{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-53077", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-06-09T07:44:35.383Z", "datePublished": "2026-06-24T16:30:17.972Z", "dateUpdated": "2026-08-05T12:33:10.122Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:33:10.122Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/rds: Restrict use of RDS/IB to the initial network namespace\n\nPrevent using RDS/IB in network namespaces other than the initial one.\nThe existing RDS/IB code will not work properly in non-initial network\nnamespaces." } ], "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 - Reachability is through local syscalls: unshare a user/network namespace, create an AF_RDS socket, select RDS/IB with setsockopt, then bind/send and tear down the namespace. A remote peer alone cannot create the stale non-init namespace RDS/IB connection.\nAC:L - The attacker controls the namespace lifetime and socket operations needed to leave an RDS/IB connection with a stale net pointer, and syzbot reproduced the UAF. No hard-to-win race or victim state outside attacker control is required.\nPR:L - AF_RDS socket creation and SO_RDS_TRANSPORT do not require real init-namespace root, and the issue is reachable by an unprivileged local user via user namespaces. This is not an unauthenticated remote path, so low local privileges are required.\nUI:N - No victim action is needed after the attacker runs the local namespace and socket sequence. The later RDMA/RDS workqueue access occurs asynchronously in kernel context.\nS:U - The vulnerability corrupts/accesses kernel resources within the same kernel security authority. It is not a VM escape, IOMMU bypass, or other cross-authority boundary break.\nC:H - The bug is a slab use-after-free read of a freed net_namespace from RDS/IB asynchronous connection handling. Under the required kernel scoring guidance, UAFs are scored as high confidentiality impact because freed object reuse can expose kernel memory.\nI:H - Although the observed report is a UAF read, use-after-free bugs can generally be shaped through heap reuse into stronger memory corruption primitives. Per the required guidance and uncertainty rule, this warrants high integrity impact.\nA:H - Syzbot reports a KASAN slab-use-after-free in rds_conn_path_drop, and the same stale pointer access can trigger kernel oops/panic or destabilize RDS/RDMA workqueues. Kernel crash availability impact is high." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/rds/af_rds.c", "net/rds/ib.c" ], "versions": [ { "version": "d5a8ac28a7ff2f250d1bedbb6008dd2f6f6f1638", "lessThan": "3e7f14cd5a51533404e1ae4809caab46073fb5c7", "status": "affected", "versionType": "git" }, { "version": "d5a8ac28a7ff2f250d1bedbb6008dd2f6f6f1638", "lessThan": "3174fc703d081d2ca538b22fba734e3ad5b52322", "status": "affected", "versionType": "git" }, { "version": "d5a8ac28a7ff2f250d1bedbb6008dd2f6f6f1638", "lessThan": "c244b79adffad89a5173cf8bfaa06a6b40bbd09b", "status": "affected", "versionType": "git" }, { "version": "d5a8ac28a7ff2f250d1bedbb6008dd2f6f6f1638", "lessThan": "07035306bf722f4676a1aee35cbeb3732c76194e", "status": "affected", "versionType": "git" }, { "version": "d5a8ac28a7ff2f250d1bedbb6008dd2f6f6f1638", "lessThan": "fb407343c0c16e94584707b2dfdd350a5f81b000", "status": "affected", "versionType": "git" }, { "version": "d5a8ac28a7ff2f250d1bedbb6008dd2f6f6f1638", "lessThan": "a7494479757d60d2413bfaa087f8431a26eea032", "status": "affected", "versionType": "git" }, { "version": "d5a8ac28a7ff2f250d1bedbb6008dd2f6f6f1638", "lessThan": "b6a54f5e9ce9b97ae641855378d71c5154a085c0", "status": "affected", "versionType": "git" }, { "version": "d5a8ac28a7ff2f250d1bedbb6008dd2f6f6f1638", "lessThan": "ebf71dd4aff46e8e421d455db3e231ba43d2fa8a", "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/af_rds.c", "net/rds/ib.c" ], "versions": [ { "version": "4.3", "status": "affected" }, { "version": "0", "lessThan": "4.3", "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": "6.6.141", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.91", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.33", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.0.10", "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": "4.3", "versionEndExcluding": "5.10.258" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "5.15.209" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "6.1.175" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "6.6.141" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "6.12.91" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "6.18.33" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "7.0.10" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "7.1" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/3e7f14cd5a51533404e1ae4809caab46073fb5c7" }, { "url": "https://git.kernel.org/stable/c/3174fc703d081d2ca538b22fba734e3ad5b52322" }, { "url": "https://git.kernel.org/stable/c/c244b79adffad89a5173cf8bfaa06a6b40bbd09b" }, { "url": "https://git.kernel.org/stable/c/07035306bf722f4676a1aee35cbeb3732c76194e" }, { "url": "https://git.kernel.org/stable/c/fb407343c0c16e94584707b2dfdd350a5f81b000" }, { "url": "https://git.kernel.org/stable/c/a7494479757d60d2413bfaa087f8431a26eea032" }, { "url": "https://git.kernel.org/stable/c/b6a54f5e9ce9b97ae641855378d71c5154a085c0" }, { "url": "https://git.kernel.org/stable/c/ebf71dd4aff46e8e421d455db3e231ba43d2fa8a" } ], "title": "net/rds: Restrict use of RDS/IB to the initial network namespace", "x_generator": { "engine": "bippy-1.2.0" } } } }