430 lines
22 KiB
JSON
430 lines
22 KiB
JSON
{
|
|
"dataType": "CVE_RECORD",
|
|
"dataVersion": "5.2",
|
|
"cveMetadata": {
|
|
"cveId": "CVE-2025-21926",
|
|
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
|
|
"state": "PUBLISHED",
|
|
"assignerShortName": "Linux",
|
|
"dateReserved": "2024-12-29T08:45:45.788Z",
|
|
"datePublished": "2025-04-01T15:40:57.882Z",
|
|
"dateUpdated": "2026-11-10T12:35:32.202Z"
|
|
},
|
|
"containers": {
|
|
"cna": {
|
|
"providerMetadata": {
|
|
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
|
|
"shortName": "Linux",
|
|
"dateUpdated": "2026-08-05T11:55:23.999Z"
|
|
},
|
|
"descriptions": [
|
|
{
|
|
"lang": "en",
|
|
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: gso: fix ownership in __udp_gso_segment\n\nIn __udp_gso_segment the skb destructor is removed before segmenting the\nskb but the socket reference is kept as-is. This is an issue if the\noriginal skb is later orphaned as we can hit the following bug:\n\n kernel BUG at ./include/linux/skbuff.h:3312! (skb_orphan)\n RIP: 0010:ip_rcv_core+0x8b2/0xca0\n Call Trace:\n ip_rcv+0xab/0x6e0\n __netif_receive_skb_one_core+0x168/0x1b0\n process_backlog+0x384/0x1100\n __napi_poll.constprop.0+0xa1/0x370\n net_rx_action+0x925/0xe50\n\nThe above can happen following a sequence of events when using\nOpenVSwitch, when an OVS_ACTION_ATTR_USERSPACE action precedes an\nOVS_ACTION_ATTR_OUTPUT action:\n\n1. OVS_ACTION_ATTR_USERSPACE is handled (in do_execute_actions): the skb\n goes through queue_gso_packets and then __udp_gso_segment, where its\n destructor is removed.\n2. The segments' data are copied and sent to userspace.\n3. OVS_ACTION_ATTR_OUTPUT is handled (in do_execute_actions) and the\n same original skb is sent to its path.\n4. If it later hits skb_orphan, we hit the bug.\n\nFix this by also removing the reference to the socket in\n__udp_gso_segment."
|
|
}
|
|
],
|
|
"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 only fires on a locally originated UDP GSO skb that still carries a socket owner (`copy_dtor` requires `destructor == sock_wfree`); forwarded/remote packets are already orphaned with `sk == NULL`. The attacker must therefore have a local account to open the UDP socket and to program the OVS datapath.\nAC:L - The trigger is fully deterministic — install a flow whose actions are userspace-then-output, then `sendmsg()` one `UDP_SEGMENT` packet larger than gso_size, and `BUG_ON(skb->sk)` fires every time with no race to win or memory layout to guess. The socket-free window for the use-after-free variant is likewise attacker-controlled on both sides (send, then `close()` while the skb is still queued).\nPR:L - An unprivileged user suffices: every OVS generic-netlink op uses GENL_UNS_ADMIN_PERM with `.netnsok = true`, so `unshare -Urn` grants the required CAP_NET_ADMIN in the new user/net namespace, and `ctrl_getfamily()` autoloads openvswitch.ko with no capability check. On real OVN/OpenStack hosts no attacker setup is needed at all, since sFlow/IPFIX sampling and controller-style rules already emit userspace+output action lists.\nUI:N - The attacker performs the entire sequence — datapath and flow setup, then a single sendmsg — from its own process. No administrator or victim action is involved.\nS:U - The corruption and the crash both occur inside the kernel's own security authority; no hypervisor, IOMMU, or sandbox boundary is crossed. This is standard in-kernel impact, so scope is unchanged.\nC:H - The retained skb keeps a `struct sock *` for which the wmem charge was handed to the segments, so once the socket is closed and freed the dangling pointer is dereferenced on the output path — `fq_classify()` reads `sk->sk_state`/`sk->sk_hash` and caches the freed pointer in its flow rbtree, and `netdev_core_pick_tx`/`skb_update_prio`/AF_PACKET taps read it too. A use-after-free on a sprayable slab object gives an attacker-observable read of reclaimed kernel memory.\nI:H - The same dangling `sk` is written through, not just read: `fq_classify()` does `smp_store_release(&sk->sk_pacing_status, SK_PACING_FQ)` and updates `f->socket_hash` from freed memory, so a heap-sprayed replacement object is modified at a known offset. Per the UAF guidance this is an exploitable write primitive against kernel state.\nA:H - `skb_orphan()` in `ip_rcv_core()` hits `BUG_ON(skb->sk)` from `process_backlog`/`net_rx_action` — a BUG in softirq context is a fatal exception in interrupt, i.e. an immediate kernel panic, exactly as shown in the commit's trace. It is repeatable at will with a single packet per attempt."
