{ "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:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.6", "versionEndExcluding": "5.15.209" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.6", "versionEndExcluding": "6.1.175" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.6", "versionEndExcluding": "6.6.140" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.6", "versionEndExcluding": "6.12.86" }, { "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" } } } }