CVE-2026-46170
Estado: ModificadaMedia (5.5)—
In the Linux kernel, the following vulnerability has been resolved:
mptcp: pm: ADD_ADDR rtx: free sk if last
When an ADD_ADDR is retransmitted, the sk is held in sk_reset_timer(), and released at the end.
If at that moment, it was the last reference being held, the sk would not be freed. sock_put() should then be called instead of __sock_put().
But that's not enough: if it is the last reference, sock_put() will call sk_free(), which will end up calling sk_stop_timer_sync() on the same timer, and waiting indefinitely to finish. So it is needed to mark that the timer is done at the end of the timer handler when it has not been rescheduled, not to call sk_stop_timer_sync() on "itself".
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Puntuación base: 5.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.16%
- Percentil entre todas las CVEs puntuadas: 5
- Fecha de la puntuación: 5/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (1)
CWE
- NVD-CWE-noinfo
Referencias
- https://git.kernel.org/stable/c/1f26487e83e69462540bb1047139472957c913c6
- https://git.kernel.org/stable/c/531c537b8fb620beabccfb1594e8d43cbebbb87a
- https://git.kernel.org/stable/c/5da972efed3dc7599da6e2b5e8d906d1b7b1a728
- https://git.kernel.org/stable/c/6a3af482188f6db4186d1605f64d911d7330abb3
- https://git.kernel.org/stable/c/8143a224785ceaf2b0856e08d4498916f38228fb
- https://git.kernel.org/stable/c/aa8cabde7e83bf96269ee47427dc9b59e3ed8e60
- https://git.kernel.org/stable/c/b74ad20198652b6b39a761c277ba65ae82b1e107
- https://git.kernel.org/stable/c/b7b9a461569734d33d3259d58d2507adfac107ed
JSON original (NVD)
Mostrar
{
"id": "CVE-2026-46170",
"cveTags": [],
"metrics": {
"cvssMetricV31": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 5.5,
"attackVector": "LOCAL",
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"integrityImpact": "NONE",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "LOW",
"confidentialityImpact": "NONE"
},
"impactScore": 3.6,
"exploitabilityScore": 1.8
}
]
},
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "00cfd77b9063dcdf3628a7087faba60de85a9cc8",
"lessThan": "aa8cabde7e83bf96269ee47427dc9b59e3ed8e60",
"versionType": "git"
},
{
"status": "affected",
"version": "00cfd77b9063dcdf3628a7087faba60de85a9cc8",
"lessThan": "1f26487e83e69462540bb1047139472957c913c6",
"versionType": "git"
},
{
"status": "affected",
"version": "00cfd77b9063dcdf3628a7087faba60de85a9cc8",
"lessThan": "5da972efed3dc7599da6e2b5e8d906d1b7b1a728",
"versionType": "git"
},
{
"status": "affected",
"version": "00cfd77b9063dcdf3628a7087faba60de85a9cc8",
"lessThan": "6a3af482188f6db4186d1605f64d911d7330abb3",
"versionType": "git"
},
{
"status": "affected",
"version": "00cfd77b9063dcdf3628a7087faba60de85a9cc8",
"lessThan": "531c537b8fb620beabccfb1594e8d43cbebbb87a",
"versionType": "git"
},
{
"status": "affected",
"version": "00cfd77b9063dcdf3628a7087faba60de85a9cc8",
"lessThan": "b74ad20198652b6b39a761c277ba65ae82b1e107",
"versionType": "git"
},
{
"status": "affected",
"version": "00cfd77b9063dcdf3628a7087faba60de85a9cc8",
"lessThan": "8143a224785ceaf2b0856e08d4498916f38228fb",
"versionType": "git"
},
{
"status": "affected",
"version": "00cfd77b9063dcdf3628a7087faba60de85a9cc8",
"lessThan": "b7b9a461569734d33d3259d58d2507adfac107ed",
"versionType": "git"
}
],
"programFiles": [
"net/mptcp/pm.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.10"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.10",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.270",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.218",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.185",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.142",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.92",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.30",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.0.7",
"versionType": "semver",
"lessThanOrEqual": "7.0.*"
},
{
"status": "unaffected",
"version": "7.1",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/mptcp/pm.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2026-05-28T10:16:32.650",
"references": [
{
"url": "https://git.kernel.org/stable/c/1f26487e83e69462540bb1047139472957c913c6",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/531c537b8fb620beabccfb1594e8d43cbebbb87a",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/5da972efed3dc7599da6e2b5e8d906d1b7b1a728",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/6a3af482188f6db4186d1605f64d911d7330abb3",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/8143a224785ceaf2b0856e08d4498916f38228fb",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/aa8cabde7e83bf96269ee47427dc9b59e3ed8e60",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/b74ad20198652b6b39a761c277ba65ae82b1e107",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/b7b9a461569734d33d3259d58d2507adfac107ed",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Modified",
"weaknesses": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"description": [
{
"lang": "en",
"value": "NVD-CWE-noinfo"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmptcp: pm: ADD_ADDR rtx: free sk if last\n\nWhen an ADD_ADDR is retransmitted, the sk is held in sk_reset_timer(),\nand released at the end.\n\nIf at that moment, it was the last reference being held, the sk would\nnot be freed. sock_put() should then be called instead of __sock_put().\n\nBut that's not enough: if it is the last reference, sock_put() will call\nsk_free(), which will end up calling sk_stop_timer_sync() on the same\ntimer, and waiting indefinitely to finish. So it is needed to mark that\nthe timer is done at the end of the timer handler when it has not been\nrescheduled, not to call sk_stop_timer_sync() on \"itself\"."
}
],
"lastModified": "2026-09-14T12:17:42.270",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "480951DC-CB56-4EBC-91A2-355288564ED6",
"versionEndExcluding": "6.6.142",
"versionStartIncluding": "5.10"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "9CB90BD9-95B7-4D7F-9F17-4ECE6CFB66C9",
"versionEndExcluding": "6.12.92",
"versionStartIncluding": "6.7"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "BF39AE08-AE6D-4410-8FBE-76F6BF5BF55B",
"versionEndExcluding": "6.18.30",
"versionStartIncluding": "6.13"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "D0893CA7-9AE6-4DFE-AC75-48967D73AD8E",
"versionEndExcluding": "7.0.7",
"versionStartIncluding": "6.19"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "B1EF7059-E670-45F4-B422-54C40FA86390"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "0D38F0BF-A728-4133-A358-D44A2F7EE6D6"
}
],
"operator": "OR"
}
]
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}