CVE-2025-40248 (GCVE-0-2025-40248)
Vulnerability from cvelistv5 – Published: 2025-12-04 16:08 – Updated: 2026-08-05 12:08
VLAI
EPSS
VEX
Title
vsock: Ignore signal/timeout on connect() if already established
Summary
In the Linux kernel, the following vulnerability has been resolved:
vsock: Ignore signal/timeout on connect() if already established
During connect(), acting on a signal/timeout by disconnecting an already
established socket leads to several issues:
1. connect() invoking vsock_transport_cancel_pkt() ->
virtio_transport_purge_skbs() may race with sendmsg() invoking
virtio_transport_get_credit(). This results in a permanently elevated
`vvs->bytes_unsent`. Which, in turn, confuses the SOCK_LINGER handling.
2. connect() resetting a connected socket's state may race with socket
being placed in a sockmap. A disconnected socket remaining in a sockmap
breaks sockmap's assumptions. And gives rise to WARNs.
3. connect() transitioning SS_CONNECTED -> SS_UNCONNECTED allows for a
transport change/drop after TCP_ESTABLISHED. Which poses a problem for
any simultaneous sendmsg() or connect() and may result in a
use-after-free/null-ptr-deref.
Do not disconnect socket on signal/timeout. Keep the logic for unconnected
sockets: they don't linger, can't be placed in a sockmap, are rejected by
sendmsg().
[1]: https://lore.kernel.org/netdev/e07fd95c-9a38-4eea-9638-133e38c2ec9b@rbox.co/
[2]: https://lore.kernel.org/netdev/20250317-vsock-trans-signal-race-v4-0-fc8837f3f1d4@rbox.co/
[3]: https://lore.kernel.org/netdev/60f1b7db-3099-4f6a-875e-af9f6ef194f6@rbox.co/
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-16 20:01 UTC
Assigner
References
9 references
Impacted products
3 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
d021c344051af91f42c5ba9fdedc176740cbd238 , < 3f71753935d648082a8279a97d30efe6b85be680
(git)
Affected: d021c344051af91f42c5ba9fdedc176740cbd238 , < da664101fb4a0de5cb70d2bae6a650df954df2af (git) Affected: d021c344051af91f42c5ba9fdedc176740cbd238 , < 67432915145848658149683101104e32f9fd6559 (git) Affected: d021c344051af91f42c5ba9fdedc176740cbd238 , < eeca93f06df89be5a36305b7b9dae1ed65550dfc (git) Affected: d021c344051af91f42c5ba9fdedc176740cbd238 , < 5998da5a8208ae9ad7838ba322bccb2bdcd95e81 (git) Affected: d021c344051af91f42c5ba9fdedc176740cbd238 , < f1c170cae285e4b8f61be043bb17addc3d0a14b5 (git) Affected: d021c344051af91f42c5ba9fdedc176740cbd238 , < ab6b19f690d89ae4709fba73a3c4a7911f495b7a (git) Affected: d021c344051af91f42c5ba9fdedc176740cbd238 , < 002541ef650b742a198e4be363881439bb9d86b4 (git) |
guessed | |
| Linux | Linux |
Affected:
3.9
Unaffected: 0 , < 3.9 (semver) Unaffected: 5.4.302 , ≤ 5.4.* (semver) Unaffected: 5.10.247 , ≤ 5.10.* (semver) Unaffected: 5.15.197 , ≤ 5.15.* (semver) Unaffected: 6.1.159 , ≤ 6.1.* (semver) Unaffected: 6.6.118 , ≤ 6.6.* (semver) Unaffected: 6.12.60 , ≤ 6.12.* (semver) Unaffected: 6.17.10 , ≤ 6.17.* (semver) Unaffected: 6.18 , ≤ * (original_commit_for_fix) |
guessed | |
| Siemens | RUGGEDCOM RST2428P |
Affected:
0 , < V4.0
(custom)
|
guessed |
{
"containers": {
"adp": [
{
"affected": [
{
"defaultStatus": "unknown",
"product": "RUGGEDCOM RST2428P",
"vendor": "Siemens",
"versions": [
{
"lessThan": "V4.0",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-06-02T12:59:57.735Z",
"orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e",
"shortName": "siemens-SADP"
},
"references": [
{
"url": "https://cert-portal.siemens.com/productcert/html/ssa-253495.html"
}
],
"x_adpType": "supplier"
},
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2025-40248",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-06-16T20:01:10.557430Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-06-16T20:01:18.965Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"net/vmw_vsock/af_vsock.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "3f71753935d648082a8279a97d30efe6b85be680",
"status": "affected",
"version": "d021c344051af91f42c5ba9fdedc176740cbd238",
"versionType": "git"
},
{
"lessThan": "da664101fb4a0de5cb70d2bae6a650df954df2af",
"status": "affected",
"version": "d021c344051af91f42c5ba9fdedc176740cbd238",
"versionType": "git"
},
{
"lessThan": "67432915145848658149683101104e32f9fd6559",
"status": "affected",
"version": "d021c344051af91f42c5ba9fdedc176740cbd238",
"versionType": "git"
},
{
"lessThan": "eeca93f06df89be5a36305b7b9dae1ed65550dfc",
"status": "affected",
"version": "d021c344051af91f42c5ba9fdedc176740cbd238",
"versionType": "git"
},
{
"lessThan": "5998da5a8208ae9ad7838ba322bccb2bdcd95e81",
"status": "affected",
"version": "d021c344051af91f42c5ba9fdedc176740cbd238",
"versionType": "git"
},
{
"lessThan": "f1c170cae285e4b8f61be043bb17addc3d0a14b5",
"status": "affected",
