965e0825af54, < 946dec89c41726b94d31147ec528b96af0be1b5a | ≥ 4959aebba8c06992abafa09d1e80965e0825af54, < 82fe78065450d2d07f36a22e2b6b44955cf5ca5b | ≥ 4959aebba8c06992abafa09d1e80965e0825af54, < 3e9d89f2ecd3636bd4cbdfd0b2dfdaf58f9882e2 | ≥ 4959aebba8c06992abafa09d1e80965e0825af54, < 0c716703965ffc5ef4311b65cb5d84a703784717 | 6.1

3 vendors · 129 products

References

25 links
Show all 25 references