CVE-2026-97954

Summary

In the Linux kernel, the following vulnerability has been resolved:

net/rds: fix tcp stream corruption with large pages

rds_message_map_pages() assigns PAGE_SIZE bytes to every scatterlist entry, even when total_len ends in a partial page. The RDS congestion map is defined as 8192 bytes, so on systems with PAGE_SIZE greater than 8192 the scatterlist maps bytes beyond the end of the congestion map. RDS-TCP transmits the SG contents according to those lengths, so the extra bytes become part of the TCP RDS stream and are interpreted as subsequent RDS message headers, corrupting the stream.

Limit the final scatterlist mapping to the number of bytes remaining. This has no effect on systems with a 4K page size and allows RDS-TCP to be used on systems with 16K and larger page sizes.

The RDS selftest, which previously hung on 16K pages, now passes.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux7875e18e09961d29f30424c5e2e48e704dc3789b < 7d7705ce73eac1de1146706d887bc969a48ebb6daffected
LinuxLinux7875e18e09961d29f30424c5e2e48e704dc3789b < 3230961a72b312d0e47101d1428084d0a02bff52affected
LinuxLinux7875e18e09961d29f30424c5e2e48e704dc3789b < ee74a4b42e3a2f9635ba376be9e58311322eebe4affected
LinuxLinux7875e18e09961d29f30424c5e2e48e704dc3789b < 348492de88bc6ea06b6f3dd544a7a00d908a807baffected
LinuxLinux7875e18e09961d29f30424c5e2e48e704dc3789b < ef3565a418b8309589fe9b5df098a892c9146b06affected
LinuxLinux7875e18e09961d29f30424c5e2e48e704dc3789b < 8cbfeb54bf781d9693778aaba133bb58c0285332affected
LinuxLinux7875e18e09961d29f30424c5e2e48e704dc3789b < f4649a716be20ef9272f97a166dea1825ba5b554affected
LinuxLinux7875e18e09961d29f30424c5e2e48e704dc3789b < 2ac09b5353fe6858411fdc8c6efa60d832e20f13affected
LinuxLinux2.6.30affected
LinuxLinux0 < 2.6.30unaffected
LinuxLinux5.10.271 <= 5.10.*unaffected
LinuxLinux5.15.222 <= 5.15.*unaffected
LinuxLinux6.1.189 <= 6.1.*unaffected
LinuxLinux6.6.158 <= 6.6.*unaffected
LinuxLinux6.12.111 <= 6.12.*unaffected
LinuxLinux6.18.53 <= 6.18.*unaffected
LinuxLinux7.2.7 <= 7.2.*unaffected
LinuxLinux7.3-rc3 <= *unaffected

Weaknesses

References