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CVE-2026-72041· NVD / CVE Program· CNA Linux

espintcp: use sk_msg_free_partial to fix partial send

Noroxi assessment

Priority: Monitor (action score 39/100)

  • 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: 0.75% (FIRST EPSS); higher than 54.3% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. 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 007800408002d871f5699bdb944f985896730b8f, 14c0b42c8a2cd9b5361bbff45b52f69c62c6a286, 4ea8c051b4bd7feec7749a980f2f70e1782b84d7.

Low priority for now. Upgrade to Linux Linux 007800408002d871f5699bdb944f985896730b8f, 14c0b42c8a2cd9b5361bbff45b52f69c62c6a286, 4ea8c051b4bd7feec7749a980f2f70e1782b84d7 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: espintcp: use sk_msg_free_partial to fix partial send sk_msg_free_partial() ensures consistency of the skmsg at every iteration, without having to manually handle uncharges and offsets. This simplifies the code, and fixes some bugs in skmsg accounting when we don't send the full contents.

CriticalCVSS 9.8 · v3.1—No exploit Fix available
Published
Aug 15, 2026
Updated
Oct 19, 2026
EPSS
0.7% · 54th percentile

Report tools

JSON

Action score

39

Monitor

Low priority for now.

CVSS
39 / 40 · 9.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.7%

CISA SSVC decision

Exploitation
none
Automatable
yes
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · Linux
9.8
NVD has not scored this yet; the score shown is the CNA’s.

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-2026-72041

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

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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

    • 5.6affected
    • e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 and later · before 518dcb84b997dff461800b079e5f2596389f766aaffected · git
    • e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 and later · before 4ea8c051b4bd7feec7749a980f2f70e1782b84d7affected · git
    • e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 and later · before a977f78adce40b39d90d9567e7987bb110102810affected · git
    • e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 and later · before 54d73f18f8919735f4d04d6f43374f75756c0180affected · git
    • e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 and later · before 14c0b42c8a2cd9b5361bbff45b52f69c62c6a286affected · git
    • e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 and later · before a66d45e0ce6d73cd79962d422388e61bfaf0cb50affected · git
    • e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 and later · before a338ce41bc933d8f74c39d9b3b6f1d8ca53d9714affected · git
    • e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 and later · before 007800408002d871f5699bdb944f985896730b8faffected · git
    • before 5.6not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.187-16.1.187-1
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-2026-72035Aug 15, 2026 · net/sched: sch_taprio: Replace direct dequeue call with peek and qdisc_dequeue_peeked
    32Monitor
  • ← EarlierCVE-2026-72036Aug 15, 2026 · net/sched: sch_multiq: Replace direct dequeue call with peek and qdisc_dequeue_peeked
    31Monitor
  • Later →CVE-2026-72045Aug 15, 2026 · octeontx2-af: cn10k: restrict VF LMTLINE sharing to its own PF
    35Monitor

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 Linux007800408002d871f5699bdb944f985896730b8fVendor (CNA)
Linux Linux14c0b42c8a2cd9b5361bbff45b52f69c62c6a286Vendor (CNA)
Linux Linux4ea8c051b4bd7feec7749a980f2f70e1782b84d7Vendor (CNA)
Linux Linux518dcb84b997dff461800b079e5f2596389f766aVendor (CNA)
Linux Linux54d73f18f8919735f4d04d6f43374f75756c0180Vendor (CNA)
Linux Linuxa338ce41bc933d8f74c39d9b3b6f1d8ca53d9714Vendor (CNA)
Linux Linuxa66d45e0ce6d73cd79962d422388e61bfaf0cb50Vendor (CNA)
Linux Linuxa977f78adce40b39d90d9567e7987bb110102810Vendor (CNA)
debian:linux6.1.187-1 · 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+1% in 7 days

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

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

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-664 · Improper Control of a Resource Through its Lifetime

CVSS vector

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

nvd-secondary

Attack context

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

Change log

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

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

References

Show all references (7 more)

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

All records