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Review reviewHigh

CVE-2023-54284

Linux

In the Linux kernel, the following vulnerability has been resolved: media: av7110: prevent underflow in write_ts_to_decoder() The buf[4] value comes from the user via ts_play(). It is a value in the u8 range. The final length we pass to av7110_ipack_instant_repack() is "len - (buf[4] + 1) - 4" so add a check to ensure that the length is not negative. It's not clear that passing a negative len value does anything bad necessarily, but it's not best practice. With the new bounds checking the "if (!len)" condition is no longer possible or required so remove that.

CVSS
7.1
EPSS
0.14%
3.50% percentile
CISA KEV
Not listed
Published
2025.12.30
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.14%
Technical severityCVSS 7.1

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: media: av7110: prevent underflow in write_ts_to_decoder() The buf[4] value comes from the user via ts_play(). It is a value in the u8 range. The final length we pass to av7110_ipack_instant_repack() is "len - (buf[4] + 1) - 4" so add a check to ensure that the length is not negative. It's not clear that passing a negative len value does anything bad necessarily, but it's not best practice. With the new bounds checking the "if (!len)" condition is no longer possible or required so remove that.

Affected product and versions

Product
Linux
Affected versions
>= fd46d16d602ab7fd53cef7ff55b9dcb0b47ad3bf < 6680af5be9f08d830567e9118f76d3e64684db8f, >= fd46d16d602ab7fd53cef7ff55b9dcb0b47ad3bf < 6606e2404ee9e20a3ae5b42fc3660d41b739ed3e, >= fd46d16d602ab7fd53cef7ff55b9dcb0b47ad3bf < 620b983589e0223876bf1463b01100a9c67b56ba, >= fd46d16d602ab7fd53cef7ff55b9dcb0b47ad3bf < 86ba65e5357bfbb6c082f68b265a292ee1bdde1d, >= fd46d16d602ab7fd53cef7ff55b9dcb0b47ad3bf < ca4ce92e3ec9fd3c7c936b912b95c53331d5159c, >= fd46d16d602ab7fd53cef7ff55b9dcb0b47ad3bf < 423350af9e27f005611bd881b1df2cab66de943d, >= fd46d16d602ab7fd53cef7ff55b9dcb0b47ad3bf < 77eeb4732135c18c2fdfab80839645b393f3e774, >= fd46d16d602ab7fd53cef7ff55b9dcb0b47ad3bf < 7b93ab60fe9ed04be0ff155bc30ad39dea23e22b, >= fd46d16d602ab7fd53cef7ff55b9dcb0b47ad3bf < eed9496a0501357aa326ddd6b71408189ed872eb, >= 2.6.31
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:N/A:H
CWE
Not available