Riskcovery

CVE-2026-53133

RDMA/umem: Fix truncation for block sizes >= 4G

State
Published
Severity
7.8 High
Published
Jun 25, 2026
Updated
Oct 19, 2026
Reserved
Jun 9, 2026

Read the record on cve.org

Description

In the Linux kernel, the following vulnerability has been resolved:

RDMA/umem: Fix truncation for block sizes >= 4G

When the iommu is used the linearization of the mapping can give a single block that is very large split across multiple SG entries.

When __rdma_block_iter_next() reassembles the split SG entries it is overflowing the 32 bit stack values and computed the wrong DMA addresses for blocks after the truncation.

Use the right types to hold DMA addresses.

Scores

CVSSScoreVectorSource
3.17.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HLinux

Weaknesses

  • CWE-190 Integer Overflow or Wraparound

Affected Products

ProductVersions
LinuxLinux
  • a808273a495c657e33281b181fd7fcc2bb28f662 to before 2ff4b7817e5b78070c30f5fb5e678e452a2628b3Affected
  • a808273a495c657e33281b181fd7fcc2bb28f662 to before dee2a49adeeb2a5e16a3fc858fa21b841c519802Affected
  • a808273a495c657e33281b181fd7fcc2bb28f662 to before cc644d5608e3b0dadc970bd6e6aa26b91ea07d0fAffected
  • a808273a495c657e33281b181fd7fcc2bb28f662 to before 8fe0231adebe086c8a459c790944ac026cd99c6eAffected
  • a808273a495c657e33281b181fd7fcc2bb28f662 to before baf8685bcf56dc1efb44b8f6a57c42516e549068Affected
  • a808273a495c657e33281b181fd7fcc2bb28f662 to before afd35fec9297195b759078745549c2671223f24fAffected
  • a808273a495c657e33281b181fd7fcc2bb28f662 to before ac1aad8e1281534ce936c250f68084fc79c5469eAffected
  • a808273a495c657e33281b181fd7fcc2bb28f662 to before 15fe76e23615f502d051ef0768f86babaf08746cAffected
LinuxLinux
  • 5.2Affected
  • before 5.2Not affected
  • 5.10.259 through 5.10.*Not affected
  • 5.15.210 through 5.15.*Not affected
  • 6.1.176 through 6.1.*Not affected
  • 6.6.143 through 6.6.*Not affected
  • 6.12.94 through 6.12.*Not affected
  • 6.18.36 through 6.18.*Not affected
  • 7.0.13 through 7.0.*Not affected
  • 7.1 and laterNot affected

References

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