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CVE Record

CVE-2024-57927: nfs: Fix oops in nfs_netfs_init_request() when copying to cache

In the Linux kernel, the following vulnerability has been resolved: nfs: Fix oops in nfs_netfs_init_request() when copying to cache When netfslib wants to copy some data that has just been read on behalf of nfs, it creates a new write request and calls nfs_netfs_init_request() to initialise it, but with a NULL file pointer. This causes nfs_file_open_context() to oops - however, we don't actually need the nfs context as we're only going to write to the cache. Fix this by just returning if we aren't given a file pointer and emit a warning if the request was for something other than copy-to-cache. Further, fix nfs_netfs_free_request() so that it doesn't try to free the context if the pointer is NULL.

MediumCVSS 5.5Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

This is a Linux kernel NFS availability bug. Under affected conditions, a local low-privileged user could cause a kernel oops when NFS data is copied into cache. The business impact is service interruption, not data theft or privilege escalation based on the supplied sources.

Executive priority

Schedule remediation through normal kernel patching, with higher priority for production systems depending on NFS. Emergency action is not supported by the supplied evidence, but downtime risk justifies timely patching.

Technical view

netfslib can create a cache write request for NFS with a NULL file pointer. nfs_netfs_init_request() then calls nfs_file_open_context(), causing a NULL pointer dereference. The fix skips context setup when no file pointer exists for copy-to-cache and avoids freeing a NULL context.

Likely exposure

Exposure is most relevant to Linux systems running affected kernel versions in the 6.12 and 6.13 range and using NFS cache-related paths. The CVSS vector requires local access with low privileges and indicates high availability impact only.

Exploitation context

The supplied bundle does not show CISA KEV listing or any cited active exploitation. Treat this as a local denial-of-service risk until vendor or distribution advisories provide more operational detail.

Researcher notes

This is CWE-476 in the NFS/netfs cache request path. The authoritative evidence is the CVE text and Linux stable commits. The supplied data does not establish a remote attack path, exploit availability, or affected distribution package versions.

Mitigation direction

  • Update to a vendor kernel containing the referenced stable fixes.
  • Prioritize NFS client systems using affected 6.12 or 6.13 kernels.
  • Check distribution advisories for backported fixes and package names.
  • If patching is delayed, review vendor guidance for NFS cache workarounds.

Validation and detection

  • Inventory Linux kernel versions across NFS client systems.
  • Confirm whether deployed kernels include commits 13a07cc81e2d or 86ad1a58f6a9.
  • Review crash logs for kernel oops events involving nfs_netfs_init_request().
  • Verify patched systems no longer match affected vendor advisories.
Prepared
Confidence
high
Sources
4

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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ATT&CK lookup starting points

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cwe · low confidence lookup

CWE-476: Exact CWE lookup

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cve · low confidence lookup

CVE-2024-57927 mapping review

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
5.5 (3.1)
Known Exploited
No
Published

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

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
3Timeline events
1ADP providers
3Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: noTechnical Impact: partial

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
5.5CVSS 3.1MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H1.83.6CISA-ADP

Vulnerability scoring details

Base CVSS 3.1 score

5.5Medium
CVSS 3.1 vector shape for CVE-2024-57927Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
cvssV3_1other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinuxee4cdf7ba857a894ad1650d6ab77669cbbfa329e, ee4cdf7ba857a894ad1650d6ab77669cbbfa329eunaffected
LinuxLinux6.12, 0, 6.12.10, 6.13affected
Weakness

CWE details

CWE-476

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.