CVE-2026-97954

net/rds: fix tcp stream corruption with large pages

State: Published
Severity: Not scored
Published: Sep 25, 2026
Updated: Oct 19, 2026
Reserved: Sep 25, 2026

Description

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	7875e18e09961d29f30424c5e2e48e704dc3789b to before 7d7705ce73eac1de1146706d887bc969a48ebb6dAffected 7875e18e09961d29f30424c5e2e48e704dc3789b to before 3230961a72b312d0e47101d1428084d0a02bff52Affected 7875e18e09961d29f30424c5e2e48e704dc3789b to before ee74a4b42e3a2f9635ba376be9e58311322eebe4Affected 7875e18e09961d29f30424c5e2e48e704dc3789b to before 348492de88bc6ea06b6f3dd544a7a00d908a807bAffected 7875e18e09961d29f30424c5e2e48e704dc3789b to before ef3565a418b8309589fe9b5df098a892c9146b06Affected 7875e18e09961d29f30424c5e2e48e704dc3789b to before 8cbfeb54bf781d9693778aaba133bb58c0285332Affected 7875e18e09961d29f30424c5e2e48e704dc3789b to before f4649a716be20ef9272f97a166dea1825ba5b554Affected 7875e18e09961d29f30424c5e2e48e704dc3789b to before 2ac09b5353fe6858411fdc8c6efa60d832e20f13Affected
LinuxLinux	2.6.30Affected before 2.6.30Not affected 5.10.271 through 5.10.Not affected 5.15.222 through 5.15.Not affected 6.1.189 through 6.1.Not affected 6.6.158 through 6.6.Not affected 6.12.111 through 6.12.Not affected 6.18.53 through 6.18.Not affected 7.2.7 through 7.2.*Not affected 7.3 and laterNot affected

Product

Versions

LinuxLinux

7875e18e09961d29f30424c5e2e48e704dc3789b to before 7d7705ce73eac1de1146706d887bc969a48ebb6dAffected
7875e18e09961d29f30424c5e2e48e704dc3789b to before 3230961a72b312d0e47101d1428084d0a02bff52Affected
7875e18e09961d29f30424c5e2e48e704dc3789b to before ee74a4b42e3a2f9635ba376be9e58311322eebe4Affected
7875e18e09961d29f30424c5e2e48e704dc3789b to before 348492de88bc6ea06b6f3dd544a7a00d908a807bAffected
7875e18e09961d29f30424c5e2e48e704dc3789b to before ef3565a418b8309589fe9b5df098a892c9146b06Affected
7875e18e09961d29f30424c5e2e48e704dc3789b to before 8cbfeb54bf781d9693778aaba133bb58c0285332Affected
7875e18e09961d29f30424c5e2e48e704dc3789b to before f4649a716be20ef9272f97a166dea1825ba5b554Affected
7875e18e09961d29f30424c5e2e48e704dc3789b to before 2ac09b5353fe6858411fdc8c6efa60d832e20f13Affected

LinuxLinux

2.6.30Affected
before 2.6.30Not affected
5.10.271 through 5.10.*Not affected
5.15.222 through 5.15.*Not affected
6.1.189 through 6.1.*Not affected
6.6.158 through 6.6.*Not affected
6.12.111 through 6.12.*Not affected
6.18.53 through 6.18.*Not affected
7.2.7 through 7.2.*Not affected
7.3 and laterNot affected

References

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