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CVE Record

CVE-2024-35805: dm snapshot: fix lockup in dm_exception_table_exit

In the Linux kernel, the following vulnerability has been resolved: dm snapshot: fix lockup in dm_exception_table_exit There was reported lockup when we exit a snapshot with many exceptions. Fix this by adding "cond_resched" to the loop that frees the exceptions.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2024-35805 is a Linux kernel availability issue in Device Mapper snapshots. When a snapshot with many exceptions is exited, the kernel can lock up while freeing snapshot exception entries. The upstream fix lets the kernel reschedule during that cleanup loop.

Executive priority

Treat this as a targeted availability risk for Linux storage environments, not a broad internet emergency. Prioritize patching where snapshots are operationally important or where device vendors confirm affected firmware.

Technical view

The flaw is in Linux dm snapshot cleanup, specifically dm_exception_table_exit. The reported failure mode is a lockup during snapshot exit with many exceptions. Stable kernel fixes add cond_resched to the exception-freeing loop. No CVSS, CWE, or exploit details are provided in the supplied sources.

Likely exposure

Exposure is most relevant to Linux systems running affected kernel versions that use dm-snapshot functionality, including snapshot-heavy storage workflows. Debian and Siemens references indicate downstream packaging and product advisory attention, but the bundle does not prove all Linux deployments are reachable or affected in practice.

Exploitation context

The source bundle does not show active exploitation, public exploit code, or CISA KEV listing. The described impact is a lockup condition, so the practical concern is availability rather than data theft or remote code execution based on available evidence.

Researcher notes

Evidence supports a kernel scheduling bug during cleanup of many snapshot exceptions. The bundle lacks root-cause depth beyond the upstream fix description, CVSS scoring, prerequisites, and exploitability analysis. Validate against exact kernel branch fixes and downstream vendor backports.

Mitigation direction

  • Update affected Linux kernels to vendor-supported fixed builds.
  • Prioritize systems using Device Mapper or LVM snapshot workflows.
  • Review Debian LTS and device vendor advisories for packaged fixes.
  • For appliances, follow Siemens or relevant vendor firmware guidance.
  • Avoid inventing workarounds; check vendor guidance if patching is delayed.

Validation and detection

  • Inventory kernel versions against vendor advisories and fixed stable commits.
  • Identify hosts or appliances using dm-snapshot or LVM snapshots.
  • Confirm patched kernel packages are installed and active after reboot.
  • Review monitoring for historical lockups during snapshot cleanup.
  • Track vendor advisories for affected embedded or managed products.
Prepared
Confidence
medium
Sources
12

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

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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CVE-2024-35805 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
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.

0CVSS vectors
3Timeline events
3ADP providers
11Source links

SSVC decision data

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

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

CVECVE Program Container
CISA-ADPCISA ADP Vulnrichment
other:ssvc
siemens-SADPADP container

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2unaffected
LinuxLinux2.6.12, 0, 5.4.274, 5.10.215, 5.15.154, 6.1.84, 6.6.24, 6.7.12, 6.8.3, 6.9affected
Weakness

CWE details

No CWE listed

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