Red HatCVE-2026-13087
Red Hat Linux kernel: out-of-bounds write
High8.8CVE-2026-13087 · Published Sep 22, 2026
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.
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| Red Hat Enterprise Linux 10 Product | all versions | No fix yet |
| Red Hat Enterprise Linux 6 Product | all versions | No fix yet |
| Red Hat Enterprise Linux 7 Product | all versions | No fix yet |
| all versions | No fix yet | |
| Red Hat Enterprise Linux 8 Product | all versions | No fix yet |
| all versions | No fix yet | |
| Red Hat Enterprise Linux 9 Product | all versions | No fix yet |
| all versions | No fix yet | |
| Red Hat Enterprise Linux for NVIDIA 26 Product | all versions | No fix yet |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-787
More Red Hat advisories
All Red Hat| Date | Advisory | Severity | Fixed in |
|---|---|---|---|
| Sep 22 | Red Hat rpcbind. This vulnerability: denial of service | High7.5 | No fix yet |
| Sep 22 | Red Hat SSSD.: improper permission handling | Medium5.4 | No fix yet |
| Sep 22 | Red Hat libstdc++. An integer overflow can occur: integer overflow | High7.7 | No fix yet |
| Sep 22 | Red Hat Enterprise Linux 10: heap buffer overflow | High7.4 | No fix yet |
| Sep 22 | Red Hat Kerberos federation provider of Keycloak: authentication bypass | Medium6.8 | No fix yet |
| Sep 21 | Red Hat libstoragemgmt: buffer overflow | Medium5.5 | No fix yet |