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NVD / CVE Program· CNA Linux

CVE-2026-72298: net: qrtr: fix 32-bit integer overflow in qrtr_endpoint_post()

Noroxi assessment

Priority: Monitor (action score 33/100)

  • 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: 0.18% (FIRST EPSS).
  • Someone with local access to the system can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 20054869770c7df060c5ecee3e8bbf9029c47191, 22100a8f73d4ae4f17697dae93d4e2e1d283a6ec, 242408b5b763c01288adf3113cbce84378a76e1a.

Low priority for now. Upgrade to Linux Linux 20054869770c7df060c5ecee3e8bbf9029c47191, 22100a8f73d4ae4f17697dae93d4e2e1d283a6ec, 242408b5b763c01288adf3113cbce84378a76e1a 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: qrtr: fix 32-bit integer overflow in qrtr_endpoint_post() qrtr_endpoint_post() validates an incoming packet with if (!size || len != ALIGN(size, 4) + hdrlen) goto err; where size comes from the wire. On 32-bit, size_t is 32 bits and ALIGN(size, 4) wraps to 0 for size >= 0xfffffffd, so the check passes and skb_put_data(skb, data + hdrlen, size) writes past the hdrlen-sized skb and oopses the kernel. 64-bit is unaffected. This is the 32-bit residual of ad9d24c9429e2 ("net: qrtr: fix OOB Read in qrtr_endpoint_post"), which fixed only the 64-bit case. Reject any size that cannot fit the buffer before the ALIGN.

HighCVSS 8.4 · v3.1—No exploit Fix available
Published
Aug 15, 2026
Updated
Oct 16, 2026
EPSS
0.1% · 8th percentile
CWE
—

Report tools

JSON

Action score

33

Monitor

Low priority for now.

CVSS
33 / 40 · 8.4 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · Linux
8.4
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-2026-72298

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

    • f8111c0d7ed42ede41a3d0d393b104de0730a8a6, 26b8d10703a9be45d6097946b2b4011f7dd2c56f, 19892ab9c9d838e2e5a7744d36e4bb8b7c3292fe, 5.13affected
    • 960b08dd36de1e341e3eb43d1c547513e338f4f8 and later · before 3665e644ea081c4624a1637023b0de3b29f4ae04affected · git
    • ad9d24c9429e2159d1e279dc3a83191ccb4daf1d and later · before b609f7f46916c6b05585ca82455077198a23770faffected · git
    • ad9d24c9429e2159d1e279dc3a83191ccb4daf1d and later · before 242408b5b763c01288adf3113cbce84378a76e1aaffected · git
    • ad9d24c9429e2159d1e279dc3a83191ccb4daf1d and later · before d0597074e99731fdad5593e4f6d056a3866f2cabaffected · git
    • ad9d24c9429e2159d1e279dc3a83191ccb4daf1d and later · before 689b7267f8632b4661879dc323e26ebb60978afbaffected · git
    • ad9d24c9429e2159d1e279dc3a83191ccb4daf1d and later · before 22100a8f73d4ae4f17697dae93d4e2e1d283a6ecaffected · git
    • ad9d24c9429e2159d1e279dc3a83191ccb4daf1d and later · before 7f72c285f6d3bf63968a0344beee8ab1b370198baffected · git
    • ad9d24c9429e2159d1e279dc3a83191ccb4daf1d and later · before 20054869770c7df060c5ecee3e8bbf9029c47191affected · git
    • 5.10.46 and later · before 5.10.261affected · 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-2026-72296Aug 15, 2026 · net: ife: require ETH_HLEN to be pullable in ife_decode()
    36Monitor
  • ← EarlierCVE-2026-72297Aug 15, 2026 · net: atm: reject out-of-range traffic classes in QoS validation
    28Monitor
  • Later →CVE-2026-72299Aug 15, 2026 · tipc: restrict socket queue dumps in enqueue tracepoints
    39Monitor

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 Linux20054869770c7df060c5ecee3e8bbf9029c47191Vendor (CNA)
Linux Linux22100a8f73d4ae4f17697dae93d4e2e1d283a6ecVendor (CNA)
Linux Linux242408b5b763c01288adf3113cbce84378a76e1aVendor (CNA)
Linux Linux3665e644ea081c4624a1637023b0de3b29f4ae04Vendor (CNA)
Linux Linux4.20Vendor (CNA)
Linux Linux5.10.261Vendor (CNA)
Linux Linux5.13Vendor (CNA)
Linux Linux5.5Vendor (CNA)
Linux Linux689b7267f8632b4661879dc323e26ebb60978afbVendor (CNA)
Linux Linux7f72c285f6d3bf63968a0344beee8ab1b370198bVendor (CNA)
Linux Linuxb609f7f46916c6b05585ca82455077198a23770fVendor (CNA)
Linux Linuxd0597074e99731fdad5593e4f6d056a3866f2cabVendor (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).

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.
  • 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
Local
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

—

CVSS vector

CVSS:3.1/AV:L/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.

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 (7 more)

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

All records