{"id":"CVE-2026-98070","revision":"c5569c68356042ce9145d8737cc95e62","records":[{"revision":"c5569c68356042ce9145d8737cc95e62","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-98070","aliases":[],"title":"net/rds: acquire RDS_IN_XMIT in rds_tcp_reset_callbacks()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/rds: acquire RDS_IN_XMIT in rds_tcp_reset_callbacks()\n\nrds_tcp_reset_callbacks() quiesces the transmit path by setting the\npath state to RDS_CONN_RESETTING and then waiting for RDS_IN_XMIT to\nbe sampled clear before swapping the underlying socket and calling\nrds_send_path_reset().\n\nSampling the bit clear is not the same as owning it: rds_send_xmit()\ncan re-acquire RDS_IN_XMIT right after the wait_event() returns.  Its\nstate recheck after taking the lock is a store-buffering pattern (the\nresetter writes the state and reads the bit, the sender writes the\nbit and reads the state) and acquire_in_xmit() is only an acquire\noperation, so on weakly ordered architectures both sides can miss\neach other's write and the transmit path then runs concurrently with\nrds_send_path_reset() rewriting cp_xmit_* state - which is exactly\nwhat the comment above rds_send_path_reset() tells its callers to\nprevent.\n\nTake the lock instead, hold it across the socket swap and\nrds_send_path_reset(), and release it with a wake-up at the end.  The\nlock-ordering constraint documented above the wait still holds: the\nlock is acquired before lock_sock(), so a sender inside tcp_sendmsg()\ncan never be waited on while we hold the socket lock.\n\nTwo details of the old code go away with the same change:\n\n - t_sock is now read only after the lock is acquired.  The old code\n   cached it before waiting; the teardown in rds_conn_shutdown()\n   releases that socket and clears t_sock, so a pointer cached before\n   the wait can be stale by the time the accept path resumes.  Reading\n   it under RDS_IN_XMIT is what makes the exclusion complete once the\n   teardown owns the same lock, which the next patch arranges; until\n   then the teardown still only samples the bit, and the two paths\n   remain as exposed to each other as they are today.\n\n - The old !osock early path called rds_send_path_reset() with no\n   serialization at all.  It now runs under the lock like the normal\n   path.  The conditional RDS_CONN_RESETTING transition of the\n   previous patch happens before the socket check either way: a path\n   found without a socket is either still connecting (its reconnect\n   worker blocked on t_conn_path_lock) and legitimately goes\n   RESETTING -> UP on the new socket, or it has been torn down\n   meanwhile and is dropped.\n\nThe in-function comment describing the old wait-based quiesce is\nrewritten to describe the lock-based one, and the stale block comment\nabove the function (which still described a return value and an\nincomplete list of t_sock writers) is refreshed to name all four\nwriters - the connect, accept, teardown and swap paths - and what\nserializes each of them.","state":0,"publishedAt":"2026-09-25T10:24:11.481+00:00","modifiedAt":"2026-10-19T09:13:19.953+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/rds/tcp.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"335b48d980f631fbc5b233cbb3625ac0c86d67cb\",\n                            \"lessThan\": \"670af4e4a4de5e6bb5daee3838485571a0caa5fa\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"335b48d980f631fbc5b233cbb3625ac0c86d67cb\",\n                            \"lessThan\": \"830a2e21b200c6b6fdccc63dd3f23932bf7a894b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"335b48d980f631fbc5b233cbb3625ac0c86d67cb\",\n                            \"lessThan\": \"a05790cb4ff03f797d76906990b148d83f63e7a3\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"335b48d980f631fbc5b233cbb3625ac0c86d67cb\",\n                            \"lessThan\": \"d184e6dd4b8f3c20c018595fd09795a66b46c8ef\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"335b48d980f631fbc5b233cbb3625ac0c86d67cb\",\n                            \"lessThan\": \"d625112564c3e980e02504270222b49b82690cee\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"335b48d980f631fbc5b233cbb3625ac0c86d67cb\",\n                            \"lessThan\": \"8e4c3b7844c906c7097b4cfedd9dd1f48c9a6a92\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"335b48d980f631fbc5b233cbb3625ac0c86d67cb\",\n                            \"lessThan\": \"062d9e008c67289e8e1b221ecdd8f9d60566d012\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"335b48d980f631fbc5b233cbb3625ac0c86d67cb\",\n                            \"lessThan\": \"02c5f9dc2efd823e061954d564ce00bacd1bebeb\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/rds/tcp.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"4.7\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"4.7\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.271\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.222\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.189\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.158\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.111\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.53\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.7\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","score":8.1,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/670af4e4a4de5e6bb5daee3838485571a0caa5fa","https://git.kernel.org/stable/c/830a2e21b200c6b6fdccc63dd3f23932bf7a894b","https://git.kernel.org/stable/c/a05790cb4ff03f797d76906990b148d83f63e7a3","https://git.kernel.org/stable/c/d184e6dd4b8f3c20c018595fd09795a66b46c8ef","https://git.kernel.org/stable/c/d625112564c3e980e02504270222b49b82690cee","https://git.kernel.org/stable/c/8e4c3b7844c906c7097b4cfedd9dd1f48c9a6a92","https://git.kernel.org/stable/c/062d9e008c67289e8e1b221ecdd8f9d60566d012","https://git.kernel.org/stable/c/02c5f9dc2efd823e061954d564ce00bacd1bebeb"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98070","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-98070","identifiers":["CVE-2026-98070"]},"retained":false,"historicalAffected":[]}],"coverage":[]}