{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2025-38728", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T04:51:24.033Z", "datePublished": "2025-09-04T15:33:26.039Z", "dateUpdated": "2026-08-05T12:04:19.517Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:04:19.517Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb3: fix for slab out of bounds on mount to ksmbd\n\nWith KASAN enabled, it is possible to get a slab out of bounds\nduring mount to ksmbd due to missing check in parse_server_interfaces()\n(see below):\n\n BUG: KASAN: slab-out-of-bounds in\n parse_server_interfaces+0x14ee/0x1880 [cifs]\n Read of size 4 at addr ffff8881433dba98 by task mount/9827\n\n CPU: 5 UID: 0 PID: 9827 Comm: mount Tainted: G\n OE 6.16.0-rc2-kasan #2 PREEMPT(voluntary)\n Tainted: [O]=OOT_MODULE, [E]=UNSIGNED_MODULE\n Hardware name: Dell Inc. Precision Tower 3620/0MWYPT,\n BIOS 2.13.1 06/14/2019\n Call Trace:\n \n dump_stack_lvl+0x9f/0xf0\n print_report+0xd1/0x670\n __virt_addr_valid+0x22c/0x430\n ? parse_server_interfaces+0x14ee/0x1880 [cifs]\n ? kasan_complete_mode_report_info+0x2a/0x1f0\n ? parse_server_interfaces+0x14ee/0x1880 [cifs]\n kasan_report+0xd6/0x110\n parse_server_interfaces+0x14ee/0x1880 [cifs]\n __asan_report_load_n_noabort+0x13/0x20\n parse_server_interfaces+0x14ee/0x1880 [cifs]\n ? __pfx_parse_server_interfaces+0x10/0x10 [cifs]\n ? trace_hardirqs_on+0x51/0x60\n SMB3_request_interfaces+0x1ad/0x3f0 [cifs]\n ? __pfx_SMB3_request_interfaces+0x10/0x10 [cifs]\n ? SMB2_tcon+0x23c/0x15d0 [cifs]\n smb3_qfs_tcon+0x173/0x2b0 [cifs]\n ? __pfx_smb3_qfs_tcon+0x10/0x10 [cifs]\n ? cifs_get_tcon+0x105d/0x2120 [cifs]\n ? do_raw_spin_unlock+0x5d/0x200\n ? cifs_get_tcon+0x105d/0x2120 [cifs]\n ? __pfx_smb3_qfs_tcon+0x10/0x10 [cifs]\n cifs_mount_get_tcon+0x369/0xb90 [cifs]\n ? dfs_cache_find+0xe7/0x150 [cifs]\n dfs_mount_share+0x985/0x2970 [cifs]\n ? check_path.constprop.0+0x28/0x50\n ? save_trace+0x54/0x370\n ? __pfx_dfs_mount_share+0x10/0x10 [cifs]\n ? __lock_acquire+0xb82/0x2ba0\n ? __kasan_check_write+0x18/0x20\n cifs_mount+0xbc/0x9e0 [cifs]\n ? __pfx_cifs_mount+0x10/0x10 [cifs]\n ? do_raw_spin_unlock+0x5d/0x200\n ? cifs_setup_cifs_sb+0x29d/0x810 [cifs]\n cifs_smb3_do_mount+0x263/0x1990 [cifs]" } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H", "baseScore": 9.1, "baseSeverity": "CRITICAL" }, "scenarios": [ { "lang": "en", "value": "AV:N - The out-of-bounds offset is the `Next` field of an SMB2 FSCTL_QUERY_NETWORK_INTERFACE_INFO response received over TCP/445 from a remote SMB server, parsed by the in-kernel cifs client. A malicious or compromised SMB server (or MITM on an unsigned session) triggers it purely with network data.\nAC:L - The server directly controls the 32-bit `Next` value and the response length, so it deterministically drives `p` past the end of the kmemdup'd buffer on the first entry; no race, timing, or memory-layout condition outside the attacker's control is involved.\nPR:N - The attacker is the peer SMB server, which holds no privileges on the victim client — it is the client that authenticates to the server, not the reverse. No credentials or local account on the target are needed.\nUI:N - Besides the mount path, `SMB3_request_interfaces()` is invoked from the `smb2_query_server_interfaces()` delayed work re-queued every 600 s and from `smb2_reconnect()`; since the server itself advertises the MULTI_CHANNEL capability that schedules that poll and can force a reconnect by dropping the connection, it can trigger the parse repeatedly on a pre-existing mount with no victim action.\nS:U - The invalid read and its consequences stay within the kernel of the affected client host; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The server chooses an arbitrary offset of up to 4 GiB past the response allocation, giving an unbounded wild read of kernel memory rather than a small bounded overread, consistent with kernel.org CNA treatment of cifs client OOB reads (e.g. CVE-2026-31613, CVE-2026-46155).