Skip to content
Noroxi
NVD / CVE Program· CNA Linux

CVE-2026-93239: arm64: mm: Fix the lockless page-table walk in show_pte()

Noroxi assessment

Priority: Monitor (action score 0/100)

  • 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: 0.21% (FIRST EPSS).
  • Fixed version: Linux Linux 08d931a0a850ad16a64f2cd23a19f40795cdbdf7, 0f05d95b99164a9ccc4cf4a4920e0ff0228138ad, 68cbd70795dd8c06e7ccdc4eb0b74c5b180076c3; azl3 kernel 6.6.150.1-1 on Azure Linux 3.0 6.6.157.1-1.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 08d931a0a850ad16a64f2cd23a19f40795cdbdf7, 0f05d95b99164a9ccc4cf4a4920e0ff0228138ad, 68cbd70795dd8c06e7ccdc4eb0b74c5b180076c3; azl3 kernel 6.6.150.1-1 on Azure Linux 3.0 6.6.157.1-1 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: arm64: mm: Fix the lockless page-table walk in show_pte() show_pte() walks page tables locklessly and can run with interrupts enabled. A concurrent teardown can free a table page while it is being walked. It can also clear a parent entry after show_pte() checked it; the regular pXd_offset() helpers then reread the cleared entry and can derive a bogus lower-level pointer and fault again. Use the lockless offset helpers with the saved parent entries, as gup_fast() does, and pass the saved PMD to pte_offset_map(). For task page tables, arm64 selects MMU_GATHER_RCU_TABLE_FREE. Disable local interrupts around the walk to hold off RCU-deferred table frees and block the tlb_remove_table_sync_one() IPI until the walk is finished. Place the IRQ guard after the header print. This does not make the output a consistent snapshot, but prevents the task page-table walk from dereferencing a released table page or deriving a pointer from a different parent value.

—No exploit Fix available
Published
Sep 24, 2026
Updated
Oct 30, 2026
EPSS
0.2% · 12th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

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-2026-93239

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.

—

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

    • 3.7affected
    • 1d18c47c735e8adfe531fc41fae31e98f86b68fe and later · before b8f06b73ad146d84a33c124563c93eeef4f5b674affected · git
    • 1d18c47c735e8adfe531fc41fae31e98f86b68fe and later · before b3535b6cb2c48f97b8c3378eb9ea12538425bf14affected · git
    • 1d18c47c735e8adfe531fc41fae31e98f86b68fe and later · before e1b06278a7e241da0cd3187871e67255f956d184affected · git
    • 1d18c47c735e8adfe531fc41fae31e98f86b68fe and later · before 08d931a0a850ad16a64f2cd23a19f40795cdbdf7affected · git
    • 1d18c47c735e8adfe531fc41fae31e98f86b68fe and later · before b28fe65a36b8209b6adcf2722c7ce974cf9ac8d1affected · git
    • 1d18c47c735e8adfe531fc41fae31e98f86b68fe and later · before 68cbd70795dd8c06e7ccdc4eb0b74c5b180076c3affected · git
    • 1d18c47c735e8adfe531fc41fae31e98f86b68fe and later · before 0f05d95b99164a9ccc4cf4a4920e0ff0228138adaffected · git
    • 1d18c47c735e8adfe531fc41fae31e98f86b68fe and later · before a77644d009dece1104b6fcc6e322b0e4503db0d6affected · git
    • before 3.7not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxfrom 0—
Debian:12linux-6.12before 6.12.111-1~deb12u16.12.111-1~deb12u1
Debian:13linuxbefore 6.12.111-16.12.111-1
Debian:14linuxbefore 7.2.6-17.2.6-1

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-2026-93237Sep 24, 2026 · LoongArch: Add DIRECT_MAP_PHYSMEM_END definition
    31Monitor
  • ← EarlierCVE-2026-93238Sep 24, 2026 · s390/vfio-ap: fix potential use of uninitialized apm_filtered bitmap
    0Monitor
  • Later →CVE-2026-93240Sep 24, 2026 · memcg: make the v1 soft limit knob inert
    0Monitor

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 Linux08d931a0a850ad16a64f2cd23a19f40795cdbdf7Vendor (CNA)
Linux Linux0f05d95b99164a9ccc4cf4a4920e0ff0228138adVendor (CNA)
Linux Linux68cbd70795dd8c06e7ccdc4eb0b74c5b180076c3Vendor (CNA)
Linux Linuxa77644d009dece1104b6fcc6e322b0e4503db0d6Vendor (CNA)
Linux Linuxb28fe65a36b8209b6adcf2722c7ce974cf9ac8d1Vendor (CNA)
Linux Linuxb3535b6cb2c48f97b8c3378eb9ea12538425bf14Vendor (CNA)
Linux Linuxb8f06b73ad146d84a33c124563c93eeef4f5b674Vendor (CNA)
Linux Linuxe1b06278a7e241da0cd3187871e67255f956d184Vendor (CNA)
azl3 kernel 6.6.150.1-1 on Azure Linux 3.06.6.157.1-1 · Release NotesMicrosoft (MSRC)
debian:linux6.12.111-1 · Debian:13Package registry (OSV)
debian:linux-6.126.12.111-1~deb12u1 · 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).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Technical details

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

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. 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