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NVD / CVE Program· CNA Linux

CVE-2026-72326: net/sched: cake: reject overhead values that underflow length

—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: 0.22% (FIRST EPSS).
  • Fixed version: Linux Linux 297f459865360b46a887667cbf3aac6a6f013841, 336c1e414fc0e9844d445174e8ada2a7dd8d1c4b, 7aa0e64fea778a9e3df73e64da95367ff8ad2ea5.

Low priority for now. Upgrade to Linux Linux 297f459865360b46a887667cbf3aac6a6f013841, 336c1e414fc0e9844d445174e8ada2a7dd8d1c4b, 7aa0e64fea778a9e3df73e64da95367ff8ad2ea5 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: net/sched: cake: reject overhead values that underflow length CAKE accepts signed overhead values and stores them in an s16, but the adjusted packet length calculation uses unsigned arithmetic. A negative effective length can therefore wrap to a large value. Such configurations make rate accounting depend on integer wraparound rather than on the packet size userspace intended to model. A static netlink lower bound is not enough because packets reaching CAKE can be smaller than any reasonable manual-overhead allowance. Fold the signed overhead adjustment into the existing datapath MPU clamp so negative adjusted lengths are clamped before link-layer framing adjustments.

Published
Aug 15, 2026
Updated
Nov 6, 2026
EPSS
0.2% · 12th 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 · 0.2%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

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

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  • when exploit code appears or is weaponized
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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.

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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

    • 4.19affected
    • a729b7f0bd5bf4919306556aed614438f5174537 and later · before f511dd7bf6077aa7afbe72914520553fedaacbb4affected · git
    • a729b7f0bd5bf4919306556aed614438f5174537 and later · before e1df6cff03aad8c96e55a8b2a991e505c7a3ff6faffected · git
    • a729b7f0bd5bf4919306556aed614438f5174537 and later · before 297f459865360b46a887667cbf3aac6a6f013841affected · git
    • a729b7f0bd5bf4919306556aed614438f5174537 and later · before 336c1e414fc0e9844d445174e8ada2a7dd8d1c4baffected · git
    • a729b7f0bd5bf4919306556aed614438f5174537 and later · before bcdf3a3664f7d2c4e37e155f30f72ef33f041804affected · git
    • a729b7f0bd5bf4919306556aed614438f5174537 and later · before 7aa0e64fea778a9e3df73e64da95367ff8ad2ea5affected · git
    • a729b7f0bd5bf4919306556aed614438f5174537 and later · before f1e7807df5bf2d42a40266430e9f82f37633cdcfaffected · git
    • a729b7f0bd5bf4919306556aed614438f5174537 and later · before b7f97cae7ec1b6c3c32843c42be218690d310467affected · git
    • before 4.19not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.180-16.1.180-1
Debian:13linuxbefore 6.12.100-16.12.100-1
Debian:14linuxbefore 7.1.5-17.1.5-1

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-2026-72324Aug 15, 2026 · gpio: mvebu: free generic chips on unbind
    0Monitor
  • ← EarlierCVE-2026-72325Aug 15, 2026 · perf/x86/amd/core: Avoid enabling BRS from the SVM reload path
    0Monitor
  • Later →CVE-2026-72329Aug 15, 2026 · net/liquidio: drop cached VF pci_dev LUT
    37Monitor

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 Linux297f459865360b46a887667cbf3aac6a6f013841Vendor (CNA)
Linux Linux336c1e414fc0e9844d445174e8ada2a7dd8d1c4bVendor (CNA)
Linux Linux7aa0e64fea778a9e3df73e64da95367ff8ad2ea5Vendor (CNA)
Linux Linuxb7f97cae7ec1b6c3c32843c42be218690d310467Vendor (CNA)
Linux Linuxbcdf3a3664f7d2c4e37e155f30f72ef33f041804Vendor (CNA)
Linux Linuxe1df6cff03aad8c96e55a8b2a991e505c7a3ff6fVendor (CNA)
Linux Linuxf1e7807df5bf2d42a40266430e9f82f37633cdcfVendor (CNA)
Linux Linuxf511dd7bf6077aa7afbe72914520553fedaacbb4Vendor (CNA)
debian:linux6.1.180-1 · 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 (7 more)

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

All records