{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-43226", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-01T14:12:55.994Z", "datePublished": "2026-05-06T11:28:24.952Z", "dateUpdated": "2026-08-05T12:26:42.896Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:26:42.896Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/rds: No shortcut out of RDS_CONN_ERROR\n\nRDS connections carry a state \"rds_conn_path::cp_state\"\nand transitions from one state to another and are conditional\nupon an expected state: \"rds_conn_path_transition.\"\n\nThere is one exception to this conditionality, which is\n\"RDS_CONN_ERROR\" that can be enforced by \"rds_conn_path_drop\"\nregardless of what state the condition is currently in.\n\nBut as soon as a connection enters state \"RDS_CONN_ERROR\",\nthe connection handling code expects it to go through the\nshutdown-path.\n\nThe RDS/TCP multipath changes added a shortcut out of\n\"RDS_CONN_ERROR\" straight back to \"RDS_CONN_CONNECTING\"\nvia \"rds_tcp_accept_one_path\" (e.g. after \"rds_tcp_state_change\").\n\nA subsequent \"rds_tcp_reset_callbacks\" can then transition\nthe state to \"RDS_CONN_RESETTING\" with a shutdown-worker queued.\n\nThat'll trip up \"rds_conn_init_shutdown\", which was\nnever adjusted to handle \"RDS_CONN_RESETTING\" and subsequently\ndrops the connection with the dreaded \"DR_INV_CONN_STATE\",\nwhich leaves \"RDS_SHUTDOWN_WORK_QUEUED\" on forever.\n\nSo we do two things here:\n\na) Don't shortcut \"RDS_CONN_ERROR\", but take the longer\n path through the shutdown code.\n\nb) Add \"RDS_CONN_RESETTING\" to the expected states in\n \"rds_conn_init_shutdown\" so that we won't error out\n and get stuck, if we ever hit weird state transitions\n like this again.\"" } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:N - The vulnerable code is in the RDS/TCP passive accept path reached by remote TCP connections to the kernel RDS listener on port 16385. No local syscall or physical access is required in a deployment where RDS/TCP is enabled and reachable.\nAC:L - The attacker can drive the relevant error and reconnect sequence by opening, closing, and reconnecting TCP connections; the queued-shutdown timing is repeatable and under attacker influence. There is no requirement for a rare victim-controlled state beyond an active RDS/TCP deployment.\nPR:N - The accept path runs before any RDS authentication or credential check, and RDS/TCP does not authenticate the remote peer before reaching rds_tcp_accept_one_path. A network attacker only needs the ability to connect to the listener.\nUI:N - Exploitation does not require a user to open a file, mount anything, or perform an action. The attacker triggers it through network connection sequencing.\nS:U - The impact remains within the kernel/RDS networking security authority. It does not cross a VM, IOMMU, or other separate security boundary.\nC:N - The bug is a connection state-machine error and I found no memory disclosure path, out-of-bounds read, or use-after-free primitive. It does not expose kernel or application data.\nI:N - The fix addresses invalid RDS connection state transitions, not memory corruption or unauthorized data modification. I found no arbitrary write, control-flow hijack, or integrity-impacting primitive.\nA:H - The invalid shortcut can leave an RDS/TCP connection path stuck with shutdown/reconnect work state permanently wedged, denying RDS availability for affected peer paths until external recovery. Because it is remotely and repeatedly triggerable against a network service, the 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/connection.c", "net/rds/tcp_listen.c" ], "versions": [ { "version": "5916e2c1554f3e36f770401c989c3c7fadf619ca", "lessThan": "9bcd7c00691a2db9745817d5ea79262a503b135c", "status": "affected", "versionType": "git" }, { "version": "5916e2c1554f3e36f770401c989c3c7fadf619ca", "lessThan": "a179ac7be8f5a650d0068040705f4cddd6ca369c", "status": "affected", "versionType": "git" }, { "version": "5916e2c1554f3e36f770401c989c3c7fadf619ca", "lessThan": "19e384a7d00d888303a8285977cdf1970c6cccd6", "status": "affected", "versionType": "git" }, { "version": "5916e2c1554f3e36f770401c989c3c7fadf619ca", "lessThan": "f0f729bdffb08af32e0f54521b81b8a9e0321f16", "status": "affected", "versionType": "git" }, { "version": "5916e2c1554f3e36f770401c989c3c7fadf619ca", "lessThan": "81248b1eb3c5954cc1fc7b33b7c03e34d20cb8c8", "status": "affected", "versionType": "git" }, { "version": "5916e2c1554f3e36f770401c989c3c7fadf619ca", "lessThan": "899ef00963ce76f9fc421a7d02335fe4ead6389b", "status": "affected", "versionType": "git" }, { "version": "5916e2c1554f3e36f770401c989c3c7fadf619ca", "lessThan": "9ff599a9be784a808c36765086e3db2144aa3b66", "status": "affected", "versionType": "git" }, { "version": "5916e2c1554f3e36f770401c989c3c7fadf619ca", "lessThan": "ad22d24be635c6beab6a1fdd3f8b1f3c478d15da", "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/connection.c", "net/rds/tcp_listen.c" ], "versions": [ { "version": "4.8", "status": "affected" }, { "version": "0", "lessThan": "4.8", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.252", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.202", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.165", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.128", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.75", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.16", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.19.6", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.0", "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": "4.8", "versionEndExcluding": "5.10.252" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "5.15.202" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "6.1.165" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "6.6.128" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "6.12.75" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "6.18.16" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "6.19.6" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "7.0" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/9bcd7c00691a2db9745817d5ea79262a503b135c" }, { "url": "https://git.kernel.org/stable/c/a179ac7be8f5a650d0068040705f4cddd6ca369c" }, { "url": "https://git.kernel.org/stable/c/19e384a7d00d888303a8285977cdf1970c6cccd6" }, { "url": "https://git.kernel.org/stable/c/f0f729bdffb08af32e0f54521b81b8a9e0321f16" }, { "url": "https://git.kernel.org/stable/c/81248b1eb3c5954cc1fc7b33b7c03e34d20cb8c8" }, { "url": "https://git.kernel.org/stable/c/899ef00963ce76f9fc421a7d02335fe4ead6389b" }, { "url": "https://git.kernel.org/stable/c/9ff599a9be784a808c36765086e3db2144aa3b66" }, { "url": "https://git.kernel.org/stable/c/ad22d24be635c6beab6a1fdd3f8b1f3c478d15da" } ], "title": "net/rds: No shortcut out of RDS_CONN_ERROR", "x_generator": { "engine": "bippy-1.2.0" } } } }