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NVD / CVE Program· CNA Linux

CVE-2024-47737: nfsd: call cache_put if xdr_reserve_space returns NULL

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: 0.27% (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 3e8081ebff12bec1347deaceb6bce0765cce54df, 81821617312988096f5deccf0f7da6f888e98056, 8d0765f86135e27f0bb5c950c136495719b4c834; Azure Linux 3.0 ARM 6.6.56.1-5; Azure Linux 3.0 x64 6.6.56.1-5.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 3e8081ebff12bec1347deaceb6bce0765cce54df, 81821617312988096f5deccf0f7da6f888e98056, 8d0765f86135e27f0bb5c950c136495719b4c834; Azure Linux 3.0 ARM 6.6.56.1-5; Azure Linux 3.0 x64 6.6.56.1-5 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: nfsd: call cache_put if xdr_reserve_space returns NULL If not enough buffer space available, but idmap_lookup has triggered lookup_fn which calls cache_get and returns successfully. Then we missed to call cache_put here which pairs with cache_get. Reviwed-by: Jeff Layton <jlayton@kernel.org>

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Oct 21, 2024
Updated
Oct 15, 2026
EPSS
0.2% · 19th 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
  • 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-2024-47737

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 kernel3.16 and later · before 5.10.227
  • linux linux kernel5.11 and later · before 5.15.168
  • linux linux kernel5.16 and later · before 6.1.113
  • linux linux kernel6.2 and later · before 6.6.54
  • linux linux kernel6.7 and later · before 6.10.13
  • linux linux kernel6.11 and later · before 6.11.2

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

    • 3.16affected
    • ddd1ea56367202f6c99135cd59de7a97af4c4ffd and later · before 3e8081ebff12bec1347deaceb6bce0765cce54dfaffected · git
    • ddd1ea56367202f6c99135cd59de7a97af4c4ffd and later · before c6b16e700cf4d959af524bd9d3978407ff7ce462affected · git
    • ddd1ea56367202f6c99135cd59de7a97af4c4ffd and later · before 9f03f0016ff797932551881c7e06ae50e9c39134affected · git
    • ddd1ea56367202f6c99135cd59de7a97af4c4ffd and later · before 9803ab882d565a8fb2dde5999d98866d1c499dfdaffected · git
    • ddd1ea56367202f6c99135cd59de7a97af4c4ffd and later · before 81821617312988096f5deccf0f7da6f888e98056affected · git
    • ddd1ea56367202f6c99135cd59de7a97af4c4ffd and later · before a1afbbb5276f943ad7173d0b4c626b8c75a260daaffected · git
    • ddd1ea56367202f6c99135cd59de7a97af4c4ffd and later · before e32ee6a61041925d1a05c14d10352dcfce9ef029affected · git
    • ddd1ea56367202f6c99135cd59de7a97af4c4ffd and later · before 8d0765f86135e27f0bb5c950c136495719b4c834affected · git
    • ddd1ea56367202f6c99135cd59de7a97af4c4ffd and later · before d078cbf5c38de83bc31f83c47dcd2184c04a50c7affected · git

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.115-16.1.115-1
Debian:13linuxbefore 6.11.2-16.11.2-1

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-2024-47735Oct 21, 2024 · RDMA/hns: Fix spin_unlock_irqrestore() called with IRQs enabled
    22Monitor
  • ← EarlierCVE-2024-47736Oct 21, 2024 · erofs: handle overlapped pclusters out of crafted images properly
    22Monitor
  • Later →CVE-2024-47747Oct 21, 2024 · net: seeq: Fix use after free vulnerability in ether3 Driver Due to Race Condition
    28Monitor

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 Linux3e8081ebff12bec1347deaceb6bce0765cce54dfVendor (CNA)
Linux Linux81821617312988096f5deccf0f7da6f888e98056Vendor (CNA)
Linux Linux8d0765f86135e27f0bb5c950c136495719b4c834Vendor (CNA)
Linux Linux9803ab882d565a8fb2dde5999d98866d1c499dfdVendor (CNA)
Linux Linux9f03f0016ff797932551881c7e06ae50e9c39134Vendor (CNA)
Linux Linuxa1afbbb5276f943ad7173d0b4c626b8c75a260daVendor (CNA)
Linux Linuxc6b16e700cf4d959af524bd9d3978407ff7ce462Vendor (CNA)
Linux Linuxd078cbf5c38de83bc31f83c47dcd2184c04a50c7Vendor (CNA)
Linux Linuxe32ee6a61041925d1a05c14d10352dcfce9ef029Vendor (CNA)
Azure Linux 3.0 ARM6.6.56.1-5 · kernelMicrosoft (MSRC)
Azure Linux 3.0 x646.6.56.1-5 · kernelMicrosoft (MSRC)
debian:linux6.1.115-1 · 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)

CWE-476 · NULL Pointer Dereference

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 (13 more)

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

All records