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CVE-2026-23327

In the Linux kernel, the following vulnerability has been resolved: cxl/mbox: validate payload size before accessing contents in cxl_payload_from_user_allowed() cxl_payload_from_user_allowed() casts and dereferences the input payload without first verifying its size. When a raw mailbox command is sent with an undersized payload (ie: 1 byte for CXL_MBOX_OP_CLEAR_LOG, which expects a 16-byte UUID), uuid_equal() reads past the allocated buffer, triggering a KASAN splat: BUG: KASAN: slab-out-of-b
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:ec4cbf1ad9155dd055d55f94659cffbe58fb6b1f93ba35f7ff066a341a1b6323
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":["drivers/cxl/core/mbox.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"dc184ac2f0ba77ae19725ee06ad3ab36bb9d1f61","status":"affected","version":"6179045ccc0c6229dc449afc1701dc7fbd40571f","versionType":"git"},{"lessThan":"7c8a7b7f063b7e7ae9bba4cbaa14a5d2fe3a55e1","status":"affected","version":"6179045ccc0c6229dc449afc1701dc7fbd40571f","versionType":"git"},{"lessThan":"60b5d1f68338aff2c5af0113f04aefa7169c50c2","status":"affected","version":"6179045ccc0c6229dc449a…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:a597d904164f67ceb713ca1c23b2955606b1edc8a941f0d133be1fc41509e34c · sha256:b128aa42f07255e3… · /containers/cna/affected/0

{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/cxl/core/mbox.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.19"},{"lessThan":"5.19","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.34","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.7","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.0","versionType":"original_commit_for_fix"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:a597d904164f67ceb713ca1c23b2955606b1edc8a941f0d133be1fc41509e34c · sha256:b128aa42f07255e3… · /containers/cna/affected/1

Affected products and versions

2 source assertions
{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/cxl/core/mbox.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"dc184ac2f0ba77ae19725ee06ad3ab36bb9d1f61","status":"affected","version":"6179045ccc0c6229dc449afc1701dc7fbd40571f","versionType":"git"},{"lessThan":"7c8a7b7f063b7e7ae9bba4cbaa14a5d2fe3a55e1","status":"affected","version":"6179045ccc0c6229dc449afc1701dc7fbd40571f","versionType":"git"},{"lessThan":"60b5d1f68338aff2c5af0113f04aefa7169c50c2","status":"affected","version":"6179045ccc0c6229dc449a…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:a597d904164f67ceb713ca1c23b2955606b1edc8a941f0d133be1fc41509e34c · sha256:b128aa42f07255e3… · /containers/cna/affected/0
{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/cxl/core/mbox.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.19"},{"lessThan":"5.19","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.34","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.7","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.0","versionType":"original_commit_for_fix"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:a597d904164f67ceb713ca1c23b2955606b1edc8a941f0d133be1fc41509e34c · sha256:b128aa42f07255e3… · /containers/cna/affected/1

Source references

3 source assertions
{"url":"https://git.kernel.org/stable/c/60b5d1f68338aff2c5af0113f04aefa7169c50c2"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a597d904164f67ceb713ca1c23b2955606b1edc8a941f0d133be1fc41509e34c · sha256:b128aa42f07255e3… · /containers/cna/references/2
{"url":"https://git.kernel.org/stable/c/7c8a7b7f063b7e7ae9bba4cbaa14a5d2fe3a55e1"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a597d904164f67ceb713ca1c23b2955606b1edc8a941f0d133be1fc41509e34c · sha256:b128aa42f07255e3… · /containers/cna/references/1
{"url":"https://git.kernel.org/stable/c/dc184ac2f0ba77ae19725ee06ad3ab36bb9d1f61"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a597d904164f67ceb713ca1c23b2955606b1edc8a941f0d133be1fc41509e34c · sha256:b128aa42f07255e3… · /containers/cna/references/0

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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