High

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

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.

Published Aug 15, 2026 · Updated Oct 15, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP · CNA: Linux

Low

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.

How the score was calculated

Technical severity (high)+6

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Not confirmed

Not in CISA KEV — an absence of record, not proof it is unexploited.

EPSS FIRST

—

No EPSS score.

Affects

Linux

CVSS base

8.4

High · 2 source(s)

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (Linux Linux).
No fix documented in the sources: reduce exposure and monitor the vendor advisory.
Search available logs for exploit probes, errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
Linux	Linux	≥ 960b08dd36de1e341e3eb43d1c547513e338f4f8 and < 3665e644ea081c4624a1637023b0de3b29f4ae04≥ ad9d24c9429e2159d1e279dc3a83191ccb4daf1d and < b609f7f46916c6b05585ca82455077198a23770f≥ ad9d24c9429e2159d1e279dc3a83191ccb4daf1d and < 242408b5b763c01288adf3113cbce84378a76e1a≥ ad9d24c9429e2159d1e279dc3a83191ccb4daf1d and < d0597074e99731fdad5593e4f6d056a3866f2cab≥ ad9d24c9429e2159d1e279dc3a83191ccb4daf1d and < 689b7267f8632b4661879dc323e26ebb60978afb≥ ad9d24c9429e2159d1e279dc3a83191ccb4daf1d and < 22100a8f73d4ae4f17697dae93d4e2e1d283a6ec≥ ad9d24c9429e2159d1e279dc3a83191ccb4daf1d and < 7f72c285f6d3bf63968a0344beee8ab1b370198b≥ ad9d24c9429e2159d1e279dc3a83191ccb4daf1d and < 20054869770c7df060c5ecee3e8bbf9029c47191 and 8 more version f8111c0d7ed42ede41a3d0d393b104de0730a8a6version 26b8d10703a9be45d6097946b2b4011f7dd2c56fversion 19892ab9c9d838e2e5a7744d36e4bb8b7c3292fe≥ 5.10.46 and < 5.10.261≥ 4.19.196 and < 4.20≥ 5.4.128 and < 5.5≥ 5.12.13 and < 5.13version 5.13	Vulnerable	CVE Program (cve.org) e CISA ADP

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector

Local

Attack complexity

Low

Privileges required

None

User interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

Score	Version	Severity	Expl.	Impact	Scored by
8.4	CVSS 3.1	High	2.5	5.9	416baaa9-dc9f-4396-8d5f-8c081fb06d67 via NIST National Vulnerability Database
8.4	CVSS 3.1	High	—	—	Linux via CVE Program (cve.org) e CISA ADP

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H (score shown at the top: 416baaa9-dc9f-4396-8d5f-8c081fb06d67)

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Local/physical vector: focus on endpoint telemetry (EDR) from affected hosts.

endpoint telemetry (EDR)

Timeline

What happened to this CVE, newest first.

2026
Affected products added · linux/linux
Oct 15, 2026 · CVE Program (cve.org) e CISA ADP
Record published
Oct 15, 2026
CVSS changed · 8.4
Oct 15, 2026 · NIST National Vulnerability Database
Source status changed · → Received
Oct 15, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 15, 2026 · NIST National Vulnerability Database
CVE published
Aug 15, 2026 · Linux

Source activity

Repeated readings are counted rather than listed.

1× Official description updated · Oct 15, 2026 – Oct 15, 2026

References

8 on the record

git.kernel.org/stable/c/3665e644ea081c4624a1637023b0de3b29f4ae04
NIST National Vulnerability Database
git.kernel.org/stable/c/7f72c285f6d3bf63968a0344beee8ab1b370198b
NIST National Vulnerability Database
git.kernel.org/stable/c/20054869770c7df060c5ecee3e8bbf9029c47191
NIST National Vulnerability Database
git.kernel.org/stable/c/22100a8f73d4ae4f17697dae93d4e2e1d283a6ec
NIST National Vulnerability Database
git.kernel.org/stable/c/242408b5b763c01288adf3113cbce84378a76e1a
NIST National Vulnerability Database
git.kernel.org/stable/c/689b7267f8632b4661879dc323e26ebb60978afb
NIST National Vulnerability Database
git.kernel.org/stable/c/b609f7f46916c6b05585ca82455077198a23770f
NIST National Vulnerability Database
git.kernel.org/stable/c/d0597074e99731fdad5593e4f6d056a3866f2cab
NIST National Vulnerability Database

Elsewhere on this site

Linux
every CVE for this vendor

Related CVEs (same products)

Critical CVE-2026-99999 ipv4: validate checksum_start before completing checksum 12h
Unknown CVE-2026-98432 ipv4: free inet_opt and ireq_opt after an RCU grace period 12h
Unknown CVE-2026-98428 ALSA: usb: 6fire: Avoid embedded URBs 1d
Unknown CVE-2026-98431 RDMA/uverbs: Fix mmap_lock/disassociation_lock circular dependency 1d
Unknown CVE-2026-98430 RDMA/efa: Keep admin queues alive while IRQ is registered 1d
Unknown CVE-2026-98429 RDMA/efa: Keep EQ resources alive while IRQ is registered 1d

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No FIRST EPSS score.
No fixed version, patch or mitigation documented.
No CISA SSVC assessment.
No CWE classification.
No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2026-72298 is "net: qrtr: fix 32-bit integer overflow in qrtr_endpoint_post()", rated High. It affects Linux (Linux); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 8.4 describes technical severity. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

Comments

Moderated technical discussion. Read the community guidelines.

No comments yet.