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vuln-cve/data/2026/46xxx/CVE-2026-46053.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-46053",
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"state": "PUBLISHED",
"assignerShortName": "Linux",
"dateReserved": "2026-05-13T15:03:33.094Z",
"datePublished": "2026-05-27T12:57:11.870Z",
"dateUpdated": "2026-08-05T12:29:21.209Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux",
"dateUpdated": "2026-08-05T12:29:21.209Z"
},
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: rds: fix MR cleanup on copy error\n\n__rds_rdma_map() hands sg/pages ownership to the transport after\nget_mr() succeeds. If copying the generated cookie back to user space\nfails after that point, the error path must not free those resources\nagain before dropping the MR reference.\n\nRemove the duplicate unpin/free from the put_user() failure branch so\nthat MR teardown is handled only through the existing final cleanup\npath."
}
],
"metrics": [
{
"cvssV3_1": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"baseScore": 7.8,
"baseSeverity": "HIGH"
},
"scenarios": [
{
"lang": "en",
"value": "AV:L - The bug is triggered through the local `setsockopt(SOL_RDS, RDS_GET_MR/RDS_GET_MR_FOR_DEST)` syscall on an RDS socket (MR-registration control plane); it is not reachable from a remote peer's network packets.\nAC:L - Once an RDMA-capable RDS socket is bound, the double-free is 100% deterministic and the attacker fully controls the trigger by supplying a bad `cookie_addr` so `put_user()` faults; there is no race or attacker-uncontrolled condition.\nPR:L - Creating an AF_RDS socket has no capability check (module auto-loads) and `can_do_mlock()` passes for normal users by default, so any unprivileged local user on a host with RDMA hardware can reach the path.\nUI:N - The attacker triggers the entire sequence with its own syscalls; no action by another user or victim is required.\nS:U - The double-free corrupts the kernel slab/page allocator within the kernel's own security authority and does not cross a virtualization or IOMMU boundary.\nC:H - The double-free of the `sg` slab object and the page-refcount underflow yield use-after-free/cross-object primitives that can be groomed into arbitrary kernel-memory reads, enabling significant information disclosure.\nI:H - A double `kfree()` corrupts the SLUB freelist and the page-refcount underflow allows reuse of an in-use physical page, both classic primitives for arbitrary kernel write and privilege escalation.\nA:H - The double-free and page-refcount underflow readily cause heap corruption, freelist poisoning, and kernel panic/oops."
}
]
}
],
"affected": [
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"net/rds/rdma.c"
],
"versions": [
{
"version": "0d4597c8c5abdeeaf50774066c16683f30184dc8",
"lessThan": "91a44b406bc1f9e1c5da0cb7d0d5991b43b79147",
"status": "affected",
"versionType": "git"
},
{
"version": "0d4597c8c5abdeeaf50774066c16683f30184dc8",
"lessThan": "106dc689206610cfa2098f593fdd1e020c997835",
"status": "affected",
"versionType": "git"
},
{
"version": "0d4597c8c5abdeeaf50774066c16683f30184dc8",
"lessThan": "ec55a86f7fba7d9111df94b9c11a4755ed492995",
"status": "affected",
"versionType": "git"
},
{
"version": "0d4597c8c5abdeeaf50774066c16683f30184dc8",
"lessThan": "8fdbb6262a4a3ed44a0830a7793903b54bb27bdc",
"status": "affected",
"versionType": "git"
},
{
"version": "0d4597c8c5abdeeaf50774066c16683f30184dc8",
"lessThan": "d95cea9298be1ba8876e3f156be96d3a492085ca",
"status": "affected",
"versionType": "git"
},
{
"version": "0d4597c8c5abdeeaf50774066c16683f30184dc8",
"lessThan": "033370ffb3c9c0264d19f8ba9ef769523266589a",
"status": "affected",
"versionType": "git"
},
{
"version": "0d4597c8c5abdeeaf50774066c16683f30184dc8",
"lessThan": "b3cb8cae530b2727d8245684148bb49425f6765c",
"status": "affected",
"versionType": "git"
},
{
"version": "0d4597c8c5abdeeaf50774066c16683f30184dc8",
"lessThan": "8141a2dc70080eda1aedc0389ed2db2b292af5bd",
"status": "affected",
"versionType": "git"
}
]
},
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "affected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"net/rds/rdma.c"
],
"versions": [
{
"version": "5.6",
"status": "affected"
},
{
"version": "0",
"lessThan": "5.6",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.10.258",
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.15.209",
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.1.175",
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.6.140",
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.12.86",
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.18.27",
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "7.0.4",
"lessThanOrEqual": "7.0.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "7.1",
"lessThanOrEqual": "*",
"status": "unaffected",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"operator": "OR",
"negate": false,
"cpeMatch": [
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.6",
"versionEndExcluding": "5.10.258"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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},
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},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.6",
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},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.6",
"versionEndExcluding": "6.18.27"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.6",
"versionEndExcluding": "7.0.4"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.6",
"versionEndExcluding": "7.1"
}
]
}
]
}
],
"references": [
{
"url": "https://git.kernel.org/stable/c/91a44b406bc1f9e1c5da0cb7d0d5991b43b79147"
},
{
"url": "https://git.kernel.org/stable/c/106dc689206610cfa2098f593fdd1e020c997835"
},
{
"url": "https://git.kernel.org/stable/c/ec55a86f7fba7d9111df94b9c11a4755ed492995"
},
{
"url": "https://git.kernel.org/stable/c/8fdbb6262a4a3ed44a0830a7793903b54bb27bdc"
},
{
"url": "https://git.kernel.org/stable/c/d95cea9298be1ba8876e3f156be96d3a492085ca"
},
{
"url": "https://git.kernel.org/stable/c/033370ffb3c9c0264d19f8ba9ef769523266589a"
},
{
"url": "https://git.kernel.org/stable/c/b3cb8cae530b2727d8245684148bb49425f6765c"
},
{
"url": "https://git.kernel.org/stable/c/8141a2dc70080eda1aedc0389ed2db2b292af5bd"
}
],
"title": "net: rds: fix MR cleanup on copy error",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
}
}
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