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CVE Record

CVE-2025-71136: media: adv7842: Avoid possible out-of-bounds array accesses in adv7842_cp_log_status()

In the Linux kernel, the following vulnerability has been resolved: media: adv7842: Avoid possible out-of-bounds array accesses in adv7842_cp_log_status() It's possible for cp_read() and hdmi_read() to return -EIO. Those values are further used as indexes for accessing arrays. Fix that by checking return values where it's needed. Found by Linux Verification Center (linuxtesting.org) with SVACE.

HighCVSS 7.1Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

A Linux media-driver error can treat a failed hardware read as an array position, potentially reading outside valid memory. The supplied CVSS assessment indicates possible serious information disclosure or system disruption, but requires local, low-privileged access. Exposure is likely limited to systems using the ADV7842 media driver.

Executive priority

Treat this as an expedited kernel-maintenance issue on systems using the affected media driver, not a fleet-wide emergency without confirmed reachability. Patch exposed multi-user or sensitive systems first. Current sources show meaningful potential impact but no evidence of active exploitation.

Technical view

In adv7842_cp_log_status(), cp_read() or hdmi_read() can return -EIO. The negative error value may then be used as an array index, causing an out-of-bounds access. The stable fixes validate relevant return values before indexing. The supplied vector is local, low complexity, low privileges, no user interaction, with high confidentiality and availability impact.

Likely exposure

Prioritize Linux systems containing and using the ADV7842 media driver, especially where untrusted local users can reach its status-reporting path. The supplied record lists affected kernel entries from 3.12 through 6.19, but does not provide clear distribution-package mappings. Confirm exposure against each distribution's advisory and backport status.

Exploitation context

The supplied CVSS vector describes local exploitation requiring low privileges; it does not indicate remote reachability. CVE-2025-71136 is not listed as KEV in the bundle, and no cited evidence establishes active exploitation or a public proof of concept. Practical reachability depends on driver configuration and access to the affected path.

Researcher notes

The record provides no CWE, public exploit, demonstrated trigger, or detailed memory-disclosure analysis. Its version data is ambiguous and includes commit identifiers plus branch-version entries, so avoid inferring exact vulnerable ranges. Review the stable patches and downstream backports to establish whether a deployed kernel lacks the return-value checks.

Mitigation direction

  • Upgrade to a vendor-supported kernel containing the applicable referenced stable fix.
  • Check distribution security advisories for package-specific fixed versions and backports.
  • Restrict untrusted local access while affected systems await updates.
  • Disable the ADV7842 driver only if operationally safe and vendor guidance supports doing so.

Validation and detection

  • Inventory kernel versions and distribution package revisions across Linux systems.
  • Determine whether the ADV7842 driver is present, enabled, or actively used.
  • Match kernel source or vendor changelogs against the referenced stable commits.
  • After updating, confirm the running kernel includes the vendor's CVE fix.
  • Monitor vendor advisories for corrected affected-version mappings or revised severity.
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.

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CVE-2025-71136 mapping review

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Vulnerability profileCVE Program record
Severity
High
CVSS
7.1 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/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
0ADP providers
8Source links

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
7.1CVSS 3.1HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H1.85.2Linux

Vulnerability scoring details

Base CVSS 3.1 score

7.1High
CVSS 3.1 vector shape for CVE-2025-71136Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinuxa89bcd4c6c2023615a89001b5a11b0bb77eb9491, a89bcd4c6c2023615a89001b5a11b0bb77eb9491, a89bcd4c6c2023615a89001b5a11b0bb77eb9491, a89bcd4c6c2023615a89001b5a11b0bb77eb9491, a89bcd4c6c2023615a89001b5a11b0bb77eb9491, a89bcd4c6c2023615a89001b5a11b0bb77eb9491, a89bcd4c6c2023615a89001b5a11b0bb77eb9491unaffected
LinuxLinux3.12, 0, 5.10.248, 5.15.198, 6.1.160, 6.6.120, 6.12.64, 6.18.4, 6.19affected
Weakness

CWE details

No CWE listed

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