Skip to content
Noroxi
NVD / CVE Program· CNA Linux

CVE-2026-23140: bpf, test_run: Subtract size of xdp_frame from allowed metadata size

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: 0.14% (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.
  • Fixed version: Linux Linux 31e37f44b60679d90b9f999c91371b15291be8e0, 6447e697cfa8a43a8e491cb81bcc390d0f28f8ba, 7c81ad5e580bd8441f8a521a8d34824ce6582ae5.

Low priority for now. Upgrade to Linux Linux 31e37f44b60679d90b9f999c91371b15291be8e0, 6447e697cfa8a43a8e491cb81bcc390d0f28f8ba, 7c81ad5e580bd8441f8a521a8d34824ce6582ae5 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: bpf, test_run: Subtract size of xdp_frame from allowed metadata size The xdp_frame structure takes up part of the XDP frame headroom, limiting the size of the metadata. However, in bpf_test_run, we don't take this into account, which makes it possible for userspace to supply a metadata size that is too large (taking up the entire headroom). If userspace supplies such a large metadata size in live packet mode, the xdp_update_frame_from_buff() call in xdp_test_run_init_page() call will fail, after which packet transmission proceeds with an uninitialised frame structure, leading to the usual Bad Stuff. The commit in the Fixes tag fixed a related bug where the second check in xdp_update_frame_from_buff() could fail, but did not add any additional constraints on the metadata size. Complete the fix by adding an additional check on the metadata size. Reorder the checks slightly to make the logic clearer and add a comment.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Feb 14, 2026
Updated
Nov 5, 2026
EPSS
0.1% · 3th percentile
CWE
—

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 · 0.1%

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

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

Follow CVE-2026-23140

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 instantly.

Your free account also gets you

Running WordPress? Scan your site free with WP Lens

  • Stack 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 (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

Running WordPress? Scan your site free with WP Lens

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.

VendorProduct
linuxlinux kernel

Affected versions

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

  • linux linux kernel5.18 and later · before 6.1.161
  • linux linux kernel6.2 and later · before 6.6.121
  • linux linux kernel6.7 and later · before 6.12.66
  • linux linux kernel6.13 and later · before 6.18.6
  • linux linux kernel6.19

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

    • 5.18affected
    • b6f1f780b3932ae497ed85e79bc8a1e513883624 and later · before e7440935063949d6f2c10f7328d960d0ff4bce90affected · git
    • b6f1f780b3932ae497ed85e79bc8a1e513883624 and later · before 7c81ad5e580bd8441f8a521a8d34824ce6582ae5affected · git
    • b6f1f780b3932ae497ed85e79bc8a1e513883624 and later · before 6447e697cfa8a43a8e491cb81bcc390d0f28f8baaffected · git
    • b6f1f780b3932ae497ed85e79bc8a1e513883624 and later · before 31e37f44b60679d90b9f999c91371b15291be8e0affected · git
    • b6f1f780b3932ae497ed85e79bc8a1e513883624 and later · before e558cca217790286e799a8baacd1610bda31b261affected · git
    • before 5.18not affected · semver
    • 6.1.161 and later · up to and including 6.1.*not affected · semver
    • 6.6.121 and later · up to and including 6.6.*not affected · semver
    • 6.12.66 and later · up to and including 6.12.*not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.162-16.1.162-1
Debian:13linuxbefore 6.12.69-16.12.69-1
Debian:14linuxbefore 6.18.8-16.18.8-1
openSUSE:Leap 16.0dtb-aarch64before 6.12.0-160000.28.16.12.0-160000.28.1
openSUSE:Leap 16.0kernel-64kbbefore 6.12.0-160000.28.16.12.0-160000.28.1
openSUSE:Leap 16.0kernel-azurebefore 6.12.0-160000.28.16.12.0-160000.28.1
openSUSE:Leap 16.0kernel-defaultbefore 6.12.0-160000.28.16.12.0-160000.28.1
openSUSE:Leap 16.0kernel-default-basebefore 6.12.0-160000.27.1.160000.2.86.12.0-160000.27.1.160000.2.8
openSUSE:Leap 16.0kernel-docsbefore 6.12.0-160000.28.16.12.0-160000.28.1
openSUSE:Leap 16.0kernel-kvmsmallbefore 6.12.0-160000.28.16.12.0-160000.28.1
openSUSE:Leap 16.0kernel-obs-buildbefore 6.12.0-160000.28.16.12.0-160000.28.1
openSUSE:Leap 16.0kernel-obs-qabefore 6.12.0-160000.28.16.12.0-160000.28.1
openSUSE:Leap 16.0kernel-rtbefore 6.12.0-160000.28.16.12.0-160000.28.1
openSUSE:Leap 16.0kernel-sourcebefore 6.12.0-160000.28.16.12.0-160000.28.1
openSUSE:Leap 16.0kernel-symsbefore 6.12.0-160000.28.16.12.0-160000.28.1
openSUSE:Leap 16.0kernel-zfcpdumpbefore 6.12.0-160000.28.16.12.0-160000.28.1
SUSE:Linux Enterprise Live Patching 15 SP7kernel-livepatch-SLE15-SP7-RT_Update_11before 1-150700.1.3.11-150700.1.3.1
SUSE:Linux Micro 6.1kernel-rtbefore 6.4.0-41.16.4.0-41.1
SUSE:Linux Micro 6.1kernel-source-rtbefore 6.4.0-41.16.4.0-41.1
SUSE:Linux Micro 6.2gdk-pixbufbefore 2.42.12-160000.4.12.42.12-160000.4.1
SUSE:Linux Micro 6.2kernel-64kbbefore 6.12.0-160000.28.16.12.0-160000.28.1
SUSE:Linux Micro 6.2kernel-defaultbefore 6.12.0-160000.28.16.12.0-160000.28.1
SUSE:Linux Micro 6.2kernel-default-basebefore 6.12.0-160000.27.1.160000.2.86.12.0-160000.27.1.160000.2.8
SUSE:Linux Micro 6.2kernel-rtbefore 6.12.0-160000.28.16.12.0-160000.28.1

