virtio-net: Ensure that TCP packets don't overflow gso_segs
Summary
| CVE | CVE-2026-90063 |
|---|
| State | PUBLISHED |
|---|
| Assigner | Linux |
|---|
| Source Priority | CVE Program / NVD first with legacy fallback |
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| Published | 2026-09-17 17:16:55 UTC |
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| Updated | 2026-09-17 17:16:55 UTC |
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| 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. |
|---|
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|
| CNA |
Linux |
Linux |
affected 7c6d2ecbda83150b2036a2b36b21381ad4667762 d3d111fe809773edbb4ae121e36253b7d683509a git |
Not specified |
| CNA |
Linux |
Linux |
affected 7c6d2ecbda83150b2036a2b36b21381ad4667762 8f6667a081887c2b59c6f3dd86c1789ada563762 git |
Not specified |
| CNA |
Linux |
Linux |
affected 7c6d2ecbda83150b2036a2b36b21381ad4667762 339f47ae04dcc6b5a730dd6bc70dddc8937c3260 git |
Not specified |
| CNA |
Linux |
Linux |
affected 7c6d2ecbda83150b2036a2b36b21381ad4667762 29bd12c7c5f9d6cf855b87bace18f71e9607f9e8 git |
Not specified |
| CNA |
Linux |
Linux |
affected 7c6d2ecbda83150b2036a2b36b21381ad4667762 0e5ed3b98d1d8d251acfdccfeaa607453ad12954 git |
Not specified |
| CNA |
Linux |
Linux |
affected 7c6d2ecbda83150b2036a2b36b21381ad4667762 75c271c48f483af678e514734e10b2452410e08c git |
Not specified |
| CNA |
Linux |
Linux |
affected 7c6d2ecbda83150b2036a2b36b21381ad4667762 c27c449d455aafd9018a3cbab150f1c42c87923f git |
Not specified |
| CNA |
Linux |
Linux |
affected bfbaf151efe491e30697e21c8b7ae1b615480873 git |
Not specified |
| CNA |
Linux |
Linux |
affected 6c83456601e65a6dd371ddf595510183d198e9b1 git |
Not specified |
| CNA |
Linux |
Linux |
affected b3ebd9830c6026c98f03f7047c9d608573773f13 git |
Not specified |
| CNA |
Linux |
Linux |
affected b96fb681ca789629b8ba3da99ca3b2e6fa807f0a git |
Not specified |
| CNA |
Linux |
Linux |
affected 4.14.187 4.15 semver |
Not specified |
| CNA |
Linux |
Linux |
affected 4.19.131 4.20 semver |
Not specified |
| CNA |
Linux |
Linux |
affected 5.4.46 5.5 semver |
Not specified |
| CNA |
Linux |
Linux |
affected 5.6.18 5.7 semver |
Not specified |
| CNA |
Linux |
Linux |
affected 5.7 |
Not specified |
| CNA |
Linux |
Linux |
unaffected 5.7 semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 5.15.221 5.15.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 6.1.188 6.1.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 6.6.157 6.6.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 6.12.110 6.12.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 6.18.52 6.18.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 7.2.6 7.2.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 7.3-rc1 * original_commit_for_fix |
Not specified |
References
| Reference | Source | Link | Tags |
|---|
| git.kernel.org/stable/c/29bd12c7c5f9d6cf855b87bace18f71e9607f9e8 |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/8f6667a081887c2b59c6f3dd86c1789ada563762 |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/0e5ed3b98d1d8d251acfdccfeaa607453ad12954 |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/c27c449d455aafd9018a3cbab150f1c42c87923f |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/339f47ae04dcc6b5a730dd6bc70dddc8937c3260 |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/75c271c48f483af678e514734e10b2452410e08c |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/d3d111fe809773edbb4ae121e36253b7d683509a |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| CVE Program record |
CVE.ORG |
www.cve.org |
canonical |
| NVD vulnerability detail |
NVD |
nvd.nist.gov |
canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.