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CVE-2026-63909

In the Linux kernel, the following vulnerability has been resolved: ksmbd: OOB read regression in smb_check_perm_dacl() ACE-walk loops Commit d07b26f39246 ("ksmbd: require minimum ACE size in smb_check_perm_dacl()") introduced a transposed bounds check: if (offsetof(struct smb_ace, sid) + aces_size < CIFS_SID_BASE_SIZE) Since offsetof(..sid) is 8 and CIFS_SID_BASE_SIZE is 8, this evaluates to `aces_size < 0`. Because `aces_size` is always non-negative, this check becomes dead code and ne
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:80e6d4dae0938e53ce5e3a35971b22795d1523f958fb43278fce026742238584
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":"6.6.143","status":"affected","version":"6.6.140","versionType":"semver"},{"lessThan":"6.12.93","status":"affected","version":"6.12.84","versionType":"semver"},{"lessThan":"6.18.35","status":"affected","version":"6.18.25","versionType":"semver"},{"lessThan":"7.0.12","status":"affected","version":"7.0.2","versionType":"semver"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:b17f79fcb023e3184e14e2e4f8c38f83280d78e88c873ba110ba4bb812fdcae6 · sha256:a5bfed2b5e122226… · /containers/cna/affected/1

{"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":"5500ba1d410aed1eded3eb04a76b10cfb4409334","status":"affected","version":"282cbbb476b9f35793452bc461934af4c7eca169","versionType":"git"},{"lessThan":"f6324b4240cf0b26a84c33f68a1222d727ff4af2","status":"affected","version":"f20adc4ef7428bc485ee83fd1a592252fb87718b","versionType":"git"},{"lessThan":"0fe08c5776a798f46df1fd74b331be26bdd644d6","status":"affected","version":"325d4ac11f526cb8964cff1…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:b17f79fcb023e3184e14e2e4f8c38f83280d78e88c873ba110ba4bb812fdcae6 · sha256:a5bfed2b5e122226… · /containers/cna/affected/0

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":"6.6.143","status":"affected","version":"6.6.140","versionType":"semver"},{"lessThan":"6.12.93","status":"affected","version":"6.12.84","versionType":"semver"},{"lessThan":"6.18.35","status":"affected","version":"6.18.25","versionType":"semver"},{"lessThan":"7.0.12","status":"affected","version":"7.0.2","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:b17f79fcb023e3184e14e2e4f8c38f83280d78e88c873ba110ba4bb812fdcae6 · sha256:a5bfed2b5e122226… · /containers/cna/affected/1
{"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":"5500ba1d410aed1eded3eb04a76b10cfb4409334","status":"affected","version":"282cbbb476b9f35793452bc461934af4c7eca169","versionType":"git"},{"lessThan":"f6324b4240cf0b26a84c33f68a1222d727ff4af2","status":"affected","version":"f20adc4ef7428bc485ee83fd1a592252fb87718b","versionType":"git"},{"lessThan":"0fe08c5776a798f46df1fd74b331be26bdd644d6","status":"affected","version":"325d4ac11f526cb8964cff1…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:b17f79fcb023e3184e14e2e4f8c38f83280d78e88c873ba110ba4bb812fdcae6 · sha256:a5bfed2b5e122226… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"baseScore":8.1,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:b17f79fcb023e3184e14e2e4f8c38f83280d78e88c873ba110ba4bb812fdcae6 · sha256:a5bfed2b5e122226… · /containers/cna/metrics/0/cvssV3_1

Source references

7 source assertions
{"url":"https://git.kernel.org/stable/c/0e60dafe97eca61721f3db456f97d97a80c6c8ae"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:b17f79fcb023e3184e14e2e4f8c38f83280d78e88c873ba110ba4bb812fdcae6 · sha256:a5bfed2b5e122226… · /containers/cna/references/6
{"url":"https://git.kernel.org/stable/c/0fe08c5776a798f46df1fd74b331be26bdd644d6"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:b17f79fcb023e3184e14e2e4f8c38f83280d78e88c873ba110ba4bb812fdcae6 · sha256:a5bfed2b5e122226… · /containers/cna/references/2
{"url":"https://git.kernel.org/stable/c/4f7c131d2bdd7cd64b96f60d10be5ea72253f520"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:b17f79fcb023e3184e14e2e4f8c38f83280d78e88c873ba110ba4bb812fdcae6 · sha256:a5bfed2b5e122226… · /containers/cna/references/5
{"url":"https://git.kernel.org/stable/c/5500ba1d410aed1eded3eb04a76b10cfb4409334"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:b17f79fcb023e3184e14e2e4f8c38f83280d78e88c873ba110ba4bb812fdcae6 · sha256:a5bfed2b5e122226… · /containers/cna/references/0
{"url":"https://git.kernel.org/stable/c/94215d55b09445993929f4fc966061d61de74929"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:b17f79fcb023e3184e14e2e4f8c38f83280d78e88c873ba110ba4bb812fdcae6 · sha256:a5bfed2b5e122226… · /containers/cna/references/4
{"url":"https://git.kernel.org/stable/c/d333af32e4451285e427f2d9c29de3a39f6f6d48"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:b17f79fcb023e3184e14e2e4f8c38f83280d78e88c873ba110ba4bb812fdcae6 · sha256:a5bfed2b5e122226… · /containers/cna/references/3
{"url":"https://git.kernel.org/stable/c/f6324b4240cf0b26a84c33f68a1222d727ff4af2"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:b17f79fcb023e3184e14e2e4f8c38f83280d78e88c873ba110ba4bb812fdcae6 · sha256:a5bfed2b5e122226… · /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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