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NVD / CVE Program· CNA Linux

CVE-2025-37820: xen-netfront: handle NULL returned by xdp_convert_buff_to_frame()

MediumCVSS 5.5 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 22/100)

  • 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: 0.40% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • According to CISA the attack is automatable: targets can be found by mass scanning.
  • Fixed version: Linux Linux 5b83d30c63f9964acb1bc63eb8e670b9e0d2c240, cc3628dcd851ddd8d418bf0c897024b4621ddc92, cefd8a2e2de46209ce66e6d30c237eb59b6c5bfa; cbl2 kernel 5.15.202.1-1 on CBL-Mariner 2.0 Release Notes.
  • Severity is disputed: the assigning authority (CNA) scores it 7.5, NVD 5.5.

Low priority for now. Upgrade to Linux Linux 5b83d30c63f9964acb1bc63eb8e670b9e0d2c240, cc3628dcd851ddd8d418bf0c897024b4621ddc92, cefd8a2e2de46209ce66e6d30c237eb59b6c5bfa; cbl2 kernel 5.15.202.1-1 on CBL-Mariner 2.0 Release Notes 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: xen-netfront: handle NULL returned by xdp_convert_buff_to_frame() The function xdp_convert_buff_to_frame() may return NULL if it fails to correctly convert the XDP buffer into an XDP frame due to memory constraints, internal errors, or invalid data. Failing to check for NULL may lead to a NULL pointer dereference if the result is used later in processing, potentially causing crashes, data corruption, or undefined behavior. On XDP redirect failure, the associated page must be released explicitly if it was previously retained via get_page(). Failing to do so may result in a memory leak, as the pages reference count is not decremented.

Published
May 8, 2025
Updated
Oct 15, 2026
EPSS
0.4% · 34th percentile

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.4%

CISA SSVC decision

Exploitation
none
Automatable
yes
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
5.5
CNA · Linux
7.5
2.0 point gap

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

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-2025-37820

When you'll hear from us

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

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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.

VendorProduct
linuxlinux kernel
debiandebian linux

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

    • 5.9affected
    • 6c5aa6fc4defc2a0977a2c59e4710d50fa1e834c and later · before 5b83d30c63f9964acb1bc63eb8e670b9e0d2c240affected · git
    • 6c5aa6fc4defc2a0977a2c59e4710d50fa1e834c and later · before cefd8a2e2de46209ce66e6d30c237eb59b6c5bfaaffected · git
    • 6c5aa6fc4defc2a0977a2c59e4710d50fa1e834c and later · before d6a9c4e6f9b3ec3ad98468c950ad214af8a2efb9affected · git
    • 6c5aa6fc4defc2a0977a2c59e4710d50fa1e834c and later · before eefccd889df3b49d92e7349d94c4aa7e1ba19f6caffected · git
    • 6c5aa6fc4defc2a0977a2c59e4710d50fa1e834c and later · before cc3628dcd851ddd8d418bf0c897024b4621ddc92affected · git
    • before 5.9not affected · semver
    • 6.1.136 and later · up to and including 6.1.*not affected · semver
    • 6.6.89 and later · up to and including 6.6.*not affected · semver
    • 6.12.26 and later · up to and including 6.12.*not affected · semver
Affected versions · NVD (6)

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • debian debian linux11.0
  • linux linux kernel5.9 and later · before 6.1.136
  • linux linux kernel6.2 and later · before 6.6.89
  • linux linux kernel6.7 and later · before 6.12.26
  • linux linux kernel6.13 and later · before 6.14.5
  • linux linux kernel6.15

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.137-16.1.137-1
Debian:13linuxbefore 6.12.27-16.12.27-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe…KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now

Published before and after this one in the same product

  • ← EarlierCVE-2025-37811May 8, 2025 · usb: chipidea: ci_hdrc_imx: fix usbmisc handling
    22Monitor
  • ← EarlierCVE-2025-37813May 8, 2025 · usb: xhci: Fix invalid pointer dereference in Etron workaround
    22Monitor
  • Later →CVE-2025-37822May 8, 2025 · riscv: uprobes: Add missing fence.i after building the XOL buffer
    31Monitor

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 Linux5b83d30c63f9964acb1bc63eb8e670b9e0d2c240Vendor (CNA)
Linux Linuxcc3628dcd851ddd8d418bf0c897024b4621ddc92Vendor (CNA)
Linux Linuxcefd8a2e2de46209ce66e6d30c237eb59b6c5bfaVendor (CNA)
Linux Linuxd6a9c4e6f9b3ec3ad98468c950ad214af8a2efb9Vendor (CNA)
Linux Linuxeefccd889df3b49d92e7349d94c4aa7e1ba19f6cVendor (CNA)
cbl2 kernel 5.15.202.1-1 on CBL-Mariner 2.0Release NotesMicrosoft (MSRC)
debian:linux6.1.137-1 · 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.

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

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-476 · NULL Pointer Dereference

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

nvd-primary

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 (5 more)

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

All records