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CVE-2025-68263— ksmbd: ipc: fix use-after-free in ipc_msg_send_request

CVSS 9.8 · Critical EPSS 0.38% · P30

Affected Version Matrix 14

VendorProductVersion RangeStatus
LinuxLinux0626e6641f6b467447c81dd7678a69c66f7746cf< de85fb58f9967ba024bb08e0041613d37b57b4d1affected
0626e6641f6b467447c81dd7678a69c66f7746cf< 708a620b471a14466f1f52c90bf3f65ebdb31460affected
0626e6641f6b467447c81dd7678a69c66f7746cf< 5ac763713a1ef8f9a8bda1dbd81f0318d67baa4eaffected
0626e6641f6b467447c81dd7678a69c66f7746cf< 759c8c30cfa8706c518e56f67971b1f0932f4b9baffected
0626e6641f6b467447c81dd7678a69c66f7746cf< 8229c6ca50cea701e25a7ee25f48441b582ec5faaffected
0626e6641f6b467447c81dd7678a69c66f7746cf< 1fab1fa091f5aa97265648b53ea031deedd26235affected
5.15affected
< 5.15unaffected
… +6 more rows
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I. Basic Information for CVE-2025-68263

Vulnerability Information
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Vulnerability Title
ksmbd: ipc: fix use-after-free in ipc_msg_send_request
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ksmbd: ipc: fix use-after-free in ipc_msg_send_request ipc_msg_send_request() waits for a generic netlink reply using an ipc_msg_table_entry on the stack. The generic netlink handler (handle_generic_event()/handle_response()) fills entry->response under ipc_msg_table_lock, but ipc_msg_send_request() used to validate and free entry->response without holding the same lock. Under high concurrency this allows a race where handle_response() is copying data into entry->response while ipc_msg_send_request() has just freed it, leading to a slab-use-after-free reported by KASAN in handle_generic_event(): BUG: KASAN: slab-use-after-free in handle_generic_event+0x3c4/0x5f0 [ksmbd] Write of size 12 at addr ffff888198ee6e20 by task pool/109349 ... Freed by task: kvfree ipc_msg_send_request [ksmbd] ksmbd_rpc_open -> ksmbd_session_rpc_open [ksmbd] Fix by: - Taking ipc_msg_table_lock in ipc_msg_send_request() while validating entry->response, freeing it when invalid, and removing the entry from ipc_msg_table. - Returning the final entry->response pointer to the caller only after the hash entry is removed under the lock. - Returning NULL in the error path, preserving the original API semantics. This makes all accesses to entry->response consistent with handle_response(), which already updates and fills the response buffer under ipc_msg_table_lock, and closes the race that allowed the UAF.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于ksmbd中ipc_msg_send_request存在释放后使用。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

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Affected Products

VendorProductAffected VersionsCPESubscribe
LinuxLinux 0626e6641f6b467447c81dd7678a69c66f7746cf ~ de85fb58f9967ba024bb08e0041613d37b57b4d1 -
LinuxLinux 5.15 -

II. Public POCs for CVE-2025-68263

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III. Intelligence Information for CVE-2025-68263

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Other References for CVE-2025-68263 (4)

Same Patch Batch · Linux · 2025-12-16 · 157 CVEs total

CVE-2025-68259KVM: SVM: Don't skip unrelated instruction if INT3/INTO is replaced
CVE-2025-68250hung_task: fix warnings caused by unaligned lock pointers
CVE-2025-68251erofs: avoid infinite loops due to corrupted subpage compact indexes
CVE-2025-68252misc: fastrpc: Fix dma_buf object leak in fastrpc_map_lookup
CVE-2025-68253mm: don't spin in add_stack_record when gfp flags don't allow
CVE-2025-68254staging: rtl8723bs: fix out-of-bounds read in OnBeacon ESR IE parsing
CVE-2025-68255staging: rtl8723bs: fix stack buffer overflow in OnAssocReq IE parsing
CVE-2025-68256staging: rtl8723bs: fix out-of-bounds read in rtw_get_ie() parser
CVE-2025-68257comedi: check device's attached status in compat ioctls
CVE-2025-68258comedi: multiq3: sanitize config options in multiq3_attach()
CVE-2025-68265nvme: fix admin request_queue lifetime
CVE-2025-68283libceph: replace BUG_ON with bounds check for map->max_osd
CVE-2025-68282usb: gadget: udc: fix use-after-free in usb_gadget_state_work
CVE-2025-68281ASoC: SDCA: bug fix while parsing mipi-sdca-control-cn-list
CVE-2025-68266bfs: Reconstruct file type when loading from disk
CVE-2025-68262crypto: zstd - fix double-free in per-CPU stream cleanup
CVE-2025-68260rust_binder: fix race condition on death_list
CVE-2025-68261ext4: add i_data_sem protection in ext4_destroy_inline_data_nolock()
CVE-2025-68249most: usb: hdm_probe: Fix calling put_device() before device initialization
CVE-2025-68264ext4: refresh inline data size before write operations

Showing top 20 of 157 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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