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Review reviewHigh

CVE-2026-64296

Linux

In the Linux kernel, the following vulnerability has been resolved: exfat: bound uniname advance in exfat_find_dir_entry() In exfat_find_dir_entry(), each TYPE_EXTEND (file name) entry advances the output pointer by a fixed amount while the loop guard only tracks the accumulated name length: if (++order == 2) uniname = p_uniname->name; else uniname += EXFAT_FILE_NAME_LEN; len = exfat_extract_uni_name(ep, entry_uniname); name_len += len; unichar = *(uniname+len); *(uniname+len) = 0x0; uniname grows by EXFAT_FILE_NAME_LEN (15) per name entry, but name_len grows only by the actual extracted le...

CVSS
7.8
EPSS
-
- percentile
CISA KEV
Not listed
Published
2026.07.25
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability-
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: exfat: bound uniname advance in exfat_find_dir_entry() In exfat_find_dir_entry(), each TYPE_EXTEND (file name) entry advances the output pointer by a fixed amount while the loop guard only tracks the accumulated name length: if (++order == 2) uniname = p_uniname->name; else uniname += EXFAT_FILE_NAME_LEN; len = exfat_extract_uni_name(ep, entry_uniname); name_len += len; unichar = *(uniname+len); *(uniname+len) = 0x0; uniname grows by EXFAT_FILE_NAME_LEN (15) per name entry, but name_len grows only by the actual extracted le...

Affected product and versions

Product
Linux
Affected versions
>= ca06197382bde0a3bc20215595d1c9ce20c6e341 < 72a2589d82eb001c94b74bcfe6f9a599bd9bef60, >= ca06197382bde0a3bc20215595d1c9ce20c6e341 < fae76a94b35ee8c0e2eb6f64caca01d75c6d34e4, >= ca06197382bde0a3bc20215595d1c9ce20c6e341 < cf85180b8a015029ee147694eaf4e0b3537e9432, >= ca06197382bde0a3bc20215595d1c9ce20c6e341 < ce4736c1e6c4cfbf1ac409a8c328a0b69546c9a0, >= ca06197382bde0a3bc20215595d1c9ce20c6e341 < 727bf7783a2936ffd55c628dddfd69343e511dcf, >= ca06197382bde0a3bc20215595d1c9ce20c6e341 < 33c0b96d7e1672be1de0053786637ea46fb81507, >= ca06197382bde0a3bc20215595d1c9ce20c6e341 < c8e041c68c0bbb73aa62371ee63947bb6949d8b2, >= ca06197382bde0a3bc20215595d1c9ce20c6e341 < 3a1230e7b043c62737b05a3e9275ca83a43ad20a, >= 5.7
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-2026-64296 — Linux | SECUFOCUS NOW