CVE-2026-80788
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: nvmet-tcp: Do not WARN on remotely-controlled oversized SGL allocations When fuzzing the nvme target code, I tripped a kernel warning in nvmet_tcp_map_data() because the length passed into the allocator is controlled by the remote initiator. A remote initiator that sends a command with an SGL claiming a huge number, can create a scatterlist and iovec allocation of over 1 million entries, which causes the backing kmalloc call to exceed MAX_PAGE_ORDER and then the page allocator will trip on a WARN_ON_ONCE_GFP() message: WARNING: mm/page_alloc.c:5280 __alloc_frozen_pages_noprof Workqueue: nvmet_tcp_wq nvmet_tcp_io_work ... sgl_alloc_order nvmet_tcp_map_data nvmet_tcp_try_recv_pdu As it's never good to trip a kernel warning remotely due to many systems having panic-on-warn enabled, let's silence it by just add GFP_NOWARN to the allocation flags.
Severity
Not scored
CVSS score
Not available
Vulnerability status
Received
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-09-04 16:18:04.857000
Last modified
2026-10-19 09:17:12.807000
View original CVE JSON
{
"id": "CVE-2026-80788",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-09-04T16:18:04.857",
"lastModified": "2026-10-19T09:17:12.807",
"vulnStatus": "Received",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvmet-tcp: Do not WARN on remotely-controlled oversized SGL allocations\n\nWhen fuzzing the nvme target code, I tripped a kernel warning in\nnvmet_tcp_map_data() because the length passed into the allocator is\ncontrolled by the remote initiator.\n\nA remote initiator that sends a command with an SGL claiming a huge\nnumber, can create a scatterlist and iovec allocation of over 1 million\nentries, which causes the backing kmalloc call to exceed MAX_PAGE_ORDER\nand then the page allocator will trip on a WARN_ON_ONCE_GFP() message:\n\n WARNING: mm/page_alloc.c:5280 __alloc_frozen_pages_noprof\n Workqueue: nvmet_tcp_wq nvmet_tcp_io_work\n ...\n sgl_alloc_order\n nvmet_tcp_map_data\n nvmet_tcp_try_recv_pdu\n\nAs it's never good to trip a kernel warning remotely due to many systems\nhaving panic-on-warn enabled, let's silence it by just add GFP_NOWARN to\nthe allocation flags."
}
],
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "unaffected",
"programFiles": [
"drivers/nvme/target/tcp.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "872d26a391da92ed8f0c0f5cb5fef428067b7f30",
"lessThan": "8d01f0d0e96485e39ad89b859ef85e1dc3020465",
"versionType": "git",
"status": "affected"
},
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"status": "affected"
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{
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}
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},
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "affected",
"programFiles": [
"drivers/nvme/target/tcp.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "5.0",
"status": "affected"
},
{
"version": "0",
"lessThan": "5.0",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "5.10.267",
"lessThanOrEqual": "5.10.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "5.15.218",
"lessThanOrEqual": "5.15.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.1.185",
"lessThanOrEqual": "6.1.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.6.154",
"lessThanOrEqual": "6.6.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.12.106",
"lessThanOrEqual": "6.12.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.18.47",
"lessThanOrEqual": "6.18.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.1.11",
"lessThanOrEqual": "7.1.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.2.1",
"lessThanOrEqual": "7.2.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.3",
"lessThanOrEqual": "*",
"versionType": "original_commit_for_fix",
"status": "unaffected"
}
]
}
]
}
],
"metrics": {},
"references": [
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}