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NVD / CVE Program· CNA Linux

CVE-2024-44965: x86/mm: Fix pti_clone_pgtable() alignment assumption

Noroxi assessment

Priority: Monitor (action score 22/100)

  • 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: 0.22% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 18da1b27ce16a14a9b636af9232acb4fb24f4c9e, 25a727233a40a9b33370eec9f0cad67d8fd312f8, 41e71dbb0e0a0fe214545fe64af031303a08524c.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 18da1b27ce16a14a9b636af9232acb4fb24f4c9e, 25a727233a40a9b33370eec9f0cad67d8fd312f8, 41e71dbb0e0a0fe214545fe64af031303a08524c 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: x86/mm: Fix pti_clone_pgtable() alignment assumption Guenter reported dodgy crashes on an i386-nosmp build using GCC-11 that had the form of endless traps until entry stack exhaust and then #DF from the stack guard. It turned out that pti_clone_pgtable() had alignment assumptions on the start address, notably it hard assumes start is PMD aligned. This is true on x86_64, but very much not true on i386. These assumptions can cause the end condition to malfunction, leading to a 'short' clone. Guess what happens when the user mapping has a short copy of the entry text? Use the correct increment form for addr to avoid alignment assumptions.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Sep 4, 2024
Updated
Oct 15, 2026
EPSS
0.2% · 12th percentile
CWE
—

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

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-2024-44965

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.

VendorProduct
linuxlinux kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernel4.19 and later · before 4.19.320
  • linux linux kernel4.20 and later · before 5.4.282
  • linux linux kernel5.5 and later · before 5.10.224
  • linux linux kernel5.11 and later · before 5.15.165
  • linux linux kernel5.16 and later · before 6.1.105
  • linux linux kernel6.2 and later · before 6.6.46
  • linux linux kernel6.7 and later · before 6.10.5
  • linux linux kernel6.11

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

    • 4.19affected
    • 16a3fe634f6a568c6234b8747e5d50487fed3526 and later · before 18da1b27ce16a14a9b636af9232acb4fb24f4c9eaffected · git
    • 16a3fe634f6a568c6234b8747e5d50487fed3526 and later · before 25a727233a40a9b33370eec9f0cad67d8fd312f8affected · git
    • 16a3fe634f6a568c6234b8747e5d50487fed3526 and later · before d00c9b4bbc442d99e1dafbdfdab848bc1ead73f6affected · git
    • 16a3fe634f6a568c6234b8747e5d50487fed3526 and later · before 4d143ae782009b43b4f366402e5c37f59d4e4346affected · git
    • 16a3fe634f6a568c6234b8747e5d50487fed3526 and later · before 5c580c1050bcbc15c3e78090859d798dcf8c9763affected · git
    • 16a3fe634f6a568c6234b8747e5d50487fed3526 and later · before ca07aab70dd3b5e7fddb62d7a6ecd7a7d6d0b2edaffected · git
    • 16a3fe634f6a568c6234b8747e5d50487fed3526 and later · before df3eecb5496f87263d171b254ca6e2758ab3c35caffected · git
    • 16a3fe634f6a568c6234b8747e5d50487fed3526 and later · before 41e71dbb0e0a0fe214545fe64af031303a08524caffected · git
    • before 4.19not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.106-16.1.106-1
Debian:13linuxbefore 6.10.6-16.10.6-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now

Published before and after this one in the same product

  • ← EarlierCVE-2024-44951Sep 4, 2024 · serial: sc16is7xx: fix TX fifo corruption
    31Monitor
  • ← EarlierCVE-2024-44960Sep 4, 2024 · usb: gadget: core: Check for unset descriptor
    22Monitor
  • Later →CVE-2024-44986Sep 4, 2024 · ipv6: fix possible UAF in ip6_finish_output2()
    31Monitor

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 Linux18da1b27ce16a14a9b636af9232acb4fb24f4c9eVendor (CNA)
Linux Linux25a727233a40a9b33370eec9f0cad67d8fd312f8Vendor (CNA)
Linux Linux41e71dbb0e0a0fe214545fe64af031303a08524cVendor (CNA)
Linux Linux4d143ae782009b43b4f366402e5c37f59d4e4346Vendor (CNA)
Linux Linux5c580c1050bcbc15c3e78090859d798dcf8c9763Vendor (CNA)
Linux Linuxca07aab70dd3b5e7fddb62d7a6ecd7a7d6d0b2edVendor (CNA)
Linux Linuxd00c9b4bbc442d99e1dafbdfdab848bc1ead73f6Vendor (CNA)
Linux Linuxdf3eecb5496f87263d171b254ca6e2758ab3c35cVendor (CNA)
debian:linux6.1.106-1 · 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).

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

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

—

CVSS vector

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

nvd-primary

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 (11 more)

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

All records