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"affected": [
|
|
{
|
|
"product": "Linux",
|
|
"vendor": "Linux",
|
|
"defaultStatus": "unaffected",
|
|
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
|
|
"programFiles": [
|
|
"net/ipv4/udp_offload.c"
|
|
],
|
|
"versions": [
|
|
{
|
|
"version": "ad405857b174ed31a97982bb129c320d03321cf5",
|
|
"lessThan": "9f28205ddb76e86cac418332e952241d85fed0dc",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "ad405857b174ed31a97982bb129c320d03321cf5",
|
|
"lessThan": "a2d1cca955ed34873e524cc2e6e885450d262f05",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "ad405857b174ed31a97982bb129c320d03321cf5",
|
|
"lessThan": "455217ac9db0cf9349b3933664355e907bb1a569",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "ad405857b174ed31a97982bb129c320d03321cf5",
|
|
"lessThan": "e8db70537878e1bb3fd83e5abcc6feefc0587828",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "ad405857b174ed31a97982bb129c320d03321cf5",
|
|
"lessThan": "01a83237644d6822bc7df2c5564fc81b0df84358",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "ad405857b174ed31a97982bb129c320d03321cf5",
|
|
"lessThan": "084819b0d8b1bd433b90142371eb9450d657f8ca",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "ad405857b174ed31a97982bb129c320d03321cf5",
|
|
"lessThan": "c32da44cc9298eaa6109e3fc2c2b4e07cc4bf11b",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "ad405857b174ed31a97982bb129c320d03321cf5",
|
|
"lessThan": "ee01b2f2d7d0010787c2343463965bbc283a497f",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
}
|
|
]
|
|
},
|
|
{
|
|
"product": "Linux",
|
|
"vendor": "Linux",
|
|
"defaultStatus": "affected",
|
|
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
|
|
"programFiles": [
|
|
"net/ipv4/udp_offload.c"
|
|
],
|
|
"versions": [
|
|
{
|
|
"version": "4.18",
|
|
"status": "affected"
|
|
},
|
|
{
|
|
"version": "0",
|
|
"lessThan": "4.18",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "5.4.291",
|
|
"lessThanOrEqual": "5.4.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "5.10.235",
|
|
"lessThanOrEqual": "5.10.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "5.15.179",
|
|
"lessThanOrEqual": "5.15.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.1.131",
|
|
"lessThanOrEqual": "6.1.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.6.83",
|
|
"lessThanOrEqual": "6.6.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.12.19",
|
|
"lessThanOrEqual": "6.12.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.13.7",
|
|
"lessThanOrEqual": "6.13.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.14",
|
|
"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": "4.18",
|
|
"versionEndExcluding": "5.4.291"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "4.18",
|
|
"versionEndExcluding": "5.10.235"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "4.18",
|
|
"versionEndExcluding": "5.15.179"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "4.18",
|
|
"versionEndExcluding": "6.1.131"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "4.18",
|
|
"versionEndExcluding": "6.6.83"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "4.18",
|
|
"versionEndExcluding": "6.12.19"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "4.18",
|
|
"versionEndExcluding": "6.13.7"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "4.18",
|
|
"versionEndExcluding": "6.14"
|
|
}
|
|
]
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"references": [
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/9f28205ddb76e86cac418332e952241d85fed0dc"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/a2d1cca955ed34873e524cc2e6e885450d262f05"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/455217ac9db0cf9349b3933664355e907bb1a569"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/e8db70537878e1bb3fd83e5abcc6feefc0587828"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/01a83237644d6822bc7df2c5564fc81b0df84358"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/084819b0d8b1bd433b90142371eb9450d657f8ca"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/c32da44cc9298eaa6109e3fc2c2b4e07cc4bf11b"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/ee01b2f2d7d0010787c2343463965bbc283a497f"