"version": "d021c344051af91f42c5ba9fdedc176740cbd238",
"versionType": "git"
},
{
"lessThan": "ab6b19f690d89ae4709fba73a3c4a7911f495b7a",
"status": "affected",
"version": "d021c344051af91f42c5ba9fdedc176740cbd238",
"versionType": "git"
},
{
"lessThan": "002541ef650b742a198e4be363881439bb9d86b4",
"status": "affected",
"version": "d021c344051af91f42c5ba9fdedc176740cbd238",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"net/vmw_vsock/af_vsock.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "3.9"
},
{
"lessThan": "3.9",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"version": "5.4.302",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.247",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.197",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.159",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.118",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.60",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.17.*",
"status": "unaffected",
"version": "6.17.10",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.18",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.4.302",
"versionStartIncluding": "3.9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.10.247",
"versionStartIncluding": "3.9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.15.197",
"versionStartIncluding": "3.9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.159",
"versionStartIncluding": "3.9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.6.118",
"versionStartIncluding": "3.9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12.60",
"versionStartIncluding": "3.9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.17.10",
"versionStartIncluding": "3.9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.18",
"versionStartIncluding": "3.9",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvsock: Ignore signal/timeout on connect() if already established\n\nDuring connect(), acting on a signal/timeout by disconnecting an already\nestablished socket leads to several issues:\n\n1. connect() invoking vsock_transport_cancel_pkt() -\u003e\n virtio_transport_purge_skbs() may race with sendmsg() invoking\n virtio_transport_get_credit(). This results in a permanently elevated\n `vvs-\u003ebytes_unsent`. Which, in turn, confuses the SOCK_LINGER handling.\n\n2. connect() resetting a connected socket\u0027s state may race with socket\n being placed in a sockmap. A disconnected socket remaining in a sockmap\n breaks sockmap\u0027s assumptions. And gives rise to WARNs.\n\n3. connect() transitioning SS_CONNECTED -\u003e SS_UNCONNECTED allows for a\n transport change/drop after TCP_ESTABLISHED. Which poses a problem for\n any simultaneous sendmsg() or connect() and may result in a\n use-after-free/null-ptr-deref.\n\nDo not disconnect socket on signal/timeout. Keep the logic for unconnected\nsockets: they don\u0027t linger, can\u0027t be placed in a sockmap, are rejected by\nsendmsg().\n\n[1]: https://lore.kernel.org/netdev/e07fd95c-9a38-4eea-9638-133e38c2ec9b@rbox.co/\n[2]: https://lore.kernel.org/netdev/20250317-vsock-trans-signal-race-v4-0-fc8837f3f1d4@rbox.co/\n[3]: https://lore.kernel.org/netdev/60f1b7db-3099-4f6a-875e-af9f6ef194f6@rbox.co/"
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 7.8,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"scenarios": [
{
"lang": "en",
"value": "AV:L - The vulnerability is triggered through AF_VSOCK socket syscalls (connect/sendmsg) plus signal delivery from a local process; per kernel scoring guidance vsock is a local attack surface. No network packet from an unauthenticated remote peer can drive the signal/timeout race.\nAC:L - The attacker controls both sides of the race \u2014 the listening peer (vsock_loopback/VMADDR_CID_LOCAL requires no VM), the exact moment of connection establishment, the signal storm from a sibling thread, and the concurrent sendmsg()/second connect() \u2014 and can retry indefinitely until the window is hit.\nPR:L - vsock_create() performs no capability check, so any unprivileged local user (including inside a container) can create AF_VSOCK sockets and reach vsock_connect(). No root, CAP_NET_ADMIN, or namespace trickery is needed.\nUI:N - The attacker\u0027s own threads perform every step \u2014 connect, accept, signal delivery, and the follow-up connect/sendmsg. No victim action is required.\nS:U - The corruption and its impact are confined to the kernel\u0027s own security authority; there is no guest-to-host or IOMMU boundary crossing involved in the freed vsock transport state.\nC:H - The transport change/drop after TCP_ESTABLISHED yields a use-after-free of the kmalloc\u0027d virtio_vsock_sock and a stale transport ops pointer reachable from sendmsg(); heap reclaim of the freed object gives an attacker-controlled read primitive over kernel memory.