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NVD / CVE Program· CNA Linux

CVE-2024-14027: xattr: switch to CLASS(fd)

Noroxi assessment

Priority: Monitor (action score 22/100)

  • Public proof-of-concept code exists (GitHub); there is no record of exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.23% (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 6.11, 6.6.133, 9a3a2ae5efbbcaed37551218abed94e23c537157; azl3 kernel 6.6.126.1-1 on Azure Linux 3.0 6.6.126.1-1.

Low priority for now. Upgrade to Linux Linux 6.11, 6.6.133, 9a3a2ae5efbbcaed37551218abed94e23c537157; azl3 kernel 6.6.126.1-1 on Azure Linux 3.0 6.6.126.1-1 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: fs/xattr: missing fdput() in fremovexattr error path In the Linux kernel, the fremovexattr() syscall calls fdget() to acquire a file reference but returns early without calling fdput() when strncpy_from_user() fails on the name argument. In multi-threaded processes where fdget() takes the slow path, this permanently leaks one file reference per call, pinning the struct file and associated kernel objects in memory. An unprivileged local user can exploit this to cause kernel memory exhaustion. The issue was inadvertently fixed by commit a71874379ec8 ("xattr: switch to CLASS(fd)").

MediumCVSS 5.5 · v3.1—Proof of concept Fix available
Published
Mar 9, 2026
Updated
Nov 5, 2026
EPSS
0.2% · 14th percentile

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
  • Proof of concept exists, no weaponized module
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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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 kernel6.6.51 and later · before 6.6.133
  • linux linux kernel6.10.10 and later · before 6.12.77

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

    • 8d5863cb33aa424fc27115ee945ad6b96ae2facb, 6.11affected
    • c03185f4a23e7f89d84c9981091770e876e64480 and later · before 9a3a2ae5efbbcaed37551218abed94e23c537157affected · git
    • c3a5e3e872f3688ae0dc57bb78ca633921d96a91 and later · before d151b94967c8247005435b63fc60f8f4baa320daaffected · git
    • c3a5e3e872f3688ae0dc57bb78ca633921d96a91 and later · before a71874379ec8c6e788a61d71b3ad014a8d9a5c08affected · git
    • 6.6.51 and later · before 6.6.133affected · semver
    • 6.10.10 and later · before 6.11affected · semver
    • before 6.11not affected · semver
    • 6.6.133 and later · up to and including 6.6.*not affected · semver
    • 6.12.77 and later · up to and including 6.12.*not affected · semver
    • 6.13 and laternot affected · original_commit_for_fix

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:13linuxbefore 6.12.85-16.12.85-1
Debian:14linuxbefore 6.16.3-16.16.3-1
SUSE:Linux Micro Extras 6.2kernel-obs-buildbefore 6.12.0-160000.33.16.12.0-160000.33.1
SUSE:Linux Micro Extras 6.2kernel-symsbefore 6.12.0-160000.33.16.12.0-160000.33.1

Same product

linux: all records

Other highest-scoring records for the same primary product.

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    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-2025-71238Mar 4, 2026 · scsi: qla2xxx: Fix bsg_done() causing double free
    31Monitor
  • ← EarlierCVE-2026-23237Mar 4, 2026 · platform/x86: classmate-laptop: Add missing NULL pointer checks
    22Monitor
  • Later →CVE-2026-3843Mar 10, 2026 · SQL Injection in Nefteprodukttekhnika BUK TS-G Allows Remote Code Execution
    37Monitor

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 Linux6.11Vendor (CNA)
Linux Linux6.6.133Vendor (CNA)
Linux Linux9a3a2ae5efbbcaed37551218abed94e23c537157Vendor (CNA)
Linux Linuxa71874379ec8c6e788a61d71b3ad014a8d9a5c08Vendor (CNA)
Linux Linuxd151b94967c8247005435b63fc60f8f4baa320daVendor (CNA)
azl3 kernel 6.6.126.1-1 on Azure Linux 3.06.6.126.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
debian:linux6.12.85-1 · Debian:13Package registry (OSV)
suse:kernel-obs-build6.12.0-160000.33.1 · SUSE:Linux Micro Extras 6.2Package registry (OSV)
suse:kernel-syms6.12.0-160000.33.1 · SUSE:Linux Micro Extras 6.2Package registry (OSV)

Exploit status

Proof of concept available

A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.

Evidence

  • Proof-of-concept repository on GitHub ×1

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Proof-of-concept repository on GitHubstars:62026-03-13

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.

  1. Published
  2. First PoC+3 d
  3. TodayNov 11, 2026+246 d

No history yet (it accumulates with the daily EPSS job).

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.
  • 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)

CWE-401 · Missing Release of Memory after Effective Lifetime

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. SSVC exploitation— → none
  2. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (2 more)

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

All records