CVE-2026-89528svcrdma: Reject Read lists that exceed the page budget
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 19, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | 026d958b38c628a1b4ced534808945365e2747a5 builds before 1a3af2262cb384112ef38632de4690682be528b4; from 026d958b38c628a1b4ced534808945365e2747a5 before 465f511f59a0fa7a80d5d1073c4b24f28ea38f58; 026d958b38c628a1b4ced534808945365e2747a5 builds before 0ca487abb3bdf581851664b5db21f364caf57682 | CNA record |
References
- https://git.kernel.org/stable/c/1a3af2262cb384112ef38632de4690682be528b4
- https://git.kernel.org/stable/c/465f511f59a0fa7a80d5d1073c4b24f28ea38f58
- https://git.kernel.org/stable/c/0ca487abb3bdf581851664b5db21f364caf57682
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.