net/rds: fix tcp stream corruption with large pages

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Summary

CVECVE-2026-97954
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-25 11:17:23 UTC
Updated2026-09-25 11:17:23 UTC
DescriptionIn 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.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 7875e18e09961d29f30424c5e2e48e704dc3789b ef3565a418b8309589fe9b5df098a892c9146b06 git Not specified
CNA Linux Linux affected 7875e18e09961d29f30424c5e2e48e704dc3789b 8cbfeb54bf781d9693778aaba133bb58c0285332 git Not specified
CNA Linux Linux affected 7875e18e09961d29f30424c5e2e48e704dc3789b f4649a716be20ef9272f97a166dea1825ba5b554 git Not specified
CNA Linux Linux affected 7875e18e09961d29f30424c5e2e48e704dc3789b 2ac09b5353fe6858411fdc8c6efa60d832e20f13 git Not specified
CNA Linux Linux affected 2.6.30 Not specified
CNA Linux Linux unaffected 2.6.30 semver Not specified
CNA Linux Linux unaffected 6.12.111 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.53 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.7 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc3 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/f4649a716be20ef9272f97a166dea1825ba5b554 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/2ac09b5353fe6858411fdc8c6efa60d832e20f13 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ef3565a418b8309589fe9b5df098a892c9146b06 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/8cbfeb54bf781d9693778aaba133bb58c0285332 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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