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CVE-2026-97954

Linux: net/rds: fix tcp stream corruption with large pages

Linux LinuxOperating systems
Open in ThreatlineRecord JSON
CVSS
NoneNot scored
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.18%Chance of exploitation activity in the next 30 days, higher than 6% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in7d7705ce73eac1de1146706d887bc969a48ebb6dAlso 3230961a72b312d0e47101d1428084d0a02bff52, 348492de88bc6ea06b6f3dd544a7a00d908a807b and 2 moreCVE List
Published25 Sep 2026Updated 19 Oct 2026CVE List

What fixes it

  • 7d7705ce73eac1de1146706d887bc969a48ebb6dLinuxCVE List
  • 3230961a72b312d0e47101d1428084d0a02bff52LinuxCVE List
  • 348492de88bc6ea06b6f3dd544a7a00d908a807bLinuxCVE List
  • 8cbfeb54bf781d9693778aaba133bb58c0285332LinuxCVE List
  • 2ac09b5353fe6858411fdc8c6efa60d832e20f13LinuxCVE List

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

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.

Text from CVE List

Affected versions 18

  • Linuxaffected: 7875e18e09961d29f30424c5e2e48e704dc3789b before 7d7705ce73eac1de1146706d887bc969a48ebb6dCVE List
  • Linuxaffected: 7875e18e09961d29f30424c5e2e48e704dc3789b before 3230961a72b312d0e47101d1428084d0a02bff52CVE List
  • Linuxaffected: 7875e18e09961d29f30424c5e2e48e704dc3789b before ee74a4b42e3a2f9635ba376be9e58311322eebe4CVE List
  • Linuxaffected: 7875e18e09961d29f30424c5e2e48e704dc3789b before 348492de88bc6ea06b6f3dd544a7a00d908a807bCVE List
  • Linuxaffected: 7875e18e09961d29f30424c5e2e48e704dc3789b before ef3565a418b8309589fe9b5df098a892c9146b06CVE List
  • Linuxaffected: 7875e18e09961d29f30424c5e2e48e704dc3789b before 8cbfeb54bf781d9693778aaba133bb58c0285332CVE List
  • Linuxaffected: 7875e18e09961d29f30424c5e2e48e704dc3789b before f4649a716be20ef9272f97a166dea1825ba5b554CVE List
  • Linuxaffected: 7875e18e09961d29f30424c5e2e48e704dc3789b before 2ac09b5353fe6858411fdc8c6efa60d832e20f13CVE List
  • Linuxaffected: 2.6.30CVE List
  • Linuxunaffected: all versions before 2.6.30CVE List
  • Linuxunaffected: 5.10.271 through 5.10.*CVE List
  • Linuxunaffected: 5.15.222 through 5.15.*CVE List
  • Linuxunaffected: 6.1.189 through 6.1.*CVE List
  • Linuxunaffected: 6.6.158 through 6.6.*CVE List
  • Linuxunaffected: 6.12.111 through 6.12.*CVE List
  • Linuxunaffected: 6.18.53 through 6.18.*CVE List
  • Linuxunaffected: 7.2.7 through 7.2.*CVE List
  • Linuxunaffected: 7.3CVE List

References 8