High severity · published Sep 11, 2026
CVE-2026-89528
svcrdma: Reject Read lists that exceed the page budget
7.5
CVSS
0.7%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 51% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LI
Linux · Linux
026d958b38c628a1b4ced534808945365e2747a5 before beb4e9801f6362436102acc4cc5304b7324f9365; 026d958b38c628a1b4ced534808945365e2747a5 before e70fdb121171c3eb0ac34eb545721828cd737717; 026d958b38c628a1b4ced534808945365e2747a5 before 1a3af2262cb384112ef38632de4690682be528b4; 026d958b38c628a1b4ced534808945365e2747a5 before 465f511f59a0fa7a80d5d1073c4b24f28ea38f58; 026d958b38c628a1b4ced534808945365e2747a5 before 0ca487abb3bdf581851664b5db21f364caf57682; 4.13 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-89528
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-89528
git.kernel.org
https://git.kernel.org/stable/c/0ca487abb3bdf581851664b5db21f364caf57682
git.kernel.org
https://git.kernel.org/stable/c/1a3af2262cb384112ef38632de4690682be528b4
git.kernel.org
https://git.kernel.org/stable/c/465f511f59a0fa7a80d5d1073c4b24f28ea38f58
git.kernel.org
https://git.kernel.org/stable/c/beb4e9801f6362436102acc4cc5304b7324f9365
git.kernel.org
https://git.kernel.org/stable/c/e70fdb121171c3eb0ac34eb545721828cd737717
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