338 lines
16 KiB
JSON
338 lines
16 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-2026-31676",
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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": "2026-03-09T15:48:24.130Z",
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"datePublished": "2026-04-25T08:46:52.285Z",
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"dateUpdated": "2026-10-19T18:56:04.018Z"
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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": "2026-08-05T12:24:23.558Z"
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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\nrxrpc: only handle RESPONSE during service challenge\n\nOnly process RESPONSE packets while the service connection is still in\nRXRPC_CONN_SERVICE_CHALLENGING. Check that state under state_lock before\nrunning response verification and security initialization, then use a local\nsecured flag to decide whether to queue the secured-connection work after\nthe state transition. This keeps duplicate or late RESPONSE packets from\nre-running the setup path and removes the unlocked post-transition state\ntest."
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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 - RxRPC is a UDP-based network protocol, and the vulnerable RESPONSE handling is reached by packets sent to a listening AF_RXRPC service endpoint.\nAC:L - The attacker controls the packet timing and can send duplicate or late RESPONSE packets on a service connection; no uncontrollable race or special memory layout is required to trigger repeated setup processing.\nPR:N - The packet path is reached during the service-side authentication handshake before local privileges are required on the target, and a remote peer can exercise it by sending RxRPC protocol packets to the exposed service.\nUI:N - No victim user action is needed once an RxRPC service is listening; packet processing occurs in the kernel receive path.\nS:U - The impact remains within the kernel and the affected RxRPC service security authority, with no VM, sandbox, or separate security-scope escape.\nC:N - The bug re-runs connection security setup and leaks/replaces connection security objects, but I found no direct information disclosure or arbitrary read primitive.\nI:N - The reachable effect is improper repeated security initialization rather than attacker-controlled memory corruption or arbitrary modification of protected data.\nA:H - Repeated late or duplicate RESPONSE packets can repeatedly allocate and leak connection security state and disrupt/abort RxRPC connections, making kernel or service-level denial of service a reasonable impact."
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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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"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/rxrpc/conn_event.c"
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],
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{
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"status": "affected",
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"net/rxrpc/conn_event.c"
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],
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{
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"version": "2.6.22",
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{
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"version": "0",
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"lessThan": "2.6.22",
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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": "5.10.258",
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"lessThanOrEqual": "5.10.*",
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"status": "unaffected",
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},
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{
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"version": "5.15.209",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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},
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{
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"version": "6.1.175",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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},
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{
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"version": "6.6.136",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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},
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{
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"version": "6.12.84",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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},
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{
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"version": "6.18.23",
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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": "6.19.13",
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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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"cpeApplicability": [
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"url": "https://git.kernel.org/stable/c/29b44d904dceb832be880def08b8cb17a0aba91c"
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"url": "https://git.kernel.org/stable/c/d0035e634dae83237ab7f5681eb52b2f65d0ceb8"
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"url": "https://git.kernel.org/stable/c/c43ffdcfdbb5567b1f143556df8a04b4eeea041c"
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}
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],
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"title": "rxrpc: only handle RESPONSE during service challenge",
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"x_generator": {
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"engine": "bippy-1.2.0"
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"dateUpdated": "2026-10-15T01:17:45.719Z"
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},
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"versions": [
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{
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"metrics": [
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"type": "ssvc",
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"id": "CVE-2026-31676",
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "yes"
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"Technical Impact": "partial"
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"version": "2.0.3",
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"timestamp": "2026-10-16T15:12:15.479986Z"
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}
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],
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"problemTypes": [
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"descriptions": [
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{
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"lang": "en",
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"description": "CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')"
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}
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} |