\nI:H - The same use-after-free permits heap spraying over the freed transport state and invocation of function pointers from a stale ops/module reference, providing a write and control-flow hijack primitive as in prior vsock UAF exploits.\nA:H - The commit explicitly notes use-after-free/NULL-pointer dereference, plus sockmap WARNs and a permanently elevated bytes_unsent that breaks SOCK_LINGER handling \u2014 any of which oops or hang the kernel, and the race can be re-run at will."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-05T12:08:50.554Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/3f71753935d648082a8279a97d30efe6b85be680"
},
{
"url": "https://git.kernel.org/stable/c/da664101fb4a0de5cb70d2bae6a650df954df2af"
},
{
"url": "https://git.kernel.org/stable/c/67432915145848658149683101104e32f9fd6559"
},
{
"url": "https://git.kernel.org/stable/c/eeca93f06df89be5a36305b7b9dae1ed65550dfc"
},
{
"url": "https://git.kernel.org/stable/c/5998da5a8208ae9ad7838ba322bccb2bdcd95e81"
},
{
"url": "https://git.kernel.org/stable/c/f1c170cae285e4b8f61be043bb17addc3d0a14b5"
},
{
"url": "https://git.kernel.org/stable/c/ab6b19f690d89ae4709fba73a3c4a7911f495b7a"
},
{
"url": "https://git.kernel.org/stable/c/002541ef650b742a198e4be363881439bb9d86b4"
}
],
"title": "vsock: Ignore signal/timeout on connect() if already established",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2025-40248",
"datePublished": "2025-12-04T16:08:11.509Z",
"dateReserved": "2025-04-16T07:20:57.181Z",
"dateUpdated": "2026-08-05T12:08:50.554Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2025-40248",
"date": "2026-09-15",
"epss": "0.00157",
"percentile": "0.05221"
},
"nvd": "{\"cve\":{\"id\":\"CVE-2025-40248\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-12-04T16:16:18.240\",\"lastModified\":\"2026-07-30T06:24:21.523\",\"vulnStatus\":\"Deferred\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nvsock: Ignore signal/timeout on connect() if already established\\n\\nDuring connect(), acting on a signal/timeout by disconnecting an already\\nestablished socket leads to several issues:\\n\\n1. connect() invoking vsock_transport_cancel_pkt() -\u003e\\n virtio_transport_purge_skbs() may race with sendmsg() invoking\\n virtio_transport_get_credit(). This results in a permanently elevated\\n `vvs-\u003ebytes_unsent`. Which, in turn, confuses the SOCK_LINGER handling.\\n\\n2. connect() resetting a connected socket\u0027s state may race with socket\\n being placed in a sockmap. A disconnected socket remaining in a sockmap\\n breaks sockmap\u0027s assumptions. And gives rise to WARNs.\\n\\n3. connect() transitioning SS_CONNECTED -\u003e SS_UNCONNECTED allows for a\\n transport change/drop after TCP_ESTABLISHED. Which poses a problem for\\n any simultaneous sendmsg() or connect() and may result in a\\n use-after-free/null-ptr-deref.\\n\\nDo not disconnect socket on signal/timeout. Keep the logic for unconnected\\nsockets: they don\u0027t linger, can\u0027t be placed in a sockmap, are rejected by\\nsendmsg().\\n\\n[1]: https://lore.kernel.org/netdev/e07fd95c-9a38-4eea-9638-133e38c2ec9b@rbox.co/\\n[2]: https://lore.kernel.org/netdev/20250317-vsock-trans-signal-race-v4-0-fc8837f3f1d4@rbox.co/\\n[3]: https://lore.kernel.org/netdev/60f1b7db-3099-4f6a-875e-af9f6ef194f6@rbox.co/\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"net/vmw_vsock/af_vsock.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"d021c344051af91f42c5ba9fdedc176740cbd238\",\"lessThan\":\"3f71753935d648082a8279a97d30efe6b85be680\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d021c344051af91f42c5ba9fdedc176740cbd238\",\"lessThan\":\"da664101fb4a0de5cb70d2bae6a650df954df2af\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d021c344051af91f42c5ba9fdedc176740cbd238\",\"lessThan\":\"67432915145848658149683101104e32f9fd6559\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d021c344051af91f42c5ba9fdedc176740cbd238\",\"lessThan\":\"eeca93f06df89be5a36305b7b9dae1ed65550dfc\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d021c344051af91f42c5ba9fdedc176740cbd238\",\"lessThan\":\"5998da5a8208ae9ad7838ba322bccb2bdcd95e81\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d021c344051af91f42c5ba9fdedc176740cbd238\",\"lessThan\":\"f1c170cae285e4b8f61be043bb17addc3d0a14b5\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d021c344051af91f42c5ba9fdedc176740cbd238\",\"lessThan\":\"ab6b19f690d89ae4709fba73a3c4a7911f495b7a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d021c344051af91f42c5ba9fdedc176740cbd238\",\"lessThan\":\"002541ef650b742a198e4be363881439bb9d86b4\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"net/vmw_vsock/af_vsock.