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CVE-2026-46053— net: rds: fix MR cleanup on copy error

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于rds中MR清理错误，可能导致copy_to_user失败后重复释放资源。

CVSS 7.8 · High EPSS 0.13% · P3

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 0d4597c8c5abdeeaf50774066c16683f30184dc8< 91a44b406bc1f9e1c5da0cb7d0d5991b43b79147 affected
0d4597c8c5abdeeaf50774066c16683f30184dc8< 106dc689206610cfa2098f593fdd1e020c997835 affected
0d4597c8c5abdeeaf50774066c16683f30184dc8< ec55a86f7fba7d9111df94b9c11a4755ed492995 affected
0d4597c8c5abdeeaf50774066c16683f30184dc8< 8fdbb6262a4a3ed44a0830a7793903b54bb27bdc affected
0d4597c8c5abdeeaf50774066c16683f30184dc8< d95cea9298be1ba8876e3f156be96d3a492085ca affected
0d4597c8c5abdeeaf50774066c16683f30184dc8< 033370ffb3c9c0264d19f8ba9ef769523266589a affected
0d4597c8c5abdeeaf50774066c16683f30184dc8< b3cb8cae530b2727d8245684148bb49425f6765c affected
0d4597c8c5abdeeaf50774066c16683f30184dc8< 8141a2dc70080eda1aedc0389ed2db2b292af5bd affected
… +10 more rows
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I. Basic Information for CVE-2026-46053

Vulnerability Information
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Vulnerability Title
net: rds: fix MR cleanup on copy error
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于rds中MR清理错误，可能导致copy_to_user失败后重复释放资源。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 0d4597c8c5abdeeaf50774066c16683f30184dc8 ~ 91a44b406bc1f9e1c5da0cb7d0d5991b43b79147 -
Linux Linux 5.6 -

II. Public POCs for CVE-2026-46053

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III. Intelligence Information for CVE-2026-46053

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Patches & Fixes for CVE-2026-46053 (8)

Same Patch Batch · Linux · 2026-05-27 · 275 CVEs total

CVE-2026-45898 9.8 CRITICAL RDMA/iwcm: Fix workqueue list corruption by removing work_list
CVE-2026-46039 9.8 CRITICAL rxgk: Fix potential integer overflow in length check
CVE-2026-45988 9.8 CRITICAL rxrpc: Fix re-decryption of RESPONSE packets
CVE-2026-45972 9.8 CRITICAL smb: client: fix potential UAF and double free in smb2_open_file()
CVE-2026-46043 9.1 CRITICAL RDMA/rxe: Validate pad and ICRC before payload_size() in rxe_rcv
CVE-2026-45945 8.8 HIGH iommu/vt-d: Fix race condition during PASID entry replacement
CVE-2026-46056 8.8 HIGH Bluetooth: hci_event: fix potential UAF in SSP passkey handlers
CVE-2026-45843 8.2 HIGH slip: bound decode() reads against the compressed packet length
CVE-2026-46037 8.2 HIGH ipv4: icmp: validate reply type before using icmp_pointers
CVE-2025-71311 8.2 HIGH fs/ntfs3: Initialize new folios before use
CVE-2026-46010 8.1 HIGH rxrpc: Fix error handling in rxgk_extract_token()
CVE-2026-46099 8.1 HIGH net: ipv6: fix NOREF dst use in seg6 and rpl lwtunnels
CVE-2026-46076 7.9 HIGH KVM: nSVM: Raise #UD if unhandled VMMCALL isn't intercepted by L1
CVE-2026-45909 7.8 HIGH clk: mediatek: Drop __initconst from gates
CVE-2026-45951 7.8 HIGH bpf: Fix a potential use-after-free of BTF object
CVE-2026-45878 7.8 HIGH drm/amdkfd: Fix watch_id bounds checking in debug address watch v2
CVE-2026-46036 7.8 HIGH vfio/cdx: Serialize VFIO_DEVICE_SET_IRQS with a per-device mutex
CVE-2026-46065 7.8 HIGH fbdev: defio: Disconnect deferred I/O from the lifetime of struct fb_info
CVE-2026-46015 7.8 HIGH tcp: call sk_data_ready() after listener migration
CVE-2026-45910 7.8 HIGH RDMA/rxe: Fix race condition in QP timer handlers

Showing top 20 of 275 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-46053

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