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CVE-2026-52944

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix FSCTL permission bypass by adding a permission check for FSCTL_SET_SPARSE FSCTL_SET_SPARSE in fsctl_set_sparse() modifies the file's sparse attribute and saves it through xattr without any permission checks. This exposes two issues: 1) A client on a read-only share can change the sparse attribute on files it opened, even though the share is read-only. Other FSCTL write operations already check test_tree_c
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:f45beba0e9d78e851a827c1761618451a8c13010fb86ea6eef962e1b8e5b8797
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":"6.6.*","status":"unaffected","version":"6.6.143","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.35","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.12","versionType":"semver"},{"lessThanO…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:fc7af3c143f8cc2a7cdfea993b22fa9bc7d514dde9e6e309374325de3a2e493a · sha256:e8c90d51fda2faf3… · /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":"3127a884525dc8ca4def73254bfcd3ccef0bf812","status":"affected","version":"e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9","versionType":"git"},{"lessThan":"de9eb0b44fa9123170e6245b49638e0e453c10f8","status":"affected","version":"e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9","versionType":"git"},{"lessThan":"aef151bcfa494bfe983669de2726734b534adb73","status":"affected","version":"e2f34481b24db2fd634b5e…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:fc7af3c143f8cc2a7cdfea993b22fa9bc7d514dde9e6e309374325de3a2e493a · sha256:e8c90d51fda2faf3… · /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":"6.6.*","status":"unaffected","version":"6.6.143","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.35","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.12","versionType":"semver"},{"lessThanO…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:fc7af3c143f8cc2a7cdfea993b22fa9bc7d514dde9e6e309374325de3a2e493a · sha256:e8c90d51fda2faf3… · /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":"3127a884525dc8ca4def73254bfcd3ccef0bf812","status":"affected","version":"e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9","versionType":"git"},{"lessThan":"de9eb0b44fa9123170e6245b49638e0e453c10f8","status":"affected","version":"e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9","versionType":"git"},{"lessThan":"aef151bcfa494bfe983669de2726734b534adb73","status":"affected","version":"e2f34481b24db2fd634b5e…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:fc7af3c143f8cc2a7cdfea993b22fa9bc7d514dde9e6e309374325de3a2e493a · sha256:e8c90d51fda2faf3… · /containers/cna/affected/0

Source references

4 source assertions
{"url":"https://git.kernel.org/stable/c/3127a884525dc8ca4def73254bfcd3ccef0bf812"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:fc7af3c143f8cc2a7cdfea993b22fa9bc7d514dde9e6e309374325de3a2e493a · sha256:e8c90d51fda2faf3… · /containers/cna/references/0
{"url":"https://git.kernel.org/stable/c/aef151bcfa494bfe983669de2726734b534adb73"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:fc7af3c143f8cc2a7cdfea993b22fa9bc7d514dde9e6e309374325de3a2e493a · sha256:e8c90d51fda2faf3… · /containers/cna/references/2
{"url":"https://git.kernel.org/stable/c/cc57232cae23c0df91b4a59d0f519141ce9b5b02"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:fc7af3c143f8cc2a7cdfea993b22fa9bc7d514dde9e6e309374325de3a2e493a · sha256:e8c90d51fda2faf3… · /containers/cna/references/3
{"url":"https://git.kernel.org/stable/c/de9eb0b44fa9123170e6245b49638e0e453c10f8"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:fc7af3c143f8cc2a7cdfea993b22fa9bc7d514dde9e6e309374325de3a2e493a · sha256:e8c90d51fda2faf3… · /containers/cna/references/1

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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