CVE Explorer

CVE-2026-64401

In the Linux kernel, the following vulnerability has been resolved: smb: client: resolve SWN tcon from live registrations cifs_swn_notify() looks up a witness registration by id under cifs_swnreg_idr_mutex, drops the mutex, and then uses the registration's cached tcon pointer. That pointer is not a lifetime reference, and it is not a stable representative once cifs_get_swn_reg() lets multiple tcons for the same net/share name share one registration id. A same-share second mount can keep the

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:2bff29bef4769608cbb6d8013a7cbf6dd17692324598dcc03458c58a3eb31ed2

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 2 assertions

{"defaultStatus":"affected","product":"Linux","programFiles":["fs/smb/client/cifs_swn.c","fs/smb/client/trace.h"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.11"},{"lessThan":"5.11","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.178","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.145","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.97","versionT…

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:bff187ac5c7103726b5151e818e9a437ff52fcf1e870167e6a054f7dcd7c7664 · sha256:eb0e2e3d57349d72… · /containers/cna/affected/1

{"defaultStatus":"unaffected","product":"Linux","programFiles":["fs/smb/client/cifs_swn.c","fs/smb/client/trace.h"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"51d18db392e5386a7bb9e816d611f14e600cca3c","status":"affected","version":"fed979a7e082bd9f25f9002c3c4f8740dacd0bc8","versionType":"git"},{"lessThan":"aa3c0cab4b28c5007ec570c63e1d6ad6943ed0fd","status":"affected","version":"fed979a7e082bd9f25f9002c3c4f8740dacd0bc8","versionType":"git"},{"lessThan":"945b4a4a54497db1dcb2f20ef801a84e884dac21","status":"affected","version…

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:bff187ac5c7103726b5151e818e9a437ff52fcf1e870167e6a054f7dcd7c7664 · sha256:eb0e2e3d57349d72… · /containers/cna/affected/0

Affected products and versions

2 source assertions

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:bff187ac5c7103726b5151e818e9a437ff52fcf1e870167e6a054f7dcd7c7664 · sha256:eb0e2e3d57349d72… · /containers/cna/affected/1

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:bff187ac5c7103726b5151e818e9a437ff52fcf1e870167e6a054f7dcd7c7664 · sha256:eb0e2e3d57349d72… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/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:bff187ac5c7103726b5151e818e9a437ff52fcf1e870167e6a054f7dcd7c7664 · sha256:eb0e2e3d57349d72… · /containers/cna/metrics/0/cvssV3_1

Source references

6 source assertions

{"url":"https://git.kernel.org/stable/c/0700f946659d0ab2352ec8a9b1c6fc74b13a27d7"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:bff187ac5c7103726b5151e818e9a437ff52fcf1e870167e6a054f7dcd7c7664 · sha256:eb0e2e3d57349d72… · /containers/cna/references/4

{"url":"https://git.kernel.org/stable/c/51d18db392e5386a7bb9e816d611f14e600cca3c"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:bff187ac5c7103726b5151e818e9a437ff52fcf1e870167e6a054f7dcd7c7664 · sha256:eb0e2e3d57349d72… · /containers/cna/references/0

{"url":"https://git.kernel.org/stable/c/91b8a58c6ac15c7db6518f696389933282f88da7"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:bff187ac5c7103726b5151e818e9a437ff52fcf1e870167e6a054f7dcd7c7664 · sha256:eb0e2e3d57349d72… · /containers/cna/references/3

{"url":"https://git.kernel.org/stable/c/945b4a4a54497db1dcb2f20ef801a84e884dac21"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:bff187ac5c7103726b5151e818e9a437ff52fcf1e870167e6a054f7dcd7c7664 · sha256:eb0e2e3d57349d72… · /containers/cna/references/2

{"url":"https://git.kernel.org/stable/c/aa3c0cab4b28c5007ec570c63e1d6ad6943ed0fd"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:bff187ac5c7103726b5151e818e9a437ff52fcf1e870167e6a054f7dcd7c7664 · sha256:eb0e2e3d57349d72… · /containers/cna/references/1

{"url":"https://git.kernel.org/stable/c/ec457f9afe5ae9538bdcd58fd4cb442b9787e183"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:bff187ac5c7103726b5151e818e9a437ff52fcf1e870167e6a054f7dcd7c7664 · sha256:eb0e2e3d57349d72… · /containers/cna/references/5

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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