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nvmet-tcp: Do not WARN on remotely-controlled oversized SGL allocations

Type: advisorySource: Official CVE List1 source record

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.

Announced Group revision 1
Original source ↗

CVE-2026-80788

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-80788

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "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",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/nvme/target/tcp.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-80788

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#34804 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement

Revision history

  1. CVE-2026-80788 · Revision 1Source updated