+6

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-2026-23137Feb 14, 2026 · of: unittest: Fix memory leak in unittest_data_add()
    22Monitor
  • ← EarlierCVE-2026-23138Feb 14, 2026 · tracing: Add recursion protection in kernel stack trace recording
    22Monitor
  • Later →CVE-2026-23141Feb 14, 2026 · btrfs: send: check for inline extents in range_is_hole_in_parent()
    22Monitor

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 Linux31e37f44b60679d90b9f999c91371b15291be8e0Vendor (CNA)
Linux Linux6447e697cfa8a43a8e491cb81bcc390d0f28f8baVendor (CNA)
Linux Linux7c81ad5e580bd8441f8a521a8d34824ce6582ae5Vendor (CNA)
Linux Linuxe558cca217790286e799a8baacd1610bda31b261Vendor (CNA)
Linux Linuxe7440935063949d6f2c10f7328d960d0ff4bce90Vendor (CNA)
debian:linux6.1.162-1 · Debian:12Package registry (OSV)
opensuse:dtb-aarch646.12.0-160000.28.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-64kb6.12.0-160000.28.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-azure6.12.0-160000.28.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-default6.12.0-160000.28.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-default-base6.12.0-160000.27.1.160000.2.8 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-docs6.12.0-160000.28.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-kvmsmall6.12.0-160000.28.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-obs-build6.12.0-160000.28.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-obs-qa6.12.0-160000.28.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-rt6.12.0-160000.28.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-source6.12.0-160000.28.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-syms6.12.0-160000.28.1 · openSUSE:Leap 16.0Package registry (OSV)
suse:gdk-pixbuf2.42.12-160000.4.1 · SUSE:Linux Micro 6.2Package registry (OSV)
suse:kernel-64kb6.12.0-160000.28.1 · SUSE:Linux Micro 6.2Package registry (OSV)
suse:kernel-default6.12.0-160000.28.1 · SUSE:Linux Micro 6.2Package registry (OSV)
suse:kernel-default-base6.12.0-160000.27.1.160000.2.8 · SUSE:Linux Micro 6.2Package registry (OSV)
suse:kernel-livepatch-SLE15-SP7-RT_Update_111-150700.1.3.1 · SUSE:Linux Enterprise Live Patching 15 SP7Package registry (OSV)
suse:kernel-obs-build6.12.0-160000.28.1 · SUSE:Linux Micro Extras 6.2Package registry (OSV)
suse:kernel-rt6.4.0-150700.7.37.2 · SUSE:Real Time Module 15 SP7Package registry (OSV)
suse:kernel-source6.12.0-160000.28.1 · SUSE:Linux Micro 6.2Package registry (OSV)
suse:kernel-source-rt6.4.0-150700.7.37.2 · SUSE:Real Time Module 15 SP7Package registry (OSV)
suse:kernel-syms6.12.0-160000.28.1 · SUSE:Linux Micro Extras 6.2Package registry (OSV)
suse:kernel-syms-rt6.4.0-150700.7.37.1 · SUSE:Real Time Module 15 SP7Package 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.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

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)

—

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.

Change log

  1. SSVC exploitation— → none
  2. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (4 more)

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

All records