smb: server: fix use-after-free in smb2_open()
Summary
| CVE | CVE-2026-43378 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-05-08 15:16:48 UTC |
| Updated | 2026-05-12 14:10:27 UTC |
| Description | 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. |
Risk And Classification
EPSS: 0.000240000 probability, percentile 0.070360000 (date 2026-05-12)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 e1b21e6066615e7d3d3a7aa2677e415e563fd7cc git | Not specified |
| CNA | Linux | Linux | affected e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 b720c84087cb547f23ce03eab93568c1769e4556 git | Not specified |
| CNA | Linux | Linux | affected e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 54b48ae83de8bb06e65079d96368efe359d4909c git | Not specified |
| CNA | Linux | Linux | affected e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 8f5b1a7cb009a93c48e9e334a2f59a660f9afc07 git | Not specified |
| CNA | Linux | Linux | affected e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 190e5f808e8058640b408ccfed25440b441a718a git | Not specified |
| CNA | Linux | Linux | affected e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 1e689a56173827669a35da7cb2a3c78ed5c53680 git | Not specified |
| CNA | Linux | Linux | affected 5.15 | Not specified |
| CNA | Linux | Linux | unaffected 5.15 semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.167 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.130 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.78 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.19 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.19.9 6.19.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.0 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/54b48ae83de8bb06e65079d96368efe359d4909c | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/8f5b1a7cb009a93c48e9e334a2f59a660f9afc07 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/e1b21e6066615e7d3d3a7aa2677e415e563fd7cc | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/190e5f808e8058640b408ccfed25440b441a718a | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/b720c84087cb547f23ce03eab93568c1769e4556 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/1e689a56173827669a35da7cb2a3c78ed5c53680 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.