CVE-2026-80788

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.

CVSS

No CVSS.

References

Link	Resource
https://git.kernel.org/stable/c/737a3b535247226f6e1a7988fd9d6e63e7d6fc71
https://git.kernel.org/stable/c/7b6a54d4e7b0da423c2b53ed293fd36b16c0b19e
https://git.kernel.org/stable/c/7fd6da0f28932442b51658bac4ff55565ca9b377
https://git.kernel.org/stable/c/86cc450022473c4a29b43a09f3ec22a9ef566dac
https://git.kernel.org/stable/c/8d01f0d0e96485e39ad89b859ef85e1dc3020465
https://git.kernel.org/stable/c/9b770e40bc00381e5ebf53653de5776773415be3
https://git.kernel.org/stable/c/9c95f7e66c62ee6c6abedcf1c04311f430ff5833
https://git.kernel.org/stable/c/c509f20be1cabda3087810bb2d658d66b3f31f35
https://git.kernel.org/stable/c/e7077e6c45423dd2bb7de7b5fc4b018a8e6c4741

Configurations

No configuration.

History

No history.

Information

Published : 2026-09-04 16:18

Updated : 2026-09-07 15:17

NVD link : CVE-2026-80788

Mitre link : CVE-2026-80788

CVE.ORG link : CVE-2026-80788

JSON object : View

Products Affected

No product.

CWE

No CWE.

{"id": "CVE-2026-80788", "cveTags": [], "metrics": {}, "affected": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "affectedData": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "872d26a391da92ed8f0c0f5cb5fef428067b7f30", "lessThan": "8d01f0d0e96485e39ad89b859ef85e1dc3020465", "versionType": "git"}, {"status": "affected", "version": "872d26a391da92ed8f0c0f5cb5fef428067b7f30", "lessThan": "7b6a54d4e7b0da423c2b53ed293fd36b16c0b19e", "versionType": "git"}, {"status": "affected", "version": "872d26a391da92ed8f0c0f5cb5fef428067b7f30", "lessThan": "e7077e6c45423dd2bb7de7b5fc4b018a8e6c4741", "versionType": "git"}, {"status": "affected", "version": "872d26a391da92ed8f0c0f5cb5fef428067b7f30", "lessThan": "86cc450022473c4a29b43a09f3ec22a9ef566dac", "versionType": "git"}, {"status": "affected", "version": "872d26a391da92ed8f0c0f5cb5fef428067b7f30", "lessThan": "c509f20be1cabda3087810bb2d658d66b3f31f35", "versionType": "git"}, {"status": "affected", "version": "872d26a391da92ed8f0c0f5cb5fef428067b7f30", "lessThan": "9c95f7e66c62ee6c6abedcf1c04311f430ff5833", "versionType": "git"}, {"status": "affected", "version": "872d26a391da92ed8f0c0f5cb5fef428067b7f30", "lessThan": "7fd6da0f28932442b51658bac4ff55565ca9b377", "versionType": "git"}, {"status": "affected", "version": "872d26a391da92ed8f0c0f5cb5fef428067b7f30", "lessThan": "9b770e40bc00381e5ebf53653de5776773415be3", "versionType": "git"}, {"status": "affected", "version": "872d26a391da92ed8f0c0f5cb5fef428067b7f30", "lessThan": "737a3b535247226f6e1a7988fd9d6e63e7d6fc71", "versionType": "git"}], "programFiles": ["drivers/nvme/target/tcp.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.0"}, {"status": "unaffected", "version": "0", "lessThan": "5.0", "versionType": "semver"}, {"status": "unaffected", "version": "5.10.267", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.218", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.185", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.154", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.106", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.47", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.1.11", "versionType": "semver", "lessThanOrEqual": "7.1.*"}, {"status": "unaffected", "version": "7.2.1", "versionType": "semver", "lessThanOrEqual": "7.2.*"}, {"status": "unaffected", "version": "7.3-rc1", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/nvme/target/tcp.c"], "defaultStatus": "affected"}]}], "published": "2026-09-04T16:18:04.857", "references": [{"url": "https://git.kernel.org/stable/c/737a3b535247226f6e1a7988fd9d6e63e7d6fc71", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/7b6a54d4e7b0da423c2b53ed293fd36b16c0b19e", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/7fd6da0f28932442b51658bac4ff55565ca9b377", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/86cc450022473c4a29b43a09f3ec22a9ef566dac", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/8d01f0d0e96485e39ad89b859ef85e1dc3020465", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/9b770e40bc00381e5ebf53653de5776773415be3", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/9c95f7e66c62ee6c6abedcf1c04311f430ff5833", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/c509f20be1cabda3087810bb2d658d66b3f31f35", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/e7077e6c45423dd2bb7de7b5fc4b018a8e6c4741", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Received", "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."}], "lastModified": "2026-09-07T15:17:32.710", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}