CVE-2026-13087— Kernel: heap out-of-bounds write in the linux kernel rpc-over-rdma server reply path...
Quick assessment
Affected
Red Hat Red Hat Enterprise Linux 10
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
A heap out-of-bounds write vulnerability was found in the Linux kernel's RPC-over-RDMA server reply path in net/sunrpc/xprtrdma/svc_rdma_sendto.c. When a crafted RPC-over-RDMA client sends a large NFS READ request with an empty Write list and no Reply chunk, t
Affected Version Matrix 9
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | any |
affected |
| Red Hat | Red Hat Enterprise Linux 6 | any |
affected |
| Red Hat | Red Hat Enterprise Linux 7 | any |
affected |
any |
affected | ||
| Red Hat | Red Hat Enterprise Linux 8 | any |
affected |
any |
affected | ||
| Red Hat | Red Hat Enterprise Linux 9 | any |
affected |
any |
affected | ||
| Red Hat | Red Hat Enterprise Linux for NVIDIA 26 | any |
affected |
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I. Basic Information for CVE-2026-13087
Vulnerability Information
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Vulnerability Title
Kernel: heap out-of-bounds write in the linux kernel rpc-over-rdma server reply path...
Source: CVE Program / CVE List V5
Vulnerability Description
A heap out-of-bounds write vulnerability was found in the Linux kernel's RPC-over-RDMA server reply path in net/sunrpc/xprtrdma/svc_rdma_sendto.c. When a crafted RPC-over-RDMA client sends a large NFS READ request with an empty Write list and no Reply chunk, the server linearizes the entire multi-page reply into a fixed-size 4096-byte heap buffer without bounds checking, resulting in a kernel heap overflow. This can lead to denial of service via kernel crash or potential code execution through corruption of adjacent kernel heap objects.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | - |
cpe:/o:redhat:enterprise_linux:10
|
|
| Red Hat | Red Hat Enterprise Linux 6 | - |
cpe:/o:redhat:enterprise_linux:6
|
|
| Red Hat | Red Hat Enterprise Linux 7 | - |
cpe:/o:redhat:enterprise_linux:7
|
|
| Red Hat | Red Hat Enterprise Linux 7 | - |
cpe:/o:redhat:enterprise_linux:7
|
|
| Red Hat | Red Hat Enterprise Linux 8 | - |
cpe:/o:redhat:enterprise_linux:8
|
|
| Red Hat | Red Hat Enterprise Linux 8 | - |
cpe:/o:redhat:enterprise_linux:8
|
|
| Red Hat | Red Hat Enterprise Linux 9 | - |
cpe:/o:redhat:enterprise_linux:9
|
|
| Red Hat | Red Hat Enterprise Linux 9 | - |
cpe:/o:redhat:enterprise_linux:9
|
|
| Red Hat | Red Hat Enterprise Linux for NVIDIA 26 | - |
cpe:/a:redhat:enterprise_linux_nvidia:
|
|
II. Public POCs for CVE-2026-13087
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Other References for CVE-2026-13087 (2)
Same Patch Batch · Red Hat · 2026-09-22 · 6 CVEs total
| CVE-2026-95619 | 7.7 HIGH | Gcc: libstdc++ integer overflow in `new` operator |
| CVE-2026-94640 | 7.5 HIGH | Rpcbind: unbounded memory allocation in rpcbind statistics tracking allows unauthenticated |
| CVE-2026-95508 | 7.4 HIGH | Libslirp: libslirp: heap buffer overflow in dhcpv6/tftp response builders on small interfa |
| CVE-2026-95503 | 6.8 MEDIUM | Keycloak-services: keycloak-services: potential kdc spoofing bypass when kerberos password |
| CVE-2026-90462 | 5.4 MEDIUM | Sssd: sssd: fail-open in ldap ppolicy access check allows continued authorization |
IV. Related Vulnerabilities
Same product: Red Hat Enterprise Linux 10
-
CVE-2026-90462
Sssd: sssd: fail-open in ldap ppolicy access check allows co -
CVE-2026-94640
Rpcbind: unbounded memory allocation in rpcbind statistics t -
CVE-2026-95508
Libslirp: libslirp: heap buffer overflow in dhcpv6/tftp resp -
CVE-2026-93433
Libstoragemgmt: libstoragemgmt: denial of service via stack -
CVE-2026-92382
Usbredir: usbredir: unbounded iso_packet_desc[] index in usb
Same vendor: Red Hat
-
CVE-2026-90462
Sssd: sssd: fail-open in ldap ppolicy access check allows co -
CVE-2026-94640
Rpcbind: unbounded memory allocation in rpcbind statistics t -
CVE-2026-95619
Gcc: libstdc++ integer overflow in `new` operator -
CVE-2026-95508
Libslirp: libslirp: heap buffer overflow in dhcpv6/tftp resp -
CVE-2026-95503
Keycloak-services: keycloak-services: potential kdc spoofing
Same weakness: CWE-787
-
CVE-2026-87121
Out-of-bounds write in lwIP TCP/IP Stack MQTT Client Applica -
CVE-2026-83963
Substance3D - Modeler | Out-of-bounds Write (CWE-787) -
CVE-2026-81998
Substance3D - Modeler | Out-of-bounds Write (CWE-787) -
CVE-2026-79906
Substance3D - Modeler | Out-of-bounds Write (CWE-787) -
CVE-2026-75658
Bridge | Out-of-bounds Write (CWE-787)
V. Comments for CVE-2026-13087
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