270 lines
14 KiB
JSON
270 lines
14 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2024-53186",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2024-11-19T17:17:25.012Z",
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"datePublished": "2024-12-27T13:49:29.215Z",
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"dateUpdated": "2026-08-05T11:44:29.475Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T11:44:29.475Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: fix use-after-free in SMB request handling\n\nA race condition exists between SMB request handling in\n`ksmbd_conn_handler_loop()` and the freeing of `ksmbd_conn` in the\nworkqueue handler `handle_ksmbd_work()`. This leads to a UAF.\n- KASAN: slab-use-after-free Read in handle_ksmbd_work\n- KASAN: slab-use-after-free in rtlock_slowlock_locked\n\nThis race condition arises as follows:\n- `ksmbd_conn_handler_loop()` waits for `conn->r_count` to reach zero:\n `wait_event(conn->r_count_q, atomic_read(&conn->r_count) == 0);`\n- Meanwhile, `handle_ksmbd_work()` decrements `conn->r_count` using\n `atomic_dec_return(&conn->r_count)`, and if it reaches zero, calls\n `ksmbd_conn_free()`, which frees `conn`.\n- However, after `handle_ksmbd_work()` decrements `conn->r_count`,\n it may still access `conn->r_count_q` in the following line:\n `waitqueue_active(&conn->r_count_q)` or `wake_up(&conn->r_count_q)`\n This results in a UAF, as `conn` has already been freed.\n\nThe discovery of this UAF can be referenced in the following PR for\nsyzkaller's support for SMB requests."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 9.8,
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"baseSeverity": "CRITICAL"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:N - ksmbd is the in-kernel SMB server listening on TCP/445; the vulnerable work-completion path is driven entirely by PDUs received from a remote peer and by remote connection teardown. No local access is needed.\nAC:L - The attacker controls both sides of the race — queuing SMB work items (raising conn->r_count) and abruptly closing the TCP connection to drive ksmbd_conn_handler_loop into wait_event/free — and can retry indefinitely across many parallel connections; syzkaller reproduced it without targeting.\nPR:N - queue_ksmbd_work()/handle_ksmbd_work() run for every received PDU including the very first SMB2 NEGOTIATE, before session setup or any credential validation, so an unauthenticated remote attacker reaches the bug.\nUI:N - Exploitation requires only that the attacker open connections and send/close them; no action by any local user or administrator is involved.\nS:U - The use-after-free corrupts kernel heap memory within the same kernel security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The freed ksmbd_conn is a sprayable general-cache allocation, and the UAF read of conn->r_count_q plus the list walk in wake_up() over reclaimed memory can be leveraged into kernel memory disclosure and, via the resulting control primitive, arbitrary read.\nI:H - wake_up() on the freed waitqueue writes to freed memory (spinlock acquisition and list_del in the wake function) and performs an indirect call through curr->func taken from reclaimed, attacker-sprayable memory, giving a control-flow hijack / arbitrary write primitive.\nA:H - Even without successful exploitation, the use-after-free reliably produces slab corruption, KASAN splats, and kernel oops/panic in handle_ksmbd_work or the RT lock slowpath, and can be triggered repeatedly by an unauthenticated remote peer."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"fs/smb/server/server.c"
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],
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"versions": [
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{
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"version": "18f06bacc197d4ac9b518ad1c69999bc3d83e7aa",
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"lessThan": "a96f9eb7add30ba0fafcfe7b7aca090978196800",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "e9dac92f4482a382e8c0fe1bc243da5fc3526b0c",
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"lessThan": "f20b77f7897e6aab9ce5527e6016ad2be5d70a33",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "ee426bfb9d09b29987369b897fe9b6485ac2be27",
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"lessThan": "96261adb998a3b513468b6ce17dbec76be5507d4",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "ee426bfb9d09b29987369b897fe9b6485ac2be27",
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"lessThan": "9a8c5d89d327ff58e9b2517f8a6afb4181d32c6e",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "9fd3cde4628bcd3549ab95061f2bab74d2ed4f3b",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "6.6.55",
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"lessThan": "6.6.64",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "6.11.3",
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"lessThan": "6.11.11",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "6.10.14",
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"lessThan": "6.11",
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"status": "affected",
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"versionType": "semver"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"fs/smb/server/server.c"
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],
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"versions": [
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{
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"version": "6.12",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "6.12",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.64",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.11.11",
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"lessThanOrEqual": "6.11.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12.2",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.13",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.6.55",
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"versionEndExcluding": "6.6.64"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.11.3",
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"versionEndExcluding": "6.11.11"
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},
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.12",
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{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.12",
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"versionEndExcluding": "6.13"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/a96f9eb7add30ba0fafcfe7b7aca090978196800"
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},
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{
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"url": "https://git.kernel.org/stable/c/f20b77f7897e6aab9ce5527e6016ad2be5d70a33"
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},
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{
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"url": "https://git.kernel.org/stable/c/96261adb998a3b513468b6ce17dbec76be5507d4"
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},
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{
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"url": "https://git.kernel.org/stable/c/9a8c5d89d327ff58e9b2517f8a6afb4181d32c6e"
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}
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],
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"title": "ksmbd: fix use-after-free in SMB request handling",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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},
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"adp": [
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{
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"metrics": [
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{
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"cvssV3_1": {
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"scope": "UNCHANGED",
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"version": "3.1",
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"baseScore": 7.8,
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"attackVector": "LOCAL",
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"baseSeverity": "HIGH",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"integrityImpact": "HIGH",
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"userInteraction": "NONE",
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"attackComplexity": "LOW",
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"availabilityImpact": "HIGH",
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"privilegesRequired": "LOW",
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"confidentialityImpact": "HIGH"
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}
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},
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{
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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2024-53186",
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "total"
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}
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],
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"version": "2.0.3",
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"timestamp": "2025-02-10T17:13:00.740506Z"
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}
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}
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}
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],
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"problemTypes": [
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{
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"descriptions": [
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{
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"lang": "en",
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"type": "CWE",
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"cweId": "CWE-416",
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"description": "CWE-416 Use After Free"
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}
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]
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2025-02-10T17:21:09.067Z"
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}
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}
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]
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}
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} |