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CVE Record

CVE-2024-47698: drivers: media: dvb-frontends/rtl2832: fix an out-of-bounds write error

In the Linux kernel, the following vulnerability has been resolved: drivers: media: dvb-frontends/rtl2832: fix an out-of-bounds write error Ensure index in rtl2832_pid_filter does not exceed 31 to prevent out-of-bounds access. dev->filters is a 32-bit value, so set_bit and clear_bit functions should only operate on indices from 0 to 31. If index is 32, it will attempt to access a non-existent 33rd bit, leading to out-of-bounds access. Change the boundary check from index > 32 to index >= 32 to resolve this issue. [hverkuil: added fixes tag, rtl2830_pid_filter -> rtl2832_pid_filter in logmsg]

HighCVSS 7.8Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

A boundary-check error in Linux’s RTL2832 digital-TV frontend driver can write beyond a 32-bit filter field. A local, low-privileged user may be able to trigger memory corruption, potentially affecting confidentiality, integrity, or availability. Exposure depends on the affected kernel code and relevant driver being present and accessible.

Executive priority

Treat this as a high-priority kernel maintenance issue on systems supporting RTL2832 DVB hardware or exposing the driver to untrusted local users. It is less urgent for systems without the relevant driver path. Require evidence-based inventory and vendor-version mapping rather than assuming every Linux host is exploitable.

Technical view

rtl2832_pid_filter permitted index 32 because it rejected only values greater than 32. dev->filters contains 32 bits, so valid indices are 0–31; bit operations at 32 access outside the field. The fix changes the check to reject indices greater than or equal to 32. CVSS 3.1 is 7.8 with local, low-complexity, low-privilege access.

Likely exposure

Prioritize Linux systems using affected kernel versions where the RTL2832 DVB frontend driver is available to local users. Internet-facing status alone does not establish exposure because the supplied CVSS vector specifies local access. The bundle’s version data is not sufficiently clear for reliable package-level conclusions; confirm applicability with each Linux distributor.

Exploitation context

The supplied sources do not report active exploitation, and the CVE is not identified as KEV. Exploitation requires local, low-privileged access and no user interaction according to the supplied CVSS vector. The sources describe an out-of-bounds write but do not establish a demonstrated exploit or specific real-world impact.

Researcher notes

The defect is an off-by-one bounds check around a 32-bit bitmap: index 32 reaches a nonexistent bit. The upstream correction changes index > 32 to index >= 32. The supplied version list contains ambiguous entries and repeated commit identifiers, so affected-range analysis should rely on vendor package advisories and fix backports.

Mitigation direction

  • Install the vendor or distribution kernel update containing the upstream boundary-check fix.
  • Consult Linux distributor advisories to map the CVE to exact package versions.
  • Prioritize multi-user systems where untrusted local users can access the affected driver.
  • If immediate updating is impossible, assess whether the unnecessary driver can be disabled under vendor guidance.

Validation and detection

  • Inventory kernel versions and distribution package revisions across Linux systems.
  • Determine whether the RTL2832 DVB frontend driver is installed, loaded, or operationally required.
  • Compare installed packages with vendor advisories and the referenced stable-kernel fixes.
  • After updating, verify the running kernel changed and vendor status marks the CVE resolved.
Prepared
Confidence
high
Sources
5

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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CVE-2024-47698 mapping review

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Vulnerability profileCVE Program record
Severity
High
CVSS
7.8 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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
2ADP providers
12Source 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
7.8CVSS 3.1HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H1.85.9Linux

Vulnerability scoring details

Base CVSS 3.1 score

7.8High
CVSS 3.1 vector shape for CVE-2024-47698Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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
other:ssvc
CVECVE Program Container

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux4b01e01a81b6629878344430531ced347cc2ed5b, 4b01e01a81b6629878344430531ced347cc2ed5b, 4b01e01a81b6629878344430531ced347cc2ed5b, 4b01e01a81b6629878344430531ced347cc2ed5b, 4b01e01a81b6629878344430531ced347cc2ed5b, 4b01e01a81b6629878344430531ced347cc2ed5b, 4b01e01a81b6629878344430531ced347cc2ed5b, 4b01e01a81b6629878344430531ced347cc2ed5b, 4b01e01a81b6629878344430531ced347cc2ed5bunaffected
LinuxLinux4.0, 0, 4.19.323, 5.4.285, 5.10.227, 5.15.168, 6.1.113, 6.6.54, 6.10.13, 6.11.2, 6.12affected
Weakness

CWE details

No CWE listed

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