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vuln-cve/data/2025/68xxx/CVE-2025-68285.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2025-68285",
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"state": "PUBLISHED",
"assignerShortName": "Linux",
"dateReserved": "2025-12-16T14:48:05.292Z",
"datePublished": "2025-12-16T15:06:07.078Z",
"dateUpdated": "2026-08-05T12:10:39.092Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux",
"dateUpdated": "2026-08-05T12:10:39.092Z"
},
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nlibceph: fix potential use-after-free in have_mon_and_osd_map()\n\nThe wait loop in __ceph_open_session() can race with the client\nreceiving a new monmap or osdmap shortly after the initial map is\nreceived. Both ceph_monc_handle_map() and handle_one_map() install\na new map immediately after freeing the old one\n\n kfree(monc->monmap);\n monc->monmap = monmap;\n\n ceph_osdmap_destroy(osdc->osdmap);\n osdc->osdmap = newmap;\n\nunder client->monc.mutex and client->osdc.lock respectively, but\nbecause neither is taken in have_mon_and_osd_map() it's possible for\nclient->monc.monmap->epoch and client->osdc.osdmap->epoch arms in\n\n client->monc.monmap && client->monc.monmap->epoch &&\n client->osdc.osdmap && client->osdc.osdmap->epoch;\n\ncondition to dereference an already freed map. This happens to be\nreproducible with generic/395 and generic/397 with KASAN enabled:\n\n BUG: KASAN: slab-use-after-free in have_mon_and_osd_map+0x56/0x70\n Read of size 4 at addr ffff88811012d810 by task mount.ceph/13305\n CPU: 2 UID: 0 PID: 13305 Comm: mount.ceph Not tainted 6.14.0-rc2-build2+ #1266\n ...\n Call Trace:\n <TASK>\n have_mon_and_osd_map+0x56/0x70\n ceph_open_session+0x182/0x290\n ceph_get_tree+0x333/0x680\n vfs_get_tree+0x49/0x180\n do_new_mount+0x1a3/0x2d0\n path_mount+0x6dd/0x730\n do_mount+0x99/0xe0\n __do_sys_mount+0x141/0x180\n do_syscall_64+0x9f/0x100\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\n </TASK>\n\n Allocated by task 13305:\n ceph_osdmap_alloc+0x16/0x130\n ceph_osdc_init+0x27a/0x4c0\n ceph_create_client+0x153/0x190\n create_fs_client+0x50/0x2a0\n ceph_get_tree+0xff/0x680\n vfs_get_tree+0x49/0x180\n do_new_mount+0x1a3/0x2d0\n path_mount+0x6dd/0x730\n do_mount+0x99/0xe0\n __do_sys_mount+0x141/0x180\n do_syscall_64+0x9f/0x100\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\n\n Freed by task 9475:\n kfree+0x212/0x290\n handle_one_map+0x23c/0x3b0\n ceph_osdc_handle_map+0x3c9/0x590\n mon_dispatch+0x655/0x6f0\n ceph_con_process_message+0xc3/0xe0\n ceph_con_v1_try_read+0x614/0x760\n ceph_con_workfn+0x2de/0x650\n process_one_work+0x486/0x7c0\n process_scheduled_works+0x73/0x90\n worker_thread+0x1c8/0x2a0\n kthread+0x2ec/0x300\n ret_from_fork+0x24/0x40\n ret_from_fork_asm+0x1a/0x30\n\nRewrite the wait loop to check the above condition directly with\nclient->monc.mutex and client->osdc.lock taken as appropriate. While\nat it, improve the timeout handling (previously mount_timeout could be\nexceeded in case wait_event_interruptible_timeout() slept more than\nonce) and access client->auth_err under client->monc.mutex to match\nhow it's set in finish_auth().\n\nmonmap_show() and osdmap_show() now take the respective lock before\naccessing the map as well."
