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CVE PROGRAM SOURCE RECORD7.5 High

CVE-2026-89528

svcrdma: Reject Read lists that exceed the page budget

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: svcrdma: Reject Read lists that exceed the page budget Individual Read segment lengths are validated at decode time, but nothing prevents a requester from sending multiple segments whose cumulative length exceeds the rq_pages array budget. When one segment fills the page array exactly, the runtime guard in svc_rdma_build_read_segment() is bypassed because len reaches zero. A subsequent segment then accesses the NULL sentinel slot at rq_pages[rq_maxpages], resulting in a NULL pointer dereference during DMA mapping. Accumulate pages across all Read segments and reject the message at decode time when the total would overflow the page budget.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 026d958b38c628a1b4ced534808945365e2747a5 to < 08aa4162df91880a79be744aaa9570b04d4875c4affected
  • 026d958b38c628a1b4ced534808945365e2747a5 to < beb4e9801f6362436102acc4cc5304b7324f9365affected
  • 026d958b38c628a1b4ced534808945365e2747a5 to < e70fdb121171c3eb0ac34eb545721828cd737717affected
  • 026d958b38c628a1b4ced534808945365e2747a5 to < 1a3af2262cb384112ef38632de4690682be528b4affected
  • 026d958b38c628a1b4ced534808945365e2747a5 to < 465f511f59a0fa7a80d5d1073c4b24f28ea38f58affected
  • 026d958b38c628a1b4ced534808945365e2747a5 to < 0ca487abb3bdf581851664b5db21f364caf57682affected

Linux Linux

Default version status: affected

  • 4.13affected
  • 0 to < 4.13unaffected
  • 6.1.191 to ≤ 6.1.*unaffected
  • 6.6.160 to ≤ 6.6.*unaffected
  • 6.12.114 to ≤ 6.12.*unaffected
  • 6.18.51 to ≤ 6.18.*unaffected
  • 7.2.4 to ≤ 7.2.*unaffected
  • 7.3 to ≤ *unaffected

References