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"3.9\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"3.9\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.4.302\",\"lessThanOrEqual\":\"5.4.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.247\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.197\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.159\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.118\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.60\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.17.10\",\"lessThanOrEqual\":\"6.17.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]},{\"source\":\"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e\",\"affectedData\":[{\"vendor\":\"Siemens\",\"product\":\"RUGGEDCOM RST2428P\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"0\",\"lessThan\":\"V4.0\",\"versionType\":\"custom\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"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\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-06-16T20:01:10.557430Z\",\"id\":\"CVE-2025-40248\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/002541ef650b742a198e4be363881439bb9d86b4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/3f71753935d648082a8279a97d30efe6b85be680\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/5998da5a8208ae9ad7838ba322bccb2bdcd95e81\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/67432915145848658149683101104e32f9fd6559\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ab6b19f690d89ae4709fba73a3c4a7911f495b7a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/da664101fb4a0de5cb70d2bae6a650df954df2af\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/eeca93f06df89be5a36305b7b9dae1ed65550dfc\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f1c170cae285e4b8f61be043bb17addc3d0a14b5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://cert-portal.siemens.com/productcert/html/ssa-253495.html\",\"source\":\"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e\"}]}}",
"redhat_vex": {
"aggregate_severity": "Important",
"current_release_date": "2026-07-30T08:16:35+00:00",
"cve": "CVE-2025-40248",
"id": "CVE-2025-40248",
"initial_release_date": "2025-12-04T00:00:00+00:00",
"product_status:fixed": "2654",
"product_status:known_affected": "22",
"product_status:known_not_affected": "14",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: Linux kernel: vsock vulnerability may lead to memory corruption",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-40248.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-09-11T01:54:29Z",
"cve": "CVE-2025-40248",
"id": "CVE-2025-40248",
"initial_release_date": "2025-12-05T00:25:33Z",
"product_status:first_fixed": "2",
"product_status:known_affected": "804",
"product_status:known_not_affected": "6",
"product_status:recommended": "442",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2025-40248",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-40248.json",
"version": "48"
},
"vulnrichment": {
"containers": "{\"adp\": [{\"affected\": [{\"vendor\": \"Siemens\", \"product\": \"RUGGEDCOM RST2428P\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"lessThan\": \"V4.0\", \"versionType\": \"custom\"}], \"defaultStatus\": \"unknown\"}], \"x_adpType\": \"supplier\", \"references\": [{\"url\": \"https://cert-portal.siemens.com/productcert/html/ssa-253495.html\"}], \"providerMetadata\": {\"orgId\": \"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e\", \"shortName\": \"siemens-SADP\", \"dateUpdated\": \"2026-06-02T12:59:57.735Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2025-40248\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-06-16T20:01:10.557430Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-06-16T20:01:14.928Z\"}}], \"cna\": {\"title\": \"vsock: Ignore signal/timeout on connect() if already established\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"d021c344051af91f42c5ba9fdedc176740cbd238\", \"lessThan\": \"3f71753935d648082a8279a97d30efe6b85be680\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"d021c344051af91f42c5ba9fdedc176740cbd238\", \"lessThan\": \"da664101fb4a0de5cb70d2bae6a650df954df2af\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"d021c344051af91f42c5ba9fdedc176740cbd238\", \"lessThan\": \"67432915145848658149683101104e32f9fd6559\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"d021c344051af91f42c5ba9fdedc176740cbd238\", \"lessThan\": \"eeca93f06df89be5a36305b7b9dae1ed65550dfc\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"d021c344051af91f42c5ba9fdedc176740cbd238\", \"lessThan\": \"5998da5a8208ae9ad7838ba322bccb2bdcd95e81\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"d021c344051af91f42c5ba9fdedc176740cbd238\", \"lessThan\": \"f1c170cae285e4b8f61be043bb17addc3d0a14b5\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"d021c344051af91f42c5ba9fdedc176740cbd238\", \"lessThan\": \"ab6b19f690d89ae4709fba73a3c4a7911f495b7a\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"d021c344051af91f42c5ba9fdedc176740cbd238\", \"lessThan\": \"002541ef650b742a198e4be363881439bb9d86b4\", \"versionType\": \"git\"}], \"programFiles\": [\"net/vmw_vsock/af_vsock.