In the Linux kernel, the following vulnerability has been resolved:
SUNRPC: Fix a slow server-side memory leak with RPC-over-TCP
Jan Schunk reports that his small NFS servers suffer from memory exhaustion after just a few days. A bisect shows that commit e18e157bb5c8 ("SUNRPC: Send RPC message on TCP with a single sock_sendmsg() call") is the first bad commit.
That commit assumed that sock_sendmsg() releases all the pages in the underlying bio_vec array, but the reality is that it doesn't. svc_xprt_release() releases the rqst's response pages, but the record marker page fragment isn't one of those, so it is never released.
This is a narrow fix that can be applied to stable kernels. A more extensive fix is in the works.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux | Jul 27, 2026 | Jul 27, 2026 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | May 19, 2024 |
| Ubuntu | — | Upgrade linux-image-6.8.0-1007-raspiUpgrade linux-image-oem-24.04Upgrade linux-image-virtualUpgrade linux-image-generic-hwe-24.04Upgrade linux-image-gcpUpgrade linux-image-6.8.0-1008-oracleUpgrade linux-image-6.8.0-1007-intelUpgrade linux-image-oracleUpgrade linux-image-6.8.0-1008-ibmUpgrade linux-image-genericUpgrade linux-image-intelUpgrade linux-image-oem-24.04aUpgrade linux-image-gkeUpgrade linux-image-6.8.0-1006-gkeUpgrade linux-image-oracle-64kUpgrade linux-image-ibm-classicUpgrade linux-image-virtual-hwe-24.04Upgrade linux-image-6.8.0-1010-azureUpgrade linux-image-6.8.0-1008-oracle-64kUpgrade linux-image-generic-64kUpgrade linux-image-6.8.0-38-genericUpgrade linux-image-kvmUpgrade linux-image-nvidiaUpgrade linux-image-nvidia-64kUpgrade linux-image-6.8.0-1009-nvidia-64kUpgrade linux-image-6.8.0-1011-awsUpgrade linux-image-6.8.0-1010-azure-fdeUpgrade linux-image-ibm-lts-24.04Upgrade linux-image-6.8.0-38-lowlatencyUpgrade linux-image-generic-lpaeUpgrade linux-image-awsUpgrade linux-image-6.8.0-1010-gcpUpgrade linux-image-azureUpgrade linux-image-6.8.0-1009-nvidiaUpgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-lowlatencyUpgrade linux-image-ibmUpgrade linux-image-6.8.0-38-lowlatency-64kUpgrade linux-image-raspiUpgrade linux-image-6.8.0-1008-oemUpgrade linux-image-6.8.0-38-generic-64kUpgrade linux-image-lowlatency-64kUpgrade linux-image-azure-fde | Jul 12, 2024 | May 19, 2024 |
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