Vulnerability-Lookup

FKIE_CVE-2026-31710

Vulnerability from fkie_nvd - Published: 2026-05-01 14:16 - Updated: 2026-05-06 20:21

Severity ?

5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix dir separator in SMB1 UNIX mounts When calling cifs_mount_get_tcon() with SMB1 UNIX mounts, @cifs_sb->mnt_cifs_flags needs to be read or updated only after calling reset_cifs_unix_caps(), otherwise it might end up with missing CIFS_MOUNT_POSIXACL and CIFS_MOUNT_POSIX_PATHS bits. This fixes the wrong dir separator used in paths caused by the missing CIFS_MOUNT_POSIX_PATHS bit in cifs_sb_info::mnt_cifs_flags.

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/c4d3fc5844d685441befd0caaab648321013cdfd	Patch
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/fbbfcf35e1ee3396631f3dc6214cb626aa9814c3	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0

JSON

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{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
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              "matchCriteriaId": "892296EC-C52B-40F8-9C2B-E023C2B6B4C6",
              "versionEndExcluding": "7.0.2",
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      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix dir separator in SMB1 UNIX mounts\n\nWhen calling cifs_mount_get_tcon() with SMB1 UNIX mounts,\n@cifs_sb-\u003emnt_cifs_flags needs to be read or updated only after\ncalling reset_cifs_unix_caps(), otherwise it might end up with missing\nCIFS_MOUNT_POSIXACL and CIFS_MOUNT_POSIX_PATHS bits.\n\nThis fixes the wrong dir separator used in paths caused by the missing\nCIFS_MOUNT_POSIX_PATHS bit in cifs_sb_info::mnt_cifs_flags."
    }
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  "lastModified": "2026-05-06T20:21:16.730",
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          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
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        "impactScore": 3.6,
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      "type": "Primary"
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  ]
}

CVE-2026-31710 (GCVE-0-2026-31710)

Vulnerability from cvelistv5 – Published: 2026-05-01 13:56 – Updated: 2026-05-11 22:14

Title

smb: client: fix dir separator in SMB1 UNIX mounts

Summary

Severity ?

No CVSS data available.

Assigner

Linux

References

2 references

URL	Tags
https://git.kernel.org/stable/c/fbbfcf35e1ee33966…
https://git.kernel.org/stable/c/c4d3fc5844d685441…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 4fc3a433c13944ee5766ec5b9bf6f1eb4d29b880 , < fbbfcf35e1ee3396631f3dc6214cb626aa9814c3 (git) Affected: 4fc3a433c13944ee5766ec5b9bf6f1eb4d29b880 , < c4d3fc5844d685441befd0caaab648321013cdfd (git)
Linux	Linux	Affected: 7.0 Unaffected: 0 , < 7.0 (semver) Unaffected: 7.0.2 , ≤ 7.0.* (semver) Unaffected: 7.1-rc1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

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          "programFiles": [
            "fs/smb/client/connect.c",
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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

FKIE_CVE-2026-31710

CVE-2026-31710 (GCVE-0-2026-31710)

Tags

Sightings

Nomenclature