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Review reviewHigh

CVE-2025-68819

Linux

In the Linux kernel, the following vulnerability has been resolved: media: dvb-usb: dtv5100: fix out-of-bounds in dtv5100_i2c_msg() rlen value is a user-controlled value, but dtv5100_i2c_msg() does not check the size of the rlen value. Therefore, if it is set to a value larger than sizeof(st->data), an out-of-bounds vuln occurs for st->data. Therefore, we need to add proper range checking to prevent this vuln.

CVSS
7.8
EPSS
0.13%
2.96% percentile
CISA KEV
Not listed
Published
2026.01.14
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.13%
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: media: dvb-usb: dtv5100: fix out-of-bounds in dtv5100_i2c_msg() rlen value is a user-controlled value, but dtv5100_i2c_msg() does not check the size of the rlen value. Therefore, if it is set to a value larger than sizeof(st->data), an out-of-bounds vuln occurs for st->data. Therefore, we need to add proper range checking to prevent this vuln.

Affected product and versions

Product
Linux
Affected versions
>= 60688d5e6e6e2ae62f29762d1e3b2aec2dbd3817 < c2c293ea7b61f12cdaad1e99a5b4efc58c88960a, >= 60688d5e6e6e2ae62f29762d1e3b2aec2dbd3817 < c2305b4c5fc15e20ac06c35738e0578eb4323750, >= 60688d5e6e6e2ae62f29762d1e3b2aec2dbd3817 < 61f214a878e96e2a8750bf96a98f78c658dba60c, >= 60688d5e6e6e2ae62f29762d1e3b2aec2dbd3817 < 4a54d8fcb093761e4c56eb211cf4e39bf8401fa1, >= 60688d5e6e6e2ae62f29762d1e3b2aec2dbd3817 < fe3e129ab49806aaaa3f22067ebc75c2dfbe4658, >= 60688d5e6e6e2ae62f29762d1e3b2aec2dbd3817 < ac92151ff2494130d9fc686055d6bbb9743a673e, >= 60688d5e6e6e2ae62f29762d1e3b2aec2dbd3817 < b91e6aafe8d356086cc621bc03e35ba2299e4788, >= 2.6.28
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
Not available
CVE-2025-68819 — Linux | SECUFOCUS NOW