Skip to content
Noroxi
NVD / CVE Program· CNA Linux

CVE-2026-80788: nvmet-tcp: Do not WARN on remotely-controlled oversized SGL allocations

—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 0/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.19% (FIRST EPSS).
  • Fixed version: Linux Linux 737a3b535247226f6e1a7988fd9d6e63e7d6fc71, 7b6a54d4e7b0da423c2b53ed293fd36b16c0b19e, 7fd6da0f28932442b51658bac4ff55565ca9b377; azl3 kernel 6.6.152.1-1 on Azure Linux 3.0 6.6.157.1-1.

Low priority for now. Upgrade to Linux Linux 737a3b535247226f6e1a7988fd9d6e63e7d6fc71, 7b6a54d4e7b0da423c2b53ed293fd36b16c0b19e, 7fd6da0f28932442b51658bac4ff55565ca9b377; azl3 kernel 6.6.152.1-1 on Azure Linux 3.0 6.6.157.1-1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

Published
Sep 4, 2026
Updated
Oct 19, 2026
EPSS
0.1% · 9th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-80788

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

One daily email digest (06:00 UTC); connect a webhook for KEV listings and weaponized exploits every 10 minutes on paid plans, on the hour on the free plan.

Your free account also gets you

  • CVE alerts: add the products and versions you run, get the new CVEs that affect them
  • Uptime monitoring: 1 site, instant email when it goes down
  • Add your domain: subdomains and takeover risk scanned every week (1 domain)
  • 10 scans an hour on the security tools, at most 30 a day (3 a day without an account), an API key and MCP
  • All your scans in one panel: findings, what changed in the last scan, a report per domain or per client (PDF, share link)
All free tools

Sign up with email · Have an account? Sign in

Free account, no card. Unfollow any time.

Don't want an account? Get "Exploited this week" by email every MondayDon't want an account? RSS feed for linux records
Is your version affected? Check it

Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

We use this product, ask for help

Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 5.0affected
    • 872d26a391da92ed8f0c0f5cb5fef428067b7f30 and later · before 8d01f0d0e96485e39ad89b859ef85e1dc3020465affected · git
    • 872d26a391da92ed8f0c0f5cb5fef428067b7f30 and later · before 7b6a54d4e7b0da423c2b53ed293fd36b16c0b19eaffected · git
    • 872d26a391da92ed8f0c0f5cb5fef428067b7f30 and later · before e7077e6c45423dd2bb7de7b5fc4b018a8e6c4741affected · git
    • 872d26a391da92ed8f0c0f5cb5fef428067b7f30 and later · before 86cc450022473c4a29b43a09f3ec22a9ef566dacaffected · git
    • 872d26a391da92ed8f0c0f5cb5fef428067b7f30 and later · before c509f20be1cabda3087810bb2d658d66b3f31f35affected · git
    • 872d26a391da92ed8f0c0f5cb5fef428067b7f30 and later · before 9c95f7e66c62ee6c6abedcf1c04311f430ff5833affected · git
    • 872d26a391da92ed8f0c0f5cb5fef428067b7f30 and later · before 7fd6da0f28932442b51658bac4ff55565ca9b377affected · git
    • 872d26a391da92ed8f0c0f5cb5fef428067b7f30 and later · before 9b770e40bc00381e5ebf53653de5776773415be3affected · git
    • 872d26a391da92ed8f0c0f5cb5fef428067b7f30 and later · before 737a3b535247226f6e1a7988fd9d6e63e7d6fc71affected · git

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.187-16.1.187-1
Debian:12linux-6.12before 6.12.107-1~deb12u16.12.107-1~deb12u1
Debian:13linuxbefore 6.12.107-16.12.107-1
Debian:14linuxbefore 7.1.12-17.1.12-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-80786Sep 4, 2026 · fbdev: Wrap user-invoked calls to fb_set_var() in helper
    0Monitor
  • ← EarlierCVE-2026-80787Sep 4, 2026 · nvmet: pci-epf: fix use-after-free in nvmet_pci_epf_exec_iod_work()
    0Monitor
  • Later →CVE-2026-80789Sep 4, 2026 · nvmet-tcp: bound SGL data length before allocating command buffers
    0Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux737a3b535247226f6e1a7988fd9d6e63e7d6fc71Vendor (CNA)
Linux Linux7b6a54d4e7b0da423c2b53ed293fd36b16c0b19eVendor (CNA)
Linux Linux7fd6da0f28932442b51658bac4ff55565ca9b377Vendor (CNA)
Linux Linux86cc450022473c4a29b43a09f3ec22a9ef566dacVendor (CNA)
Linux Linux8d01f0d0e96485e39ad89b859ef85e1dc3020465Vendor (CNA)
Linux Linux9b770e40bc00381e5ebf53653de5776773415be3Vendor (CNA)
Linux Linux9c95f7e66c62ee6c6abedcf1c04311f430ff5833Vendor (CNA)
Linux Linuxc509f20be1cabda3087810bb2d658d66b3f31f35Vendor (CNA)
Linux Linuxe7077e6c45423dd2bb7de7b5fc4b018a8e6c4741Vendor (CNA)
azl3 kernel 6.6.150.1-1 on Azure Linux 3.0—Microsoft (MSRC)
azl3 kernel 6.6.152.1-1 on Azure Linux 3.06.6.157.1-1 · Release NotesMicrosoft (MSRC)
debian:linux6.1.187-1 · Debian:12Package registry (OSV)
debian:linux-6.126.12.107-1~deb12u1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Not on record for this CVE: patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

Technical details

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

References

Show all references (8 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records