|
|
}
|
|
],
|
|
"title": "net: gso: fix ownership in __udp_gso_segment",
|
|
"x_generator": {
|
|
"engine": "bippy-1.2.0"
|
|
}
|
|
},
|
|
"adp": [
|
|
{
|
|
"title": "CVE Program Container",
|
|
"references": [
|
|
{
|
|
"url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html"
|
|
},
|
|
{
|
|
"url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html"
|
|
}
|
|
],
|
|
"providerMetadata": {
|
|
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
|
|
"shortName": "CVE",
|
|
"dateUpdated": "2025-11-03T19:39:23.706Z"
|
|
}
|
|
},
|
|
{
|
|
"x_adpType": "supplier",
|
|
"providerMetadata": {
|
|
"orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e",
|
|
"shortName": "siemens-SADP",
|
|
"dateUpdated": "2026-11-10T12:35:32.202Z"
|
|
},
|
|
"affected": [
|
|
{
|
|
"vendor": "Siemens",
|
|
"product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0)",
|
|
"versions": [
|
|
{
|
|
"status": "affected",
|
|
"version": "V3.1.6",
|
|
"lessThan": "*",
|
|
"versionType": "custom"
|
|
}
|
|
],
|
|
"defaultStatus": "unknown"
|
|
},
|
|
{
|
|
"vendor": "Siemens",
|
|
"product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0)",
|
|
"versions": [
|
|
{
|
|
"status": "affected",
|
|
"version": "V3.1.7",
|
|
"lessThan": "*",
|
|
"versionType": "custom"
|
|
}
|
|
],
|
|
"defaultStatus": "unknown"
|
|
},
|
|
{
|
|
"vendor": "Siemens",
|
|
"product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0)",
|
|
"versions": [
|
|
{
|
|
"status": "affected",
|
|
"version": "V3.1.6",
|
|
"lessThan": "*",
|
|
"versionType": "custom"
|
|
}
|
|
],
|
|
"defaultStatus": "unknown"
|
|
},
|
|
{
|
|
"vendor": "Siemens",
|
|
"product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0)",
|
|
"versions": [
|
|
{
|
|
"status": "affected",
|
|
"version": "V3.1.7",
|
|
"lessThan": "*",
|
|
"versionType": "custom"
|
|
}
|
|
],
|
|
"defaultStatus": "unknown"
|
|
},
|
|
{
|
|
"vendor": "Siemens",
|
|
"product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0)",
|
|
"versions": [
|
|
{
|
|
"status": "affected",
|
|
"version": "V3.1.6",
|
|
"lessThan": "*",
|
|
"versionType": "custom"
|
|
}
|
|
],
|
|
"defaultStatus": "unknown"
|
|
},
|
|
{
|
|
"vendor": "Siemens",
|
|
"product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0)",
|
|
"versions": [
|
|
{
|
|
"status": "affected",
|
|
"version": "V3.1.7",
|
|
"lessThan": "*",
|
|
"versionType": "custom"
|
|
}
|
|
],
|
|
"defaultStatus": "unknown"
|
|
},
|
|
{
|
|
"vendor": "Siemens",
|
|
"product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0)",
|
|
"versions": [
|
|
{
|
|
"status": "affected",
|
|
"version": "V3.1.6",
|
|
"lessThan": "*",
|
|
"versionType": "custom"
|
|
}
|
|
],
|
|
"defaultStatus": "unknown"
|
|
},
|
|
{
|
|
"vendor": "Siemens",
|
|
"product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0)",
|
|
"versions": [
|
|
{
|
|
"status": "affected",
|
|
"version": "V3.1.7",
|
|
"lessThan": "*",
|
|
"versionType": "custom"
|
|
}
|
|
],
|
|
"defaultStatus": "unknown"
|
|
},
|
|
{
|
|
"vendor": "Siemens",
|
|
"product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0)",
|
|
"versions": [
|
|
{
|
|
"status": "affected",
|
|
"version": "V3.1.6",
|
|
"lessThan": "*",
|
|
"versionType": "custom"
|
|
}
|
|
],
|
|
"defaultStatus": "unknown"
|
|
},
|
|
{
|
|
"vendor": "Siemens",
|
|
"product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0)",
|
|
"versions": [
|
|
{
|
|
"status": "affected",
|
|
"version": "V3.1.7",
|
|
"lessThan": "*",
|
|
"versionType": "custom"
|
|
}
|
|
],
|
|
"defaultStatus": "unknown"
|
|
}
|
|
],
|
|
"references": [
|
|
{
|
|
"url": "https://cert-portal.siemens.com/productcert/html/ssa-019113.html"
|
|
},
|
|
{
|
|
"url": "https://cert-portal.siemens.com/productcert/html/ssa-457936.html"
|
|
}
|
|
]
|
|
}
|
|
]
|
|
}
|
|
} |