CVE-2026-90063virtio-net: Ensure that TCP packets don't overflow gso_segs
- —Not scoredno CVSS score yet
- 0.21%Exploitation in 30 daysEPSS · top 89% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: virtio-net: Ensure that TCP packets don't overflow gso_segs The user can specify any gso_size in a packet crafted with an AF_PACKET PACKET_VNET_HDR socket, even smaller than TCP_MIN_GSO_SIZE = 8. At the same time, GSO_MAX_SIZE = 8 * GSO_MAX_SEGS = 8 * 65535. When the user crafts a packet with gso_size < 8, there is a risk for partial GSO to overflow the 16-bit gso_segs field when dividing the SKB length by gso_size. Adjust gso_size of TCP packets to be at least TCP_MIN_GSO_SIZE = 8. Keep gso_size of UDP GSO packets, as gso_size=1 is valid and explicitly tested at tools/testing/selftests/net/tun.c:649.
Timeline
ID reserved
By Linux
- 6 days later
· 6 days later
Published
- 32 days later
· 32 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.
- EPSS (exploitation in 30 days)
- 0.21% · top 89% of all CVEs (15 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected 7c6d2ecbda83150b2036a2b36b21381ad4667762 – < d3d111fe809773edbb4ae121e36253b7d683509a
- affected 7c6d2ecbda83150b2036a2b36b21381ad4667762 – < 8f6667a081887c2b59c6f3dd86c1789ada563762
- affected 7c6d2ecbda83150b2036a2b36b21381ad4667762 – < 339f47ae04dcc6b5a730dd6bc70dddc8937c3260
- affected 7c6d2ecbda83150b2036a2b36b21381ad4667762 – < 29bd12c7c5f9d6cf855b87bace18f71e9607f9e8
- affected 7c6d2ecbda83150b2036a2b36b21381ad4667762 – < 0e5ed3b98d1d8d251acfdccfeaa607453ad12954
- affected 7c6d2ecbda83150b2036a2b36b21381ad4667762 – < 75c271c48f483af678e514734e10b2452410e08c
- affected 7c6d2ecbda83150b2036a2b36b21381ad4667762 – < c27c449d455aafd9018a3cbab150f1c42c87923f
- affected bfbaf151efe491e30697e21c8b7ae1b615480873
- affected 6c83456601e65a6dd371ddf595510183d198e9b1
- affected b3ebd9830c6026c98f03f7047c9d608573773f13
- affected b96fb681ca789629b8ba3da99ca3b2e6fa807f0a
- affected 4.14.187 – < 4.15
- affected 4.19.131 – < 4.20
- affected 5.4.46 – < 5.5
- affected 5.6.18 – < 5.7
- affected 5.7
- unaffected < 5.7
- unaffected 5.15.221 – ≤ 5.15.*
- unaffected 6.1.188 – ≤ 6.1.*
- unaffected 6.6.157 – ≤ 6.6.*
- unaffected 6.12.110 – ≤ 6.12.*
- unaffected 6.18.52 – ≤ 6.18.*
- unaffected 7.2.6 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References7
- https://git.kernel.org/stable/c/d3d111fe809773edbb4ae121e36253b7d683509a (opens in a new tab)
- https://git.kernel.org/stable/c/8f6667a081887c2b59c6f3dd86c1789ada563762 (opens in a new tab)
- https://git.kernel.org/stable/c/339f47ae04dcc6b5a730dd6bc70dddc8937c3260 (opens in a new tab)
- https://git.kernel.org/stable/c/29bd12c7c5f9d6cf855b87bace18f71e9607f9e8 (opens in a new tab)
- https://git.kernel.org/stable/c/0e5ed3b98d1d8d251acfdccfeaa607453ad12954 (opens in a new tab)
- https://git.kernel.org/stable/c/75c271c48f483af678e514734e10b2452410e08c (opens in a new tab)
- https://git.kernel.org/stable/c/c27c449d455aafd9018a3cbab150f1c42c87923f (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-81924 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
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[](https://cveledger.app/cve/CVE-2026-90063)Record last updated .