CVE-2026-46053

net: rds: fix MR cleanup on copy error

State: Published
Severity: 7.8 High
Published: May 27, 2026
Updated: Aug 5, 2026
Reserved: May 13, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	0d4597c8c5abdeeaf50774066c16683f30184dc8 to before 91a44b406bc1f9e1c5da0cb7d0d5991b43b79147Affected 0d4597c8c5abdeeaf50774066c16683f30184dc8 to before 106dc689206610cfa2098f593fdd1e020c997835Affected 0d4597c8c5abdeeaf50774066c16683f30184dc8 to before ec55a86f7fba7d9111df94b9c11a4755ed492995Affected 0d4597c8c5abdeeaf50774066c16683f30184dc8 to before 8fdbb6262a4a3ed44a0830a7793903b54bb27bdcAffected 0d4597c8c5abdeeaf50774066c16683f30184dc8 to before d95cea9298be1ba8876e3f156be96d3a492085caAffected 0d4597c8c5abdeeaf50774066c16683f30184dc8 to before 033370ffb3c9c0264d19f8ba9ef769523266589aAffected 0d4597c8c5abdeeaf50774066c16683f30184dc8 to before b3cb8cae530b2727d8245684148bb49425f6765cAffected 0d4597c8c5abdeeaf50774066c16683f30184dc8 to before 8141a2dc70080eda1aedc0389ed2db2b292af5bdAffected
LinuxLinux	5.6Affected before 5.6Not affected 5.10.258 through 5.10.Not affected 5.15.209 through 5.15.Not affected 6.1.175 through 6.1.Not affected 6.6.140 through 6.6.Not affected 6.12.86 through 6.12.Not affected 6.18.27 through 6.18.Not affected 7.0.4 through 7.0.*Not affected 7.1 and laterNot affected

Product

Versions

LinuxLinux

0d4597c8c5abdeeaf50774066c16683f30184dc8 to before 91a44b406bc1f9e1c5da0cb7d0d5991b43b79147Affected
0d4597c8c5abdeeaf50774066c16683f30184dc8 to before 106dc689206610cfa2098f593fdd1e020c997835Affected
0d4597c8c5abdeeaf50774066c16683f30184dc8 to before ec55a86f7fba7d9111df94b9c11a4755ed492995Affected
0d4597c8c5abdeeaf50774066c16683f30184dc8 to before 8fdbb6262a4a3ed44a0830a7793903b54bb27bdcAffected
0d4597c8c5abdeeaf50774066c16683f30184dc8 to before d95cea9298be1ba8876e3f156be96d3a492085caAffected
0d4597c8c5abdeeaf50774066c16683f30184dc8 to before 033370ffb3c9c0264d19f8ba9ef769523266589aAffected
0d4597c8c5abdeeaf50774066c16683f30184dc8 to before b3cb8cae530b2727d8245684148bb49425f6765cAffected
0d4597c8c5abdeeaf50774066c16683f30184dc8 to before 8141a2dc70080eda1aedc0389ed2db2b292af5bdAffected

LinuxLinux

5.6Affected
before 5.6Not affected
5.10.258 through 5.10.*Not affected
5.15.209 through 5.15.*Not affected
6.1.175 through 6.1.*Not affected
6.6.140 through 6.6.*Not affected
6.12.86 through 6.12.*Not affected
6.18.27 through 6.18.*Not affected
7.0.4 through 7.0.*Not affected
7.1 and laterNot affected

References

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