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vuln-cve/data/2023/53xxx/CVE-2023-53189.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2023-53189",
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"state": "PUBLISHED",
"assignerShortName": "Linux",
"dateReserved": "2025-09-15T13:59:19.066Z",
"datePublished": "2025-09-15T14:05:26.685Z",
"dateUpdated": "2026-10-15T21:41:27.813Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux",
"dateUpdated": "2026-08-05T09:13:02.180Z"
},
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv6/addrconf: fix a potential refcount underflow for idev\n\nNow in addrconf_mod_rs_timer(), reference idev depends on whether\nrs_timer is not pending. Then modify rs_timer timeout.\n\nThere is a time gap in [1], during which if the pending rs_timer\nbecomes not pending. It will miss to hold idev, but the rs_timer\nis activated. Thus rs_timer callback function addrconf_rs_timer()\nwill be executed and put idev later without holding idev. A refcount\nunderflow issue for idev can be caused by this.\n\n\tif (!timer_pending(&idev->rs_timer))\n\t\tin6_dev_hold(idev);\n\t\t <--------------[1]\n\tmod_timer(&idev->rs_timer, jiffies + when);\n\nTo fix the issue, hold idev if mod_timer() return 0."
}
],
"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 bug is only reachable via local IPv6 addrconf paths that call addrconf_mod_rs_timer()—DAD completion on interface bring-up and inet6_set_iftoken() via rtnetlink—not via processing remote packets.\nAC:L - An attacker who can configure the netns controls both sides of the race: they can arm the RS timer, set a very short router_solicitation_interval via netns sysctl, and spam set_iftoken/ifup to hit the timer_pending-to-mod_timer window as the timer fires.\nPR:L - Triggering requires CAP_NET_ADMIN for interface/token/sysctl configuration, which an unprivileged user can obtain inside a user+network namespace; it does not require host-init-namespace root.\nUI:N - No victim interaction is needed; the attacker performs all interface and netlink operations themselves.\nS:U - Impact is memory corruption within the same kernel networking authority (inet6_dev UAF/refcount corruption), not a cross-boundary escape.\nC:H - The missed in6_dev_hold lets addrconf_rs_timer() put without a matching hold, which can free or leave inet6_dev at refcnt 0 while still reachable via the device, enabling a use-after-free read primitive.\nI:H - The same inet6_dev use-after-free/refcount corruption can be exploited for heap reuse and arbitrary write/control-flow hijack against the kernel network stack.\nA:H - Refcount underflow or premature destruction of inet6_dev leads to kernel WARN/oops, unstable networking state, or crash when the dangling idev is used."
}
]
}
],
"affected": [
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"net/ipv6/addrconf.c"
],
"versions": [
{
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"lessThan": "c6395e32935d35e6f935e7caf1c2dac5a95943b4",
"status": "affected",
"versionType": "git"
},
{
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"lessThan": "df62fdcd004afa72ecbed0e862ebb983acd3aa57",
"status": "affected",
"versionType": "git"
},
{
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"lessThan": "c7eeba47058532f6077d6a658e38b6698f6ae71a",
"status": "affected",
"versionType": "git"
},
{
"version": "b7b1bfce0bb68bd8f6e62a28295922785cc63781",
"lessThan": "2ad31ce40e8182860b631e37209e93e543790b7c",
"status": "affected",
"versionType": "git"
},
{
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"lessThan": "82abd1c37d3bf2a2658b34772c17a25a6f9cca42",
"status": "affected",
"versionType": "git"
},
{
"version": "b7b1bfce0bb68bd8f6e62a28295922785cc63781",
"lessThan": "436b7cc7eae7851c184b671ed7a4a64c750b86f7",
"status": "affected",
"versionType": "git"
},
{
"version": "b7b1bfce0bb68bd8f6e62a28295922785cc63781",
"lessThan": "1f656e483eb4733d62f18dfb206a49b78f60f495",
"status": "affected",
"versionType": "git"
},
{
"version": "b7b1bfce0bb68bd8f6e62a28295922785cc63781",
"lessThan": "06a0716949c22e2aefb648526580671197151acc",
"status": "affected",
"versionType": "git"
},
{
"version": "973d5956f754cfc306f5e274d71503498f4b0324",
"status": "affected",
"versionType": "git"
},
{
"version": "3.10.105",
"lessThan": "3.11",
"status": "affected",
"versionType": "semver"
}
]
},
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "affected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"net/ipv6/addrconf.c"
],
"versions": [
{
"version": "3.11",
"status": "affected"
},
{
"version": "0",
"lessThan": "3.11",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "4.14.322",
"lessThanOrEqual": "4.14.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "4.19.291",
"lessThanOrEqual": "4.19.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.4.251",
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.10.188",
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.15.121",
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.1.40",
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.4.5",
"lessThanOrEqual": "6.4.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.5",
"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": "3.11",
"versionEndExcluding": "4.14.322"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "3.11",
"versionEndExcluding": "4.19.291"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "3.11",
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},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "3.11",
"versionEndExcluding": "5.10.188"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "3.11",
"versionEndExcluding": "5.15.121"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "3.11",
"versionEndExcluding": "6.1.40"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "3.11",
"versionEndExcluding": "6.4.5"
},
{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "3.11",
"versionEndExcluding": "6.5"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "3.10.105"
}
]
}
]
}
],
"references": [
{
"url": "https://git.kernel.org/stable/c/c6395e32935d35e6f935e7caf1c2dac5a95943b4"
},
{
"url": "https://git.kernel.org/stable/c/df62fdcd004afa72ecbed0e862ebb983acd3aa57"
},
{
"url": "https://git.kernel.org/stable/c/c7eeba47058532f6077d6a658e38b6698f6ae71a"
},
{
"url": "https://git.kernel.org/stable/c/2ad31ce40e8182860b631e37209e93e543790b7c"
},
{
"url": "https://git.kernel.org/stable/c/82abd1c37d3bf2a2658b34772c17a25a6f9cca42"
},
{
"url": "https://git.kernel.org/stable/c/436b7cc7eae7851c184b671ed7a4a64c750b86f7"
},
{
"url": "https://git.kernel.org/stable/c/1f656e483eb4733d62f18dfb206a49b78f60f495"
},
{
"url": "https://git.kernel.org/stable/c/06a0716949c22e2aefb648526580671197151acc"
}
],
"title": "ipv6/addrconf: fix a potential refcount underflow for idev",
"x_generator": {
"engine": "bippy-1.2.0"
}
},
"adp": [
{
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"id": "CVE-2023-53189",
"role": "CISA Coordinator",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"version": "2.0.3",
"timestamp": "2026-10-15T21:34:23.338472Z"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-10-15T21:41:27.813Z"
}
}
]
}
}
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