CVE-2026-46053

net: rds: fix MR cleanup on copy error

HIGH

7.8

CVSS Score

Published: May 27, 2026 at 12:57 PM UTC

Updated: August 5, 2026 at 01:24 PM UTC

1 product affected across 1 vendorLinux Kernel

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Severity

HIGH7.8

Exploit prediction

EPSS 0.1%

Description

In the Linux kernel, the following vulnerability has been resolved: net: rds: fix MR cleanup on copy error __rds_rdma_map() hands sg/pages ownership to the transport after get_mr() succeeds. If copying the generated cookie back to user space fails after that point, the error path must not free those resources again before dropping the MR reference. Remove the duplicate unpin/free from the put_user() failure branch so that MR teardown is handled only through the existing final cleanup path.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel · Linux

95%

5.11 ≤ v < 5.15.2095.16 ≤ v < 6.1.1755.6 ≤ v < 5.10.2585.6 ≤ v < 5.15.2095.6 ≤ v < 6.1.1755.6 ≤ v < 6.12.865.6 ≤ v < 6.18.275.6 ≤ v < 6.6.1405.6 ≤ v < 7.0.45.6 ≤ v < 7.15.6.1 ≤ v < 5.10.2586.13 ≤ v < 6.18.276.19 ≤ v < 7.0.46.2 ≤ v < 6.6.1406.7 ≤ v < 6.12.860d4597c8c5abdeeaf50774066c16683f30184dc85.6 5.6 rc3 5.6 rc4 5.6 rc5 5.6 rc6 5.6 rc7

Vendor states this is fixed in 033370ffb3c9c0264d19f8ba9ef769523266589a (fixed)

Vendor states this is fixed in 106dc689206610cfa2098f593fdd1e020c997835 (fixed)

Vendor states this is fixed in 8141a2dc70080eda1aedc0389ed2db2b292af5bd (fixed)

Vendor states this is fixed in 8fdbb6262a4a3ed44a0830a7793903b54bb27bdc (fixed)

Vendor states this is fixed in 91a44b406bc1f9e1c5da0cb7d0d5991b43b79147 (fixed)

Vendor states this is fixed in b3cb8cae530b2727d8245684148bb49425f6765c (fixed)

Vendor states this is fixed in d95cea9298be1ba8876e3f156be96d3a492085ca (fixed)

Vendor states this is fixed in ec55a86f7fba7d9111df94b9c11a4755ed492995 (fixed)

Vendor states this is fixed in 5.10.258 (unaffected)

Vendor states this is fixed in 5.15.209 (unaffected)

Vendor states this is fixed in 5.6 (unaffected)

Vendor states this is fixed in 6.1.175 (unaffected)