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vuln-cve/data/2026/53xxx/CVE-2026-53270.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-53270",
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"state": "PUBLISHED",
"assignerShortName": "Linux",
"dateReserved": "2026-06-09T07:44:35.395Z",
"datePublished": "2026-06-25T08:39:55.830Z",
"dateUpdated": "2026-10-19T19:57:32.999Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux",
"dateUpdated": "2026-08-05T12:34:46.621Z"
},
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nipvs: clear the svc scheduler ptr early on edit\n\nip_vs_edit_service() while unbinding the old scheduler clears\nthe svc->scheduler ptr after the scheduler module initiates\nRCU callbacks. This can cause packets to use the old\nscheduler at the time when svc->sched_data is already freed\nafter RCU grace period.\n\nFix it by clearing the ptr early in ip_vs_unbind_scheduler(),\nbefore the done_service method schedules any RCU callbacks.\n\nAlso, if the new scheduler fails to initialize when replacing\nthe old scheduler, try to restore the old scheduler while still\nreturning the error code."
}
],
"metrics": [
{
"cvssV3_1": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"baseScore": 7.8,
"baseSeverity": "HIGH"
},
"scenarios": [
{
"lang": "en",
"value": "AV:L - The vulnerable transition is reached through local IPVS service-edit control paths such as `setsockopt(IP_VS_SO_SET_EDIT)` or IPVS generic netlink; packets exercise the stale scheduler afterward, but the attacker must initiate the local service edit.\nAC:L - The attacker can control both sides of the condition by changing the scheduler and generating new TCP/UDP/SCTP traffic to the service, so this is not dependent on an uncontrollable race.\nPR:L - The legacy setsockopt path checks `CAP_NET_ADMIN` in the socket network namespace, which is reachable by an unprivileged local user via user and network namespaces in plausible deployments.\nUI:N - No victim interaction is needed once the attacker has local access and namespace privileges; the attacker can create/edit the IPVS service and send triggering traffic.\nS:U - The impact is kernel memory corruption within the same host security authority, not a VM, IOMMU, or separate security-scope escape.\nC:H - This is an RCU use-after-free of scheduler-private `svc->sched_data`, and freed scheduler state can be reused and dereferenced by packet scheduling, making high confidentiality impact defensible.\nI:H - Several affected schedulers write through the stale `sched_data` pointer, so the UAF can plausibly become arbitrary kernel memory corruption or control-flow compromise.\nA:H - At minimum the stale scheduler pointer can dereference freed scheduler state during packet processing and crash or panic the kernel."
}
]
}
],
"affected": [
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"include/net/ip_vs.h",
"net/netfilter/ipvs/ip_vs_ctl.c",
"net/netfilter/ipvs/ip_vs_sched.c"
],
"versions": [
{
"version": "05f00505a89acd21f5d0d20f5797dfbc4cf85243",
"lessThan": "d10730a1f2caf08088e0db1b19b242f3e6fa5f06",
"status": "affected",
"versionType": "git"
},
{
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"lessThan": "e4feec3174036ba772006be74beee0efa09a9eb8",
"status": "affected",
"versionType": "git"
},
{
"version": "05f00505a89acd21f5d0d20f5797dfbc4cf85243",
"lessThan": "7d4f5004511757e3984901ffb412fcf858d80ed5",
"status": "affected",
"versionType": "git"
},
{
"version": "05f00505a89acd21f5d0d20f5797dfbc4cf85243",
"lessThan": "c6376b9b1b4d2bad638256b1b3588e073344ae69",
"status": "affected",
"versionType": "git"
},
{
"version": "05f00505a89acd21f5d0d20f5797dfbc4cf85243",
"lessThan": "14e4689c113b4c06af1069364ade24fdd7055f33",
"status": "affected",
"versionType": "git"
},
{
"version": "05f00505a89acd21f5d0d20f5797dfbc4cf85243",
"lessThan": "25918720ba97f974a4f8d433b5a0132c5b43f6f3",
"status": "affected",
"versionType": "git"
},
{
"version": "05f00505a89acd21f5d0d20f5797dfbc4cf85243",
"lessThan": "19a9493faa4bf3c7bd0a386f30b60b1bb4a3da03",
"status": "affected",
"versionType": "git"
},
{
"version": "05f00505a89acd21f5d0d20f5797dfbc4cf85243",
"lessThan": "193989cc6d80dd8e0460fb3992e69fa03bf0ff9b",
"status": "affected",
"versionType": "git"
},
{
"version": "c803fddd2a95a70873c68dbff42d4c59fd2e674e",
"status": "affected",
"versionType": "git"
},
{
"version": "4ec8fb23158797affae7993c15beba080488482f",
"status": "affected",
"versionType": "git"
},
{
"version": "3.18.23",
"lessThan": "3.19",
"status": "affected",
"versionType": "semver"
},
{
"version": "4.1.11",
"lessThan": "4.2",
"status": "affected",
"versionType": "semver"
}
]
},
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "affected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"include/net/ip_vs.h",
"net/netfilter/ipvs/ip_vs_ctl.c",
"net/netfilter/ipvs/ip_vs_sched.c"
],
"versions": [
{
"version": "4.2",
"status": "affected"
},
{
"version": "0",
"lessThan": "4.2",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.10.259",
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.15.210",
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.1.176",
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.6.143",
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.12.94",
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.18.36",
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "7.0.13",
"lessThanOrEqual": "7.0.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "7.1",
"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": "4.2",
"versionEndExcluding": "5.10.259"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.2",
"versionEndExcluding": "5.15.210"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.2",
"versionEndExcluding": "6.1.176"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.2",
"versionEndExcluding": "6.6.143"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.2",
"versionEndExcluding": "6.12.94"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.2",
"versionEndExcluding": "6.18.36"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.2",
"versionEndExcluding": "7.0.13"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.2",
"versionEndExcluding": "7.1"
},
{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "3.18.23"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.1.11"
}
]
}
]
}
],
"references": [
{
"url": "https://git.kernel.org/stable/c/d10730a1f2caf08088e0db1b19b242f3e6fa5f06"
},
{
"url": "https://git.kernel.org/stable/c/e4feec3174036ba772006be74beee0efa09a9eb8"
},
{
"url": "https://git.kernel.org/stable/c/7d4f5004511757e3984901ffb412fcf858d80ed5"
},
{
"url": "https://git.kernel.org/stable/c/c6376b9b1b4d2bad638256b1b3588e073344ae69"
},
{
"url": "https://git.kernel.org/stable/c/14e4689c113b4c06af1069364ade24fdd7055f33"
},
{
"url": "https://git.kernel.org/stable/c/25918720ba97f974a4f8d433b5a0132c5b43f6f3"
},
{
"url": "https://git.kernel.org/stable/c/19a9493faa4bf3c7bd0a386f30b60b1bb4a3da03"
},
{
"url": "https://git.kernel.org/stable/c/193989cc6d80dd8e0460fb3992e69fa03bf0ff9b"
}
],
"title": "ipvs: clear the svc scheduler ptr early on edit",
"x_generator": {
"engine": "bippy-1.2.0"
}
},
"adp": [
{
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"id": "CVE-2026-53270",
"role": "CISA Coordinator",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"version": "2.0.3",
"timestamp": "2026-10-16T15:28:13.169684Z"
}
}
}
],
"problemTypes": [
{
"descriptions": [
{
"lang": "en",
"type": "CWE",
"cweId": "CWE-416",
"description": "CWE-416 Use After Free"
}
]
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-10-19T19:57:32.999Z"
}
}
]
}
}
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