ZDF
Sign inSign up

Vulnerabilities

Vulnerability · CVE-2026-72318

cifs: validate DFS referral string offsets

Published Aug 15, 2026 · catalog updated Oct 14, 2026 · cifs: validate DFS referral

Check if you run it

No confirmed exploitation is on record for CVE-2026-72318. EPSS is 0.59%. Act only if a listed version of cifs: validate DFS referral is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (cifs: validate DFS referral).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Critical9.4
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.59%
Remediation
Advisory link
Affected products
Linux Kernel

In the Linux kernel, the following vulnerability has been resolved: cifs: validate DFS referral string offsets parse_dfs_referrals() validates that the response header and referral array fit in the received buffer, but each referral also contains string offsets supplied by the server. Those offsets are used to compute the DfsPath and NetworkAddress string pointers without checking whether they still point inside the response buffer. A malformed referral can therefore make the computed pointer exceed the end of the buffer. The resulting negative max_len is then passed to cifs_strndup_from_utf16(), and the non-Unicode path forwards it to kstrndup() as a size_t, allowing strnlen() to read out of bounds. Validate each string offset before deriving the string pointer.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • Linux Kernel4.11.0 → 6.1.178

How to fix CVE-2026-72318

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-72318. EPSS is 0.59%. Act only if a listed version of cifs: validate DFS referral is installed.

Which versions are affected?

Compare what you have installed with Kernel 4.11.0 → 6.1.178. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.59%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Aug 15, 2026 · Catalog

    Detected

    In the Linux kernel, the following vulnerability has been resolved: cifs: validate DFS referral string offsets parse_dfs_referrals() validates that the response header and referral array fit in the received buffer, but each referral also contains string offsets supplied by the server. Those offsets are used to compute the DfsPath and NetworkAddress string pointers without checking whether they sti

  2. Oct 13, 2026 · Catalog

    Fix available

    Linux Kernel 4.11.0 → 6.1.178

  3. Oct 13, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    Kernel fixed in 6.1.178

  4. Oct 13, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    Kernel fixed in 6.1.178

  5. Oct 13, 2026 · Catalog

    Updated

    In the Linux kernel, the following vulnerability has been resolved: cifs: validate DFS referral string offsets parse_dfs_referrals() validates that the response header and referral array fit in the received buffer, but each referral also contains string offsets supplied by the server. Those offsets are used to compute the DfsPath and NetworkAddress string pointers without checking whether they sti

  6. Oct 14, 2026 · OpenSSF OSV / OSV Scanner

    Updated

    In the Linux kernel, the following vulnerability has been resolved: cifs: validate DFS referral string offsets parse_dfs_referrals() validates that the response header and referral array fit in the received buffer, but each referral also contains string offsets supplied by the server. Those offsets are used to compute the DfsPath and NetworkAddress string pointers without checking whether they sti

Sources

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.