CVE-2026-98431Hinoki check available

Hang via inverted RDMA memory-mapping lock order

Published Oct 14, 2026 · Updated Oct 14, 2026

Deadlock in Linux 6.13 RDMA/uverbs allows local users to hang kernel operations during concurrent mapping and disassociation. The mmap and fork paths acquire mmap_lock before disassociation_lock, while uverbs_user_mmap_disassociate() acquires them in reverse order. Reachability requires RDMA mappings and overlapping device disassociation, such as during removal or reload; the disclosed consequence is blocked operations, not data disclosure or code execution.

CVSS severityUnavailable
Unscored
EPSS probability0.20%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Deadlock in Linux 6.13 RDMA/uverbs allows local users to hang kernel operations during concurrent mapping and disassociation. The mmap and fork paths acquire mmap_lock before disassociation_lock, while uverbs_user_mmap_disassociate() acquires them in reverse order. Reachability requires RDMA mappings and overlapping device disassociation, such as during removal or reload; the disclosed consequence is blocked operations, not data disclosure or code execution.

The record

CVE
CVE-2026-98431
Published
Oct 14, 2026
Updated
Oct 14, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Oct 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 14, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=0598914a950ddfa694f410e482453cdbb9265515
  2. Affected versionversion=51976c6cd786151b6a1bdf8b8b3334beac0ba99c <426f54f20b79c5b164a0472ad3f6ba36afcd08c6
  3. Affected versionversion=51976c6cd786151b6a1bdf8b8b3334beac0ba99c <a44a3f175eaee7e5aeb6a8fed381c4a0d5f49236
  4. Affected versionversion=6.11.11 <6.12
  5. Affected versionversion=6.12.2 <6.13
  6. Affected versionversion=6.13
  7. Affected versionversion=86092a4e46d161d24f8106df082e24b8efe87382

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=0598914a950ddfa694f410e482453cdbb9265515; version=51976c6cd786151b6a1bdf8b8b3334beac0ba99c <426f54f20b79c5b164a0472ad3f6ba36afcd08c6; version=51976c6cd786151b6a1bdf8b8b3334beac0ba99c <a44a3f175eaee7e5aeb6a8fed381c4a0d5f49236; version=6.11.11 <6.12; version=6.12.2 <6.13; version=6.13; version=86092a4e46d161d24f8106df082e24b8efe87382

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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