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CVE-2026-64291

In the Linux kernel, the following vulnerability has been resolved: iommufd: Set veventq_depth upper bound iommufd_veventq_alloc() accepts any !0 veventq_depth from userspace, with an upper bound at U32_MAX. This leaves a vulnerability where userspace can allocate excessively large queues to exhaust kernel memory reserves. Cap the veventq_depth (maximum number of entries) to 1 << 19, matching the maximum number of entries in the SMMUv3 EVTQ (the largest use case today).
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:09e834f9a8775586f82553ec3789e677d1633d0f58bc7ed4730341055fdcdfc8
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":["drivers/iommu/iommufd/eventq.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.15"},{"lessThan":"6.15","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.39","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.4","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2-rc1","versionType":"original_commit_fo…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:69341fc9fc009c644728396f5cedec103d445694a7cf5db3f2fb49ab1f44da63 · sha256:515326d7fab6ea3a… · /containers/cna/affected/1

{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/iommu/iommufd/eventq.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"f565297edf316016be4a1a9e2eb9f39359313f43","status":"affected","version":"e36ba5ab808ef6237c3148d469c8238674230e2b","versionType":"git"},{"lessThan":"e7b5e55652746b1221b9c10ff80eae8a154101ba","status":"affected","version":"e36ba5ab808ef6237c3148d469c8238674230e2b","versionType":"git"},{"lessThan":"6ebf2eb46fbd5b40393ff8fbb847ba96925beaff","status":"affected","version":"e36ba5ab808ef62…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:69341fc9fc009c644728396f5cedec103d445694a7cf5db3f2fb49ab1f44da63 · sha256:515326d7fab6ea3a… · /containers/cna/affected/0

Affected products and versions

2 source assertions
{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/iommu/iommufd/eventq.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.15"},{"lessThan":"6.15","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.39","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.4","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2-rc1","versionType":"original_commit_fo…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:69341fc9fc009c644728396f5cedec103d445694a7cf5db3f2fb49ab1f44da63 · sha256:515326d7fab6ea3a… · /containers/cna/affected/1
{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/iommu/iommufd/eventq.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"f565297edf316016be4a1a9e2eb9f39359313f43","status":"affected","version":"e36ba5ab808ef6237c3148d469c8238674230e2b","versionType":"git"},{"lessThan":"e7b5e55652746b1221b9c10ff80eae8a154101ba","status":"affected","version":"e36ba5ab808ef6237c3148d469c8238674230e2b","versionType":"git"},{"lessThan":"6ebf2eb46fbd5b40393ff8fbb847ba96925beaff","status":"affected","version":"e36ba5ab808ef62…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:69341fc9fc009c644728396f5cedec103d445694a7cf5db3f2fb49ab1f44da63 · sha256:515326d7fab6ea3a… · /containers/cna/affected/0

Source references

3 source assertions
{"url":"https://git.kernel.org/stable/c/6ebf2eb46fbd5b40393ff8fbb847ba96925beaff"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:69341fc9fc009c644728396f5cedec103d445694a7cf5db3f2fb49ab1f44da63 · sha256:515326d7fab6ea3a… · /containers/cna/references/2
{"url":"https://git.kernel.org/stable/c/e7b5e55652746b1221b9c10ff80eae8a154101ba"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:69341fc9fc009c644728396f5cedec103d445694a7cf5db3f2fb49ab1f44da63 · sha256:515326d7fab6ea3a… · /containers/cna/references/1
{"url":"https://git.kernel.org/stable/c/f565297edf316016be4a1a9e2eb9f39359313f43"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:69341fc9fc009c644728396f5cedec103d445694a7cf5db3f2fb49ab1f44da63 · sha256:515326d7fab6ea3a… · /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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