CVE-2026-46053 (CVSS 7.8)

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.

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CVSS v3.1 Score

7.8

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS — Exploit Prediction

0.0013

Probability of exploitation

0.03%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

References

Other References

https://git.kernel.org/stable/c/033370ffb3c9c0264d19f8ba9ef769523266589a https://git.kernel.org/stable/c/106dc689206610cfa2098f593fdd1e020c997835 https://git.kernel.org/stable/c/8141a2dc70080eda1aedc0389ed2db2b292af5bd https://git.kernel.org/stable/c/8fdbb6262a4a3ed44a0830a7793903b54bb27bdc https://git.kernel.org/stable/c/91a44b406bc1f9e1c5da0cb7d0d5991b43b79147 https://git.kernel.org/stable/c/b3cb8cae530b2727d8245684148bb49425f6765c https://git.kernel.org/stable/c/d95cea9298be1ba8876e3f156be96d3a492085ca https://git.kernel.org/stable/c/ec55a86f7fba7d9111df94b9c11a4755ed492995

Frequently Asked Questions

What is CVE-2026-46053? +

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. It has a CVSS v3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-46053? +

CVE-2026-46053 has a CVSS v3.1 score of 7.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0013, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-46053? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

CVE-2026-46053