Vulnerability-Lookup

FKIE_CVE-2026-31409

Vulnerability from fkie_nvd - Published: 2026-04-06 08:16 - Updated: 2026-05-20 16:15

Severity

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

Summary

In the Linux kernel, the following vulnerability has been resolved: ksmbd: unset conn->binding on failed binding request When a multichannel SMB2_SESSION_SETUP request with SMB2_SESSION_REQ_FLAG_BINDING fails ksmbd sets conn->binding = true but never clears it on the error path. This leaves the connection in a binding state where all subsequent ksmbd_session_lookup_all() calls fall back to the global sessions table. This fix it by clearing conn->binding = false in the error path.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/282343cf8a4a5a3603b1cb0e17a7083e4a593b03	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/6260fc85ed1298a71d24a75d01f8b2e56d489a60	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/6ebef4a220a1ebe345de899ebb9ae394206fe921	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/89afe5e2dbea6e9d8e5f11324149d06fa3a4efca	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/9feb2d1bf86d9e5e66b8565f37f8d3a7d281a772	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d073870dab8f6dadced81d13d273ff0b21cb7f4e	Patch

Impacted products

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

JSON

To clipboard

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    }
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          "confidentialityImpact": "HIGH",
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  ]
}

CVE-2026-31409 (GCVE-0-2026-31409)

Vulnerability from cvelistv5 – Published: 2026-04-06 07:38 – Updated: 2026-05-11 22:08

Title

ksmbd: unset conn->binding on failed binding request

Summary

Severity

8.8 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux

References

6 references

URL	Tags
https://git.kernel.org/stable/c/d073870dab8f6dadc…
https://git.kernel.org/stable/c/6ebef4a220a1ebe34…
https://git.kernel.org/stable/c/89afe5e2dbea6e9d8…
https://git.kernel.org/stable/c/9feb2d1bf86d9e5e6…
https://git.kernel.org/stable/c/6260fc85ed1298a71…
https://git.kernel.org/stable/c/282343cf8a4a5a360…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: f5a544e3bab78142207e0242d22442db85ba1eff , < d073870dab8f6dadced81d13d273ff0b21cb7f4e (git) Affected: f5a544e3bab78142207e0242d22442db85ba1eff , < 6ebef4a220a1ebe345de899ebb9ae394206fe921 (git) Affected: f5a544e3bab78142207e0242d22442db85ba1eff , < 89afe5e2dbea6e9d8e5f11324149d06fa3a4efca (git) Affected: f5a544e3bab78142207e0242d22442db85ba1eff , < 9feb2d1bf86d9e5e66b8565f37f8d3a7d281a772 (git) Affected: f5a544e3bab78142207e0242d22442db85ba1eff , < 6260fc85ed1298a71d24a75d01f8b2e56d489a60 (git) Affected: f5a544e3bab78142207e0242d22442db85ba1eff , < 282343cf8a4a5a3603b1cb0e17a7083e4a593b03 (git)
Linux	Linux	Affected: 5.15 Unaffected: 0 , < 5.15 (semver) Unaffected: 6.1.167 , ≤ 6.1.* (semver) Unaffected: 6.6.130 , ≤ 6.6.* (semver) Unaffected: 6.12.78 , ≤ 6.12.* (semver) Unaffected: 6.18.20 , ≤ 6.18.* (semver) Unaffected: 6.19.10 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

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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-2026-31409

CVE-2026-31409 (GCVE-0-2026-31409)

Tags

Sightings

Nomenclature