Vulnerability-Lookup

FKIE_CVE-2026-43378

Vulnerability from fkie_nvd - Published: 2026-05-08 15:16 - Updated: 2026-05-20 17:16

Severity

9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.8 (High) - CVSS:3.1/AV:L/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: smb: server: fix use-after-free in smb2_open() The opinfo pointer obtained via rcu_dereference(fp->f_opinfo) is dereferenced after rcu_read_unlock(), creating a use-after-free window.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/190e5f808e8058640b408ccfed25440b441a718a	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/1e689a56173827669a35da7cb2a3c78ed5c53680	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/54b48ae83de8bb06e65079d96368efe359d4909c	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/8f5b1a7cb009a93c48e9e334a2f59a660f9afc07	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/b720c84087cb547f23ce03eab93568c1769e4556	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/e1b21e6066615e7d3d3a7aa2677e415e563fd7cc	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

JSON

To clipboard

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}

CVE-2026-43378 (GCVE-0-2026-43378)

Vulnerability from cvelistv5 – Published: 2026-05-08 14:21 – Updated: 2026-05-20 16:08

Title

smb: server: fix use-after-free in smb2_open()

Summary

Severity

9.8 (Critical)


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

Assigner

Linux

References

6 references

URL	Tags
https://git.kernel.org/stable/c/e1b21e6066615e7d3…
https://git.kernel.org/stable/c/b720c84087cb547f2…
https://git.kernel.org/stable/c/54b48ae83de8bb06e…
https://git.kernel.org/stable/c/8f5b1a7cb009a93c4…
https://git.kernel.org/stable/c/190e5f808e8058640…
https://git.kernel.org/stable/c/1e689a56173827669…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 , < e1b21e6066615e7d3d3a7aa2677e415e563fd7cc (git) Affected: e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 , < b720c84087cb547f23ce03eab93568c1769e4556 (git) Affected: e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 , < 54b48ae83de8bb06e65079d96368efe359d4909c (git) Affected: e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 , < 8f5b1a7cb009a93c48e9e334a2f59a660f9afc07 (git) Affected: e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 , < 190e5f808e8058640b408ccfed25440b441a718a (git) Affected: e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 , < 1e689a56173827669a35da7cb2a3c78ed5c53680 (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: 6.18.19 , ≤ 6.18.* (semver) Unaffected: 6.19.9 , ≤ 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-2026-43378

CVE-2026-43378 (GCVE-0-2026-43378)

Tags

Sightings

Nomenclature