266 lines
15 KiB
JSON
266 lines
15 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-43226",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-05-01T14:12:55.994Z",
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"datePublished": "2026-05-06T11:28:24.952Z",
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"dateUpdated": "2026-08-05T12:26:42.896Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T12:26:42.896Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"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.\""
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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"baseScore": 7.5,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"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."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"net/rds/connection.c",
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"net/rds/tcp_listen.c"
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],
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"versions": [
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{
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"version": "5916e2c1554f3e36f770401c989c3c7fadf619ca",
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"lessThan": "9bcd7c00691a2db9745817d5ea79262a503b135c",
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"status": "affected",
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},
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{
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"lessThan": "a179ac7be8f5a650d0068040705f4cddd6ca369c",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "5916e2c1554f3e36f770401c989c3c7fadf619ca",
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"lessThan": "19e384a7d00d888303a8285977cdf1970c6cccd6",
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"status": "affected",
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"lessThan": "f0f729bdffb08af32e0f54521b81b8a9e0321f16",
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"status": "affected",
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},
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{
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"version": "5916e2c1554f3e36f770401c989c3c7fadf619ca",
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"lessThan": "81248b1eb3c5954cc1fc7b33b7c03e34d20cb8c8",
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"status": "affected",
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},
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{
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"version": "5916e2c1554f3e36f770401c989c3c7fadf619ca",
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"lessThan": "899ef00963ce76f9fc421a7d02335fe4ead6389b",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "5916e2c1554f3e36f770401c989c3c7fadf619ca",
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"lessThan": "9ff599a9be784a808c36765086e3db2144aa3b66",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "5916e2c1554f3e36f770401c989c3c7fadf619ca",
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"lessThan": "ad22d24be635c6beab6a1fdd3f8b1f3c478d15da",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"net/rds/connection.c",
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"net/rds/tcp_listen.c"
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],
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"versions": [
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{
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"version": "4.8",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "4.8",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.10.252",
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"lessThanOrEqual": "5.10.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.15.202",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.165",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.128",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12.75",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18.16",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.19.6",
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"lessThanOrEqual": "6.19.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.0",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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"references": [
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"url": "https://git.kernel.org/stable/c/a179ac7be8f5a650d0068040705f4cddd6ca369c"
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{
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"url": "https://git.kernel.org/stable/c/f0f729bdffb08af32e0f54521b81b8a9e0321f16"
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{
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"url": "https://git.kernel.org/stable/c/81248b1eb3c5954cc1fc7b33b7c03e34d20cb8c8"
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},
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{
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"url": "https://git.kernel.org/stable/c/899ef00963ce76f9fc421a7d02335fe4ead6389b"
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},
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{
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"url": "https://git.kernel.org/stable/c/9ff599a9be784a808c36765086e3db2144aa3b66"
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},
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{
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"url": "https://git.kernel.org/stable/c/ad22d24be635c6beab6a1fdd3f8b1f3c478d15da"
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}
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],
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"title": "net/rds: No shortcut out of RDS_CONN_ERROR",
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