180 lines
9.7 KiB
JSON
180 lines
9.7 KiB
JSON
{
|
|
"dataType": "CVE_RECORD",
|
|
"dataVersion": "5.2",
|
|
"cveMetadata": {
|
|
"cveId": "CVE-2026-53389",
|
|
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
|
|
"state": "PUBLISHED",
|
|
"assignerShortName": "Linux",
|
|
"dateReserved": "2026-06-09T07:44:35.402Z",
|
|
"datePublished": "2026-07-19T12:01:54.386Z",
|
|
"dateUpdated": "2026-08-17T04:50:40.399Z"
|
|
},
|
|
"containers": {
|
|
"cna": {
|
|
"providerMetadata": {
|
|
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
|
|
"shortName": "Linux",
|
|
"dateUpdated": "2026-08-17T04:50:40.399Z"
|
|
},
|
|
"descriptions": [
|
|
{
|
|
"lang": "en",
|
|
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/tcp-ao: fix use-after-free of key in del_async path\n\nIn tcp_ao_delete_key(), the del_async path skips the current_key\nand rnext_key validity checks present in the synchronous path,\nassuming these pointers are always NULL on LISTEN sockets. However,\nif a key was added with set_current=1/set_rnext=1 while the socket\nwas in CLOSE state, current_key and rnext_key will be non-NULL\nafter listen() transitions the socket to LISTEN.\n\nWhen such a key is deleted with del_async=1, hlist_del_rcu() and\ncall_rcu() free the key without clearing the dangling pointers.\nAfter the RCU grace period, getsockopt(TCP_AO_INFO) dereferences\ncurrent_key->sndid and rnext_key->rcvid from freed slab memory.\n\nClear current_key and rnext_key in the del_async path when they\nreference the key being deleted."
|
|
}
|
|
],
|
|
"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 - Exploitation requires local `setsockopt`/`getsockopt` syscalls on a TCP socket owned by the attacker; the UAF is triggered in socket-option management, not by remote TCP-AO packet processing on the listen path.\nAC:L - An attacker who controls the socket can deterministically perform add-with-set_current/set_rnext on CLOSE, listen(), del_async delete, wait for RCU, then getsockopt(TCP_AO_INFO) without depending on conditions outside their control.\nPR:L - No capability checks protect TCP-AO socket options beyond socket ownership; an unprivileged local user (including in a user namespace) can create a listening TCP socket, configure TCP-AO keys, and trigger the bug on their own socket.\nUI:N - No victim interaction is required; the attacker drives the full exploit sequence through their own socket file descriptor.\nS:U - Impact is confined to kernel memory corruption and privilege escalation within the same security domain; this is not a cross-VM, cross-container, or IOMMU boundary escape.\nC:H - The bug is a use-after-free where `getsockopt(TCP_AO_INFO)` reads `sndid`/`rcvid` from freed `tcp_ao_key` slab memory, enabling information disclosure from attacker-influenced freed heap contents.\nI:H - Use-after-free of a heap-allocated `tcp_ao_key` structure can be leveraged with heap grooming for arbitrary memory corruption and potential kernel code execution, not merely a bounded write.\nA:H - Dereferencing freed kernel memory via `getsockopt(TCP_AO_INFO)` can cause kernel oops/panic and denial of service even when full exploitation is not attempted."
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"affected": [
|
|
{
|
|
"product": "Linux",
|
|
"vendor": "Linux",
|
|
"defaultStatus": "unaffected",
|
|
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
|
|
"programFiles": [
|
|
"net/ipv4/tcp_ao.c"
|
|
],
|
|
"versions": [
|
|
{
|
|
"version": "d6732b95b6fbbc6d5bb9d2f809e275763640c4a2",
|
|
"lessThan": "6ce7ef41743740ce15c2061561b784148b565b3f",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "d6732b95b6fbbc6d5bb9d2f809e275763640c4a2",
|
|
"lessThan": "e77fbefd1269b5c123e7c651a1ebdce1b87d19a0",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "d6732b95b6fbbc6d5bb9d2f809e275763640c4a2",
|
|
"lessThan": "7ddc29a094d96e9b3aa280433c6dc443df9eabf2",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "d6732b95b6fbbc6d5bb9d2f809e275763640c4a2",
|
|
"lessThan": "5ba9950bc9078e19b69cca1e56d1553b125c6857",
|
|
"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/tcp_ao.c"
|
|
],
|
|
"versions": [
|
|
{
|
|
"version": "6.7",
|
|
"status": "affected"
|
|
},
|
|
{
|
|
"version": "0",
|
|
"lessThan": "6.7",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.12.95",
|
|
"lessThanOrEqual": "6.12.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.18.38",
|
|
"lessThanOrEqual": "6.18.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "7.1.3",
|
|
"lessThanOrEqual": "7.1.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "7.2",
|
|
"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": "6.7",
|
|
"versionEndExcluding": "6.12.95"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "6.7",
|
|
"versionEndExcluding": "6.18.38"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "6.7",
|
|
"versionEndExcluding": "7.1.3"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "6.7",
|
|
"versionEndExcluding": "7.2"
|
|
}
|
|
]
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"references": [
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/6ce7ef41743740ce15c2061561b784148b565b3f"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/e77fbefd1269b5c123e7c651a1ebdce1b87d19a0"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/7ddc29a094d96e9b3aa280433c6dc443df9eabf2"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/5ba9950bc9078e19b69cca1e56d1553b125c6857"
|
|
}
|
|
],
|
|
"title": "net/tcp-ao: fix use-after-free of key in del_async path",
|
|
"x_generator": {
|
|
"engine": "bippy-1.2.0"
|
|
}
|
|
}
|
|
}
|
|
} |