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CVE-2026-31773

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: SMP: derive legacy responder STK authentication from MITM state The legacy responder path in smp_random() currently labels the stored STK as authenticated whenever pending_sec_level is BT_SECURITY_HIGH. That reflects what the local service requested, not what the pairing flow actually achieved. For Just Works/Confirm legacy pairing, SMP_FLAG_MITM_AUTH stays clear and the resulting STK should remain unauthenticated
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:fea4ce2f11f74dc6716205468ad466adf045861594a645adf018723707de0741
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":["net/bluetooth/smp.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"9a38659a3d06080715691bd3139f9c4b61f688e3","status":"affected","version":"fff3490f47810e2d34b91fb9e31103e923b11c2f","versionType":"git"},{"lessThan":"667f44f1392df6482483756458c48670e579e9ff","status":"affected","version":"fff3490f47810e2d34b91fb9e31103e923b11c2f","versionType":"git"},{"lessThan":"929db734d12db41ca5f95424db4612397f1bd4a7","status":"affected","version":"fff3490f47810e2d34b91fb9e3…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:382ded942da0c0712fed9e40f827f8fa530417fd49572a957733c8fbca34597d · sha256:c2c5b02925c2107f… · /containers/cna/affected/0

{"defaultStatus":"affected","product":"Linux","programFiles":["net/bluetooth/smp.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"3.16"},{"lessThan":"3.16","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.253","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.203","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.168","versionType":"semver"},{"lessThanO…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:382ded942da0c0712fed9e40f827f8fa530417fd49572a957733c8fbca34597d · sha256:c2c5b02925c2107f… · /containers/cna/affected/1

Affected products and versions

2 source assertions
{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/bluetooth/smp.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"9a38659a3d06080715691bd3139f9c4b61f688e3","status":"affected","version":"fff3490f47810e2d34b91fb9e31103e923b11c2f","versionType":"git"},{"lessThan":"667f44f1392df6482483756458c48670e579e9ff","status":"affected","version":"fff3490f47810e2d34b91fb9e31103e923b11c2f","versionType":"git"},{"lessThan":"929db734d12db41ca5f95424db4612397f1bd4a7","status":"affected","version":"fff3490f47810e2d34b91fb9e3…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:382ded942da0c0712fed9e40f827f8fa530417fd49572a957733c8fbca34597d · sha256:c2c5b02925c2107f… · /containers/cna/affected/0
{"defaultStatus":"affected","product":"Linux","programFiles":["net/bluetooth/smp.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"3.16"},{"lessThan":"3.16","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.253","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.203","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.168","versionType":"semver"},{"lessThanO…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:382ded942da0c0712fed9e40f827f8fa530417fd49572a957733c8fbca34597d · sha256:c2c5b02925c2107f… · /containers/cna/affected/1

Provider-owned CVSS observations

1 source assertion
{"metric":{"baseScore":8.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:A/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:v2:382ded942da0c0712fed9e40f827f8fa530417fd49572a957733c8fbca34597d · sha256:c2c5b02925c2107f… · /containers/cna/metrics/0/cvssV3_1

Source references

8 source assertions
{"url":"https://git.kernel.org/stable/c/061ee71ac6b03c9f8432fe49538c3682bfcf4cf3"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:382ded942da0c0712fed9e40f827f8fa530417fd49572a957733c8fbca34597d · sha256:c2c5b02925c2107f… · /containers/cna/references/5
{"url":"https://git.kernel.org/stable/c/0afc846bd80073ffcd2b8040f2b2fafaea3d9f72"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:382ded942da0c0712fed9e40f827f8fa530417fd49572a957733c8fbca34597d · sha256:c2c5b02925c2107f… · /containers/cna/references/4
{"url":"https://git.kernel.org/stable/c/20756fec2f0108cb88e815941f1ffff88dc286fe"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:382ded942da0c0712fed9e40f827f8fa530417fd49572a957733c8fbca34597d · sha256:c2c5b02925c2107f… · /containers/cna/references/7
{"url":"https://git.kernel.org/stable/c/667f44f1392df6482483756458c48670e579e9ff"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:382ded942da0c0712fed9e40f827f8fa530417fd49572a957733c8fbca34597d · sha256:c2c5b02925c2107f… · /containers/cna/references/1
{"url":"https://git.kernel.org/stable/c/929db734d12db41ca5f95424db4612397f1bd4a7"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:382ded942da0c0712fed9e40f827f8fa530417fd49572a957733c8fbca34597d · sha256:c2c5b02925c2107f… · /containers/cna/references/2
{"url":"https://git.kernel.org/stable/c/9a38659a3d06080715691bd3139f9c4b61f688e3"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:382ded942da0c0712fed9e40f827f8fa530417fd49572a957733c8fbca34597d · sha256:c2c5b02925c2107f… · /containers/cna/references/0
{"url":"https://git.kernel.org/stable/c/9a6d0db176f082685e0b6149700c0baf3ce2aa8b"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:382ded942da0c0712fed9e40f827f8fa530417fd49572a957733c8fbca34597d · sha256:c2c5b02925c2107f… · /containers/cna/references/6
{"url":"https://git.kernel.org/stable/c/b1c6a8e554a39b222c0879a288ea98e338fc4d77"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:382ded942da0c0712fed9e40f827f8fa530417fd49572a957733c8fbca34597d · sha256:c2c5b02925c2107f… · /containers/cna/references/3

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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