266 lines
14 KiB
JSON
266 lines
14 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-2026-43373",
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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": "2026-05-01T14:12:56.006Z",
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"datePublished": "2026-05-08T14:21:23.875Z",
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"dateUpdated": "2026-08-05T12:27:33.592Z"
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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": "2026-08-05T12:27:33.592Z"
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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: ncsi: fix skb leak in error paths\n\nEarly return paths in NCSI RX and AEN handlers fail to release\nthe received skb, resulting in a memory leak.\n\nSpecifically, ncsi_aen_handler() returns on invalid AEN packets\nwithout consuming the skb. Similarly, ncsi_rcv_rsp() exits early\nwhen failing to resolve the NCSI device, response handler, or\nrequest, leaving the skb unfreed."
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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 handlers are reached through the kernel Ethernet receive path for ETH_P_NCSI frames on an NCSI-enabled network device. A remote peer capable of delivering NCSI frames to the management interface can trigger the bug with network packets.\nAC:L - Triggering only requires malformed or unmatched NCSI response/AEN packets that take deterministic early error paths. No race, timing, or hard-to-control system state is required.\nPR:N - The packet receive path performs no credential, capability, or authentication checks before entering ncsi_rcv_rsp() or ncsi_aen_handler(). Local NCSI netlink operations may require admin permission, but the vulnerable receive path does not.\nUI:N - No victim user action is needed. Packets are processed automatically by the network receive stack.\nS:U - The impact remains within the kernel and the affected NCSI/network device security authority. There is no VM, sandbox, IOMMU, or other cross-scope boundary crossing.\nC:N - The fixed bug is a missing kfree_skb()/consume_skb() on error paths, not an information disclosure. The leaked skb is not exposed back to the attacker.\nI:N - The bug does not corrupt memory or provide a write primitive. It only retains references to received skb objects that should have been freed.\nA:H - Each trigger leaks a received skb, and the attacker can repeat this indefinitely with malformed or unmatched NCSI packets. On plausible BMC/management-controller deployments this can exhaust kernel memory and deny service."
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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/ncsi/ncsi-aen.c",
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"net/ncsi/ncsi-rsp.c"
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],
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"versions": [
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{
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"version": "138635cc27c9737f940c3aa80912ff7a61c825af",
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"lessThan": "9891d7f4f1ede473c54b49776ae07755083eef06",
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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": "138635cc27c9737f940c3aa80912ff7a61c825af",
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"lessThan": "fef5aa6e3bcf3c8053307642663a63b7362d7552",
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"status": "affected",
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},
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{
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"version": "138635cc27c9737f940c3aa80912ff7a61c825af",
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"lessThan": "81d6aee32f8f7bbc175c05dbf61f4430bfb88c4a",
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"status": "affected",
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},
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"lessThan": "59962588197863d0d746879f193905c0c6b3df49",
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"status": "affected",
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},
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{
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"version": "138635cc27c9737f940c3aa80912ff7a61c825af",
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"lessThan": "553366c271479c0d571dd1bb5d1bcde4747fb82e",
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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": "138635cc27c9737f940c3aa80912ff7a61c825af",
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"lessThan": "b70c4e5e711931cdd56e6e905737b72f1e649189",
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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": "138635cc27c9737f940c3aa80912ff7a61c825af",
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"lessThan": "87138dde2d6937b12b967f28fe598a7d59000ae4",
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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": "138635cc27c9737f940c3aa80912ff7a61c825af",
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"lessThan": "5c3398a54266541610c8d0a7082e654e9ff3e259",
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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/ncsi/ncsi-aen.c",
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"net/ncsi/ncsi-rsp.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": "5.10.253",
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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": "5.15.203",
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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": "6.1.167",
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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": "6.6.130",
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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": "6.12.78",
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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": "6.18.19",
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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": "6.19.9",
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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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"versionStartIncluding": "4.8",
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"versionEndExcluding": "5.10.253"
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"references": [
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"url": "https://git.kernel.org/stable/c/9891d7f4f1ede473c54b49776ae07755083eef06"
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{
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"url": "https://git.kernel.org/stable/c/fef5aa6e3bcf3c8053307642663a63b7362d7552"
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{
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"url": "https://git.kernel.org/stable/c/81d6aee32f8f7bbc175c05dbf61f4430bfb88c4a"
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},
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{
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"url": "https://git.kernel.org/stable/c/59962588197863d0d746879f193905c0c6b3df49"
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},
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{
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"url": "https://git.kernel.org/stable/c/553366c271479c0d571dd1bb5d1bcde4747fb82e"
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},
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{
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"url": "https://git.kernel.org/stable/c/b70c4e5e711931cdd56e6e905737b72f1e649189"
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{
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"url": "https://git.kernel.org/stable/c/87138dde2d6937b12b967f28fe598a7d59000ae4"
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},
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{
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"url": "https://git.kernel.org/stable/c/5c3398a54266541610c8d0a7082e654e9ff3e259"
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}
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],
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"title": "net: ncsi: fix skb leak in error paths",
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