\nI:N - The defect is strictly a read: `bytes_left` goes negative and the loop exits before any out-of-bounds bytes are copied into `tmp_iface` or the interface list, and there is no out-of-bounds write.\nA:H - Dereferencing a pointer up to 4 GiB beyond a slab object readily hits an unmapped direct-map address, producing a kernel oops that kills the mounting or cifsiod worker context (and a KASAN report/panic on hardened kernels); the server can repeat it on every reconnect." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "fs/smb/client/smb2ops.c" ], "versions": [ { "version": "fe856be475f7cf5ffcde57341d175ce9fd09434b", "lessThan": "9bdb8e98a0073c73ab3e6c631ec78877ceb64565", "status": "affected", "versionType": "git" }, { "version": "fe856be475f7cf5ffcde57341d175ce9fd09434b", "lessThan": "a0620e1525663edd8c4594f49fb75fe5be4724b0", "status": "affected", "versionType": "git" }, { "version": "fe856be475f7cf5ffcde57341d175ce9fd09434b", "lessThan": "8de33d4d72e8fae3502ec3850bd7b14e7c7328b6", "status": "affected", "versionType": "git" }, { "version": "fe856be475f7cf5ffcde57341d175ce9fd09434b", "lessThan": "a542f93a123555d09c3ce8bc947f7b56ad8e6463", "status": "affected", "versionType": "git" }, { "version": "fe856be475f7cf5ffcde57341d175ce9fd09434b", "lessThan": "f6eda5b0e8f8123564c5b34f5801d63243032eac", "status": "affected", "versionType": "git" }, { "version": "fe856be475f7cf5ffcde57341d175ce9fd09434b", "lessThan": "7d34ec36abb84fdfb6632a0f2cbda90379ae21fc", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "fs/smb/client/smb2ops.c" ], "versions": [ { "version": "4.18", "status": "affected" }, { "version": "0", "lessThan": "4.18", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.149", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.103", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.43", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.15.11", "lessThanOrEqual": "6.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.16.2", "lessThanOrEqual": "6.16.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.17", "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": "6.1.149" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.18", "versionEndExcluding": "6.6.103" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.18", "versionEndExcluding": "6.12.43" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.18", "versionEndExcluding": "6.15.11" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.18", "versionEndExcluding": "6.16.2" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.18", "versionEndExcluding": "6.17" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/9bdb8e98a0073c73ab3e6c631ec78877ceb64565" }, { "url": "https://git.kernel.org/stable/c/a0620e1525663edd8c4594f49fb75fe5be4724b0" }, { "url": "https://git.kernel.org/stable/c/8de33d4d72e8fae3502ec3850bd7b14e7c7328b6" }, { "url": "https://git.kernel.org/stable/c/a542f93a123555d09c3ce8bc947f7b56ad8e6463" }, { "url": "https://git.kernel.org/stable/c/f6eda5b0e8f8123564c5b34f5801d63243032eac" }, { "url": "https://git.kernel.org/stable/c/7d34ec36abb84fdfb6632a0f2cbda90379ae21fc" } ], "title": "smb3: fix for slab out of bounds on mount to ksmbd", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "title": "CVE Program Container", "references": [ { "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html" } ], "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T17:41:57.246Z" } }, { "x_adpType": "supplier", "providerMetadata": { "orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "shortName": "siemens-SADP", "dateUpdated": "2026-05-12T12:05:57.850Z" }, "affected": [ { "vendor": "Siemens", "product": "SIMATIC CN 4100", "versions": [ { "status": "affected", "version": "0", "lessThan": "V5.0", "versionType": "custom" } ], "defaultStatus": "unknown" } ], "references": [ { "url": "https://cert-portal.siemens.com/productcert/html/ssa-032379.html" } ] } ] } }