net: rds: fix MR cleanup on copy error
Priority LOW 33Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA.
Summary
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.
Why it matters now
EPSS 0.00129 2nd percentileScored 2026-11-07
Fix Fixed Linux (Linux): 5.10.258, 5.15.209, 6.1.175 +5
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 5.6 and later | 5.10.258, 5.15.209, 6.1.175, 6.6.140, 6.12.86, 6.18.27, 7.0.4, 7.1 | Patch available | CNA |
- Linux VendorLinux Affected 5.6 and later Fixed in 5.10.258, 5.15.209, 6.1.175, 6.6.140, 6.12.86, 6.18.27, 7.0.4, 7.1 Patch available CNA
CPE configurations NVD · 7
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 5.6.1 to before 5.10.258; 5.11 to before 5.15.209; 5.16 to before 6.1.175; 6.2 to before 6.6.140; 6.7 to before 6.12.86; 6.13 to before 6.18.27; 6.19 to before 7.0.4 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:5.6:-:*:*:*:*:*:* | 5.6 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:5.6:rc3:*:*:*:*:*:* | 5.6 rc3 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:5.6:rc4:*:*:*:*:*:* | 5.6 rc4 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:5.6:rc5:*:*:*:*:*:* | 5.6 rc5 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:5.6:rc6:*:*:*:*:*:* | 5.6 rc6 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:5.6:rc7:*:*:*:*:*:* | 5.6 rc7 | Vulnerable | Linux |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 5.6.1 to before 5.10.258; 5.11 to before 5.15.209; 5.16 to before 6.1.175; 6.2 to before 6.6.140; 6.7 to before 6.12.86; 6.13 to before 6.18.27; 6.19 to before 7.0.4 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:5.6:-:*:*:*:*:*:* Versions 5.6 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:5.6:rc3:*:*:*:*:*:* Versions 5.6 rc3 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:5.6:rc4:*:*:*:*:*:* Versions 5.6 rc4 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:5.6:rc5:*:*:*:*:*:* Versions 5.6 rc5 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:5.6:rc6:*:*:*:*:*:* Versions 5.6 rc6 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:5.6:rc7:*:*:*:*:*:* Versions 5.6 rc7 Vulnerable ·Linux
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.10.258, 5.15.209, 6.1.175, 6.6.140, 6.12.86, 6.18.27, 7.0.4, 7.1
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
Not affected: 5 products
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
Timeline
- 2026-10-02 Threatist record created from CVE-2026-46053
- 2026-10-03 Alias added: GHSA-p6f8-fpcw-hg3g
References
Patch 8
- https://git.kernel.org/stable/c/91a44b406bc1f9e1c5da0cb7d0d5991b43b79147
- https://git.kernel.org/stable/c/106dc689206610cfa2098f593fdd1e020c997835
- https://git.kernel.org/stable/c/ec55a86f7fba7d9111df94b9c11a4755ed492995
- https://git.kernel.org/stable/c/8fdbb6262a4a3ed44a0830a7793903b54bb27bdc
- https://git.kernel.org/stable/c/d95cea9298be1ba8876e3f156be96d3a492085ca
- https://git.kernel.org/stable/c/033370ffb3c9c0264d19f8ba9ef769523266589a
- https://git.kernel.org/stable/c/b3cb8cae530b2727d8245684148bb49425f6765c
- https://git.kernel.org/stable/c/8141a2dc70080eda1aedc0389ed2db2b292af5bd
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Sources
- CVE-2026-46053 · CVE Program
- CVE-2026-46053 · NVD
- FIRST EPSS
- GHSA-p6f8-fpcw-hg3g · GitHub Advisory Database · CC BY 4.0
- CVE-2026-46053 · Red Hat security data · CC BY 4.0
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