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CVE-2026-31706

In the Linux kernel, the following vulnerability has been resolved: ksmbd: validate num_aces and harden ACE walk in smb_inherit_dacl() smb_inherit_dacl() trusts the on-disk num_aces value from the parent directory's DACL xattr and uses it to size a heap allocation: aces_base = kmalloc(sizeof(struct smb_ace) * num_aces * 2, ...); num_aces is a u16 read from le16_to_cpu(parent_pdacl->num_aces) without checking that it is consistent with the declared pdacl_size. An authenticated client whose
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:d2d1f02d133fcd8d05c185669d9ad602bc8d099ea4565604c9046c48e049002d
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":"unaffected","product":"Linux","programFiles":["fs/smb/server/smbacl.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"063a7409b0de46d7c770b65bb0338e6fdb3b1f0a","status":"affected","version":"e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9","versionType":"git"},{"lessThan":"3e5360b422dd741cb315654a191fa73869a37414","status":"affected","version":"e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9","versionType":"git"},{"lessThan":"59c32abaaec9cdd6164811c7e864e72f7554b82d","status":"affected","version":"e2f34481b24db2fd634b5ed…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:71d39747262397aa32df022c20b76a91eaff9bee9075ca13afd3dac26d959f40 · sha256:928b77b815133e7e… · /containers/cna/affected/0

{"defaultStatus":"affected","product":"Linux","programFiles":["fs/smb/server/smbacl.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":"6.12.*","status":"unaffected","version":"6.12.84","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.25","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.2","versionType":"semver"},{"lessThanOr…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:71d39747262397aa32df022c20b76a91eaff9bee9075ca13afd3dac26d959f40 · sha256:928b77b815133e7e… · /containers/cna/affected/1

Affected products and versions

2 source assertions
{"defaultStatus":"unaffected","product":"Linux","programFiles":["fs/smb/server/smbacl.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"063a7409b0de46d7c770b65bb0338e6fdb3b1f0a","status":"affected","version":"e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9","versionType":"git"},{"lessThan":"3e5360b422dd741cb315654a191fa73869a37414","status":"affected","version":"e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9","versionType":"git"},{"lessThan":"59c32abaaec9cdd6164811c7e864e72f7554b82d","status":"affected","version":"e2f34481b24db2fd634b5ed…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:71d39747262397aa32df022c20b76a91eaff9bee9075ca13afd3dac26d959f40 · sha256:928b77b815133e7e… · /containers/cna/affected/0
{"defaultStatus":"affected","product":"Linux","programFiles":["fs/smb/server/smbacl.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":"6.12.*","status":"unaffected","version":"6.12.84","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.25","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.2","versionType":"semver"},{"lessThanOr…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:71d39747262397aa32df022c20b76a91eaff9bee9075ca13afd3dac26d959f40 · sha256:928b77b815133e7e… · /containers/cna/affected/1

Provider-owned CVSS observations

1 source assertion
{"metric":{"baseScore":8.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/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:v2:71d39747262397aa32df022c20b76a91eaff9bee9075ca13afd3dac26d959f40 · sha256:928b77b815133e7e… · /containers/cna/metrics/0/cvssV3_1

Source references

4 source assertions
{"url":"https://git.kernel.org/stable/c/063a7409b0de46d7c770b65bb0338e6fdb3b1f0a"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:71d39747262397aa32df022c20b76a91eaff9bee9075ca13afd3dac26d959f40 · sha256:928b77b815133e7e… · /containers/cna/references/0
{"url":"https://git.kernel.org/stable/c/3e4e2ea2a781018ed5d75f969e3e5606beb66e48"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:71d39747262397aa32df022c20b76a91eaff9bee9075ca13afd3dac26d959f40 · sha256:928b77b815133e7e… · /containers/cna/references/3
{"url":"https://git.kernel.org/stable/c/3e5360b422dd741cb315654a191fa73869a37414"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:71d39747262397aa32df022c20b76a91eaff9bee9075ca13afd3dac26d959f40 · sha256:928b77b815133e7e… · /containers/cna/references/1
{"url":"https://git.kernel.org/stable/c/59c32abaaec9cdd6164811c7e864e72f7554b82d"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:71d39747262397aa32df022c20b76a91eaff9bee9075ca13afd3dac26d959f40 · sha256:928b77b815133e7e… · /containers/cna/references/2

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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