}
],
"metrics": [
{
"cvssV3_1": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"baseScore": 9.8,
"baseSeverity": "CRITICAL"
},
"scenarios": [
{
"lang": "en",
"value": "AV:N - The race is driven by MON_MAP and OSD_MAP messages received over TCP from a remote Ceph monitor during session establishment.\nAC:L - A malicious monitor can send repeated, closely spaced map updates and wake the mount thread, making the race attacker-amplifiable and reproducible.\nPR:N - Legacy messenger-v1 dispatches monitor map messages without requiring completed CephX authentication, so the remote attacker needs no target-system privileges.\nUI:N - CephFS and RBD sessions are commonly opened automatically during boot or orchestration, requiring no human action once the client is configured.\nS:U - The vulnerable libceph code and the affected kernel resources belong to the same host security authority.\nC:H - The kernel-heap use-after-free permits attacker-shaped reclamation of the freed map object and is conservatively treated as enabling kernel-memory disclosure.\nI:H - Attacker-controlled heap shaping around a kernel use-after-free may provide memory-corruption or control-flow primitives, warranting high integrity impact.\nA:H - The use-after-free is KASAN-reproducible and can cause a kernel oops or panic, taking the host and its Ceph-backed storage offline."
}
]
}
],
"affected": [
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"net/ceph/ceph_common.c",
"net/ceph/debugfs.c"
],
"versions": [
{
"version": "6822d00b5462e7a9dfa11dcc60cc25823a2107c5",
"lessThan": "bb4910c5fd436701faf367e1b5476a5a6d2aff1c",
"status": "affected",
"versionType": "git"
},
{
"version": "6822d00b5462e7a9dfa11dcc60cc25823a2107c5",
"lessThan": "05ec43e9a9de67132dc8cd3b22afef001574947f",
"status": "affected",
"versionType": "git"
},
{
"version": "6822d00b5462e7a9dfa11dcc60cc25823a2107c5",
"lessThan": "7c8ccdc1714d9fabecd26e1be7db1771061acc6e",
"status": "affected",
"versionType": "git"
},
{
"version": "6822d00b5462e7a9dfa11dcc60cc25823a2107c5",
"lessThan": "183ad6e3b651e8fb0b66d6a2678f4b80bfbba092",
"status": "affected",
"versionType": "git"
},
{
"version": "6822d00b5462e7a9dfa11dcc60cc25823a2107c5",
"lessThan": "e08021b3b56b2407f37b5fe47b654be80cc665fb",
"status": "affected",
"versionType": "git"
},
{
"version": "6822d00b5462e7a9dfa11dcc60cc25823a2107c5",
"lessThan": "3fc43120b22a3d4f1fbeff56a35ce2105b6a5683",
"status": "affected",
"versionType": "git"
},
{
"version": "6822d00b5462e7a9dfa11dcc60cc25823a2107c5",
"lessThan": "076381c261374c587700b3accf410bdd2dba334e",
"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/ceph/ceph_common.c",
"net/ceph/debugfs.c"
],
"versions": [
{
"version": "2.6.35",
"status": "affected"
},
{
"version": "0",
"lessThan": "2.6.35",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.10.247",
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.15.197",
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.1.159",
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.6.119",
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.12.61",
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.17.11",
"lessThanOrEqual": "6.17.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.18",
"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": "2.6.35",
"versionEndExcluding": "5.10.247"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.35",
"versionEndExcluding": "5.15.197"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.35",
"versionEndExcluding": "6.1.159"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.35",
"versionEndExcluding": "6.6.119"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.35",
"versionEndExcluding": "6.12.61"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.35",
"versionEndExcluding": "6.17.11"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.35",
"versionEndExcluding": "6.18"
}
]
}
]
}
],
"references": [
{
"url": "https://git.kernel.org/stable/c/bb4910c5fd436701faf367e1b5476a5a6d2aff1c"
},
{
"url": "https://git.kernel.org/stable/c/05ec43e9a9de67132dc8cd3b22afef001574947f"
},
{
"url": "https://git.kernel.org/stable/c/7c8ccdc1714d9fabecd26e1be7db1771061acc6e"
},
{
"url": "https://git.kernel.org/stable/c/183ad6e3b651e8fb0b66d6a2678f4b80bfbba092"
},
{
"url": "https://git.kernel.org/stable/c/e08021b3b56b2407f37b5fe47b654be80cc665fb"
},
{
"url": "https://git.kernel.org/stable/c/3fc43120b22a3d4f1fbeff56a35ce2105b6a5683"
},
{
"url": "https://git.kernel.org/stable/c/076381c261374c587700b3accf410bdd2dba334e"
}
],
"title": "libceph: fix potential use-after-free in have_mon_and_osd_map()",
"x_generator": {
"engine": "bippy-1.2.0"
}
},
"adp": [
{
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-06-16T19:31:19.838662Z",
"id": "CVE-2025-68285",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-06-16T19:31:34.116Z"
}
}
]
}
}
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