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CVE Record

CVE-2024-49994: block: fix integer overflow in BLKSECDISCARD

In the Linux kernel, the following vulnerability has been resolved: block: fix integer overflow in BLKSECDISCARD I independently rediscovered commit 22d24a544b0d49bbcbd61c8c0eaf77d3c9297155 block: fix overflow in blk_ioctl_discard() but for secure erase. Same problem: uint64_t r[2] = {512, 18446744073709551104ULL}; ioctl(fd, BLKSECDISCARD, r); will enter near infinite loop inside blkdev_issue_secure_erase(): a.out: attempt to access beyond end of device loop0: rw=5, sector=3399043073, nr_sectors = 1024 limit=2048 bio_check_eod: 3286214 callbacks suppressed

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2024-49994 is a Linux kernel block-layer bug in secure discard handling. A malformed secure erase request can trigger an integer overflow and drive the kernel into a near-infinite loop. Business impact is most likely local availability loss on affected Linux systems, not confirmed remote compromise.

Executive priority

Treat as a prioritized patch-management issue for Linux fleets and affected appliances. Escalate where untrusted users, shared hosting, or exposed local device access increases denial-of-service risk. No source in the bundle confirms active exploitation.

Technical view

The flaw is in BLKSECDISCARD processing in the Linux kernel block subsystem. The CVE description says an integer overflow can occur before blkdev_issue_secure_erase(), causing repeated beyond-end-of-device handling and a near-infinite loop. Kernel stable commits are listed as fixes; Debian and Siemens advisories reference downstream exposure.

Likely exposure

Exposure is limited to Linux systems running affected kernel ranges and workloads where an actor can issue secure discard operations to block devices. Appliances and embedded products using affected Linux kernels may also be exposed, as reflected by the Siemens advisory.

Exploitation context

The bundle does not show CISA KEV listing, active exploitation, public exploitation claims, or remote attack evidence. The available evidence supports a local denial-of-service style condition through block-device secure discard handling, but operational prerequisites are not fully described.

Researcher notes

The source bundle names the fixed area and stable kernel commits, but lacks CVSS, CWE, full affected-version semantics, and exploitability prerequisites. Avoid assuming remote reachability or privilege impact beyond the documented near-infinite loop unless vendor advisories add evidence.

Mitigation direction

  • Update affected Linux kernels to vendor-supported fixed builds.
  • Review Debian LTS and device-vendor advisories for packaged kernel updates.
  • For appliances, follow Siemens or relevant OEM remediation guidance.
  • Restrict untrusted local access to block devices where operationally feasible.

Validation and detection

  • Inventory Linux kernel versions across servers, appliances, and embedded systems.
  • Compare installed kernels against vendor advisories and listed stable fixes.
  • Confirm whether affected systems expose block-device operations to untrusted local users.
  • Track remediation status through OS package and appliance firmware records.
Prepared
Confidence
medium
Sources
9

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-2024-49994 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
8Source 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

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

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux44abff2c0b970ae3d310b97617525dc01f248d7c, 44abff2c0b970ae3d310b97617525dc01f248d7c, 44abff2c0b970ae3d310b97617525dc01f248d7c, 44abff2c0b970ae3d310b97617525dc01f248d7c, 44abff2c0b970ae3d310b97617525dc01f248d7cunaffected
LinuxLinux5.19, 0, 6.1.128, 6.6.75, 6.10.14, 6.11.3, 6.12affected
Weakness

CWE details

No CWE listed

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