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"3.9\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"3.9\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.4.302\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.247\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.197\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.159\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.118\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.12.60\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.12.*\"}, {\"status\": \"unaffected\", \"version\": \"6.17.10\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.17.*\"}, {\"status\": \"unaffected\", \"version\": \"6.18\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"net/vmw_vsock/af_vsock.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/3f71753935d648082a8279a97d30efe6b85be680\"}, {\"url\": \"https://git.kernel.org/stable/c/da664101fb4a0de5cb70d2bae6a650df954df2af\"}, {\"url\": \"https://git.kernel.org/stable/c/67432915145848658149683101104e32f9fd6559\"}, {\"url\": \"https://git.kernel.org/stable/c/eeca93f06df89be5a36305b7b9dae1ed65550dfc\"}, {\"url\": \"https://git.kernel.org/stable/c/5998da5a8208ae9ad7838ba322bccb2bdcd95e81\"}, {\"url\": \"https://git.kernel.org/stable/c/f1c170cae285e4b8f61be043bb17addc3d0a14b5\"}, {\"url\": \"https://git.kernel.org/stable/c/ab6b19f690d89ae4709fba73a3c4a7911f495b7a\"}, {\"url\": \"https://git.kernel.org/stable/c/002541ef650b742a198e4be363881439bb9d86b4\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nvsock: Ignore signal/timeout on connect() if already established\\n\\nDuring connect(), acting on a signal/timeout by disconnecting an already\\nestablished socket leads to several issues:\\n\\n1. connect() invoking vsock_transport_cancel_pkt() -\u003e\\n virtio_transport_purge_skbs() may race with sendmsg() invoking\\n virtio_transport_get_credit(). This results in a permanently elevated\\n `vvs-\u003ebytes_unsent`. Which, in turn, confuses the SOCK_LINGER handling.\\n\\n2. connect() resetting a connected socket\u0027s state may race with socket\\n being placed in a sockmap. A disconnected socket remaining in a sockmap\\n breaks sockmap\u0027s assumptions. And gives rise to WARNs.\\n\\n3. connect() transitioning SS_CONNECTED -\u003e SS_UNCONNECTED allows for a\\n transport change/drop after TCP_ESTABLISHED. Which poses a problem for\\n any simultaneous sendmsg() or connect() and may result in a\\n use-after-free/null-ptr-deref.\\n\\nDo not disconnect socket on signal/timeout. Keep the logic for unconnected\\nsockets: they don\u0027t linger, can\u0027t be placed in a sockmap, are rejected by\\nsendmsg().\\n\\n[1]: https://lore.kernel.org/netdev/e07fd95c-9a38-4eea-9638-133e38c2ec9b@rbox.co/\\n[2]: https://lore.kernel.org/netdev/20250317-vsock-trans-signal-race-v4-0-fc8837f3f1d4@rbox.co/\\n[3]: https://lore.kernel.org/netdev/60f1b7db-3099-4f6a-875e-af9f6ef194f6@rbox.co/\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.302\", \"versionStartIncluding\": \"3.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.247\", \"versionStartIncluding\": \"3.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.197\", \"versionStartIncluding\": \"3.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.159\", \"versionStartIncluding\": \"3.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.118\", \"versionStartIncluding\": \"3.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12.60\", \"versionStartIncluding\": \"3.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.17.10\", \"versionStartIncluding\": \"3.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.18\", \"versionStartIncluding\": \"3.9\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-05-11T21:45:39.557Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2025-40248\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-06-16T20:01:18.965Z\", \"dateReserved\": \"2025-04-16T07:20:57.181Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-12-04T16:08:11.509Z\", \"assignerShortName\": \"Linux\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Loading…
The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Loading…
Loading…