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CVE-2026-43378

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.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:752269d1b4fb874a16825ef2a039447942be1ad03effbe6f9c916dbc4f2bf2e3
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 2 assertions

{"defaultStatus":"affected","product":"Linux","programFiles":["fs/smb/server/smb2pdu.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.15"},{"lessThan":"5.15","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.167","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.130","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.78","versionType":"semver"},{"lessThan…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:e63161c15ded3d78a0e7357b2114616362b4e69d5f32fa8c1714ab5b1bf66658 · sha256:084b938490d84b51… · /containers/cna/affected/1

{"defaultStatus":"unaffected","product":"Linux","programFiles":["fs/smb/server/smb2pdu.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"e1b21e6066615e7d3d3a7aa2677e415e563fd7cc","status":"affected","version":"e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9","versionType":"git"},{"lessThan":"b720c84087cb547f23ce03eab93568c1769e4556","status":"affected","version":"e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9","versionType":"git"},{"lessThan":"54b48ae83de8bb06e65079d96368efe359d4909c","status":"affected","version":"e2f34481b24db2fd634b5e…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:e63161c15ded3d78a0e7357b2114616362b4e69d5f32fa8c1714ab5b1bf66658 · sha256:084b938490d84b51… · /containers/cna/affected/0

Affected products and versions

2 source assertions
{"defaultStatus":"affected","product":"Linux","programFiles":["fs/smb/server/smb2pdu.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.15"},{"lessThan":"5.15","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.167","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.130","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.78","versionType":"semver"},{"lessThan…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:e63161c15ded3d78a0e7357b2114616362b4e69d5f32fa8c1714ab5b1bf66658 · sha256:084b938490d84b51… · /containers/cna/affected/1
{"defaultStatus":"unaffected","product":"Linux","programFiles":["fs/smb/server/smb2pdu.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"e1b21e6066615e7d3d3a7aa2677e415e563fd7cc","status":"affected","version":"e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9","versionType":"git"},{"lessThan":"b720c84087cb547f23ce03eab93568c1769e4556","status":"affected","version":"e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9","versionType":"git"},{"lessThan":"54b48ae83de8bb06e65079d96368efe359d4909c","status":"affected","version":"e2f34481b24db2fd634b5e…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:e63161c15ded3d78a0e7357b2114616362b4e69d5f32fa8c1714ab5b1bf66658 · sha256:084b938490d84b51… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"baseScore":9.8,"baseSeverity":"CRITICAL","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:e63161c15ded3d78a0e7357b2114616362b4e69d5f32fa8c1714ab5b1bf66658 · sha256:084b938490d84b51… · /containers/cna/metrics/0/cvssV3_1

Source references

6 source assertions
{"url":"https://git.kernel.org/stable/c/190e5f808e8058640b408ccfed25440b441a718a"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e63161c15ded3d78a0e7357b2114616362b4e69d5f32fa8c1714ab5b1bf66658 · sha256:084b938490d84b51… · /containers/cna/references/4
{"url":"https://git.kernel.org/stable/c/1e689a56173827669a35da7cb2a3c78ed5c53680"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e63161c15ded3d78a0e7357b2114616362b4e69d5f32fa8c1714ab5b1bf66658 · sha256:084b938490d84b51… · /containers/cna/references/5
{"url":"https://git.kernel.org/stable/c/54b48ae83de8bb06e65079d96368efe359d4909c"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e63161c15ded3d78a0e7357b2114616362b4e69d5f32fa8c1714ab5b1bf66658 · sha256:084b938490d84b51… · /containers/cna/references/2
{"url":"https://git.kernel.org/stable/c/8f5b1a7cb009a93c48e9e334a2f59a660f9afc07"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e63161c15ded3d78a0e7357b2114616362b4e69d5f32fa8c1714ab5b1bf66658 · sha256:084b938490d84b51… · /containers/cna/references/3
{"url":"https://git.kernel.org/stable/c/b720c84087cb547f23ce03eab93568c1769e4556"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e63161c15ded3d78a0e7357b2114616362b4e69d5f32fa8c1714ab5b1bf66658 · sha256:084b938490d84b51… · /containers/cna/references/1
{"url":"https://git.kernel.org/stable/c/e1b21e6066615e7d3d3a7aa2677e415e563fd7cc"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e63161c15ded3d78a0e7357b2114616362b4e69d5f32fa8c1714ab5b1bf66658 · sha256:084b938490d84b51… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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