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Review reviewHigh

CVE-2026-64317

Linux

In the Linux kernel, the following vulnerability has been resolved: isofs: bound Rock Ridge symlink components to the SL record get_symlink_chunk() and the SL handling in parse_rock_ridge_inode_internal() walk the variable-length components of a Rock Ridge "SL" (symbolic link) record. Each component is a two-byte header (flags, len) followed by len bytes of text, so it occupies slp->len + 2 bytes. Both loops read slp->len and advance to the next component, and get_symlink_chunk() additionally does memcpy(rpnt, slp->text, slp->len), but neither checks that the component lies within the SL re...

CVSS
7.1
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 7.1

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: isofs: bound Rock Ridge symlink components to the SL record get_symlink_chunk() and the SL handling in parse_rock_ridge_inode_internal() walk the variable-length components of a Rock Ridge "SL" (symbolic link) record. Each component is a two-byte header (flags, len) followed by len bytes of text, so it occupies slp->len + 2 bytes. Both loops read slp->len and advance to the next component, and get_symlink_chunk() additionally does memcpy(rpnt, slp->text, slp->len), but neither checks that the component lies within the SL re...

Affected product and versions

Product
Linux
Affected versions
>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 1015e1c4b2fadd9c09704e24738e46598778c869, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 36fe7d25dbc40da0c6b1dd4513a4f69ac6164eee, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < a22cb6bb54dc167047ea9e70d97dfbc2c15649e3, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < b736b12108fd116c41777628f5a333791604df26, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 6bf41db09ef935d76fcc84ccf213b42c18de95ee, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < b5699642640d6cff357638738c5293985cd5a53d, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 9830725078c8483c6831ec10222ae724806ea36b, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 5fa1d6a5ec2356d2107dead614437c66fa7138b1, >= 2.6.12
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
CVE-2026-64317 — Linux | SECUFOCUS NOW