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CVE-2022-49297— nbd: fix io hung while disconnecting device

AI Predicted 5.5 Difficulty: Moderate EPSS 0.28% · P21

Possible ATT&CK Techniques 1AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 18

VendorProductVersion RangeStatus
LinuxLinux2516ab1543fdd1f9d08385d73cae51f668a9f3dc< 67e403136a0e1a55fef6a05f103a3979a39ad3fdaffected
2516ab1543fdd1f9d08385d73cae51f668a9f3dc< 62d227f67a8c25d5e16f40e5290607f9306d2188affected
2516ab1543fdd1f9d08385d73cae51f668a9f3dc< 69893d6d7f5c10d8306c1b5fc64b71efc91aa6cdaffected
2516ab1543fdd1f9d08385d73cae51f668a9f3dc< f72df77600a43e59b3189e53b47f8685739867d3affected
2516ab1543fdd1f9d08385d73cae51f668a9f3dc< c4ba982bd5084fa659ef518aaf159e4dab02ecdaaffected
2516ab1543fdd1f9d08385d73cae51f668a9f3dc< 54b06dc2a206b4d67349bb56b92d4bd32700b7b1affected
2516ab1543fdd1f9d08385d73cae51f668a9f3dc< 141318e62db87105b0103fccc59c9c5940da248daffected
2516ab1543fdd1f9d08385d73cae51f668a9f3dc< 09dadb5985023e27d4740ebd17e6fea4640110e5affected
… +10 more rows
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I. Basic Information for CVE-2022-49297

Vulnerability Information
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Vulnerability Title
nbd: fix io hung while disconnecting device
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: nbd: fix io hung while disconnecting device In our tests, "qemu-nbd" triggers a io hung: INFO: task qemu-nbd:11445 blocked for more than 368 seconds. Not tainted 5.18.0-rc3-next-20220422-00003-g2176915513ca #884 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:qemu-nbd state:D stack: 0 pid:11445 ppid: 1 flags:0x00000000 Call Trace: <TASK> __schedule+0x480/0x1050 ? _raw_spin_lock_irqsave+0x3e/0xb0 schedule+0x9c/0x1b0 blk_mq_freeze_queue_wait+0x9d/0xf0 ? ipi_rseq+0x70/0x70 blk_mq_freeze_queue+0x2b/0x40 nbd_add_socket+0x6b/0x270 [nbd] nbd_ioctl+0x383/0x510 [nbd] blkdev_ioctl+0x18e/0x3e0 __x64_sys_ioctl+0xac/0x120 do_syscall_64+0x35/0x80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fd8ff706577 RSP: 002b:00007fd8fcdfebf8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000040000000 RCX: 00007fd8ff706577 RDX: 000000000000000d RSI: 000000000000ab00 RDI: 000000000000000f RBP: 000000000000000f R08: 000000000000fbe8 R09: 000055fe497c62b0 R10: 00000002aff20000 R11: 0000000000000246 R12: 000000000000006d R13: 0000000000000000 R14: 00007ffe82dc5e70 R15: 00007fd8fcdff9c0 "qemu-ndb -d" will call ioctl 'NBD_DISCONNECT' first, however, following message was found: block nbd0: Send disconnect failed -32 Which indicate that something is wrong with the server. Then, "qemu-nbd -d" will call ioctl 'NBD_CLEAR_SOCK', however ioctl can't clear requests after commit 2516ab1543fd("nbd: only clear the queue on device teardown"). And in the meantime, request can't complete through timeout because nbd_xmit_timeout() will always return 'BLK_EH_RESET_TIMER', which means such request will never be completed in this situation. Now that the flag 'NBD_CMD_INFLIGHT' can make sure requests won't complete multiple times, switch back to call nbd_clear_sock() in nbd_clear_sock_ioctl(), so that inflight requests can be cleared.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
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nbd设备断开连接时可能导致IO挂起。
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)

Affected Products

VendorProductAffected VersionsCPESubscribe
LinuxLinux 2516ab1543fdd1f9d08385d73cae51f668a9f3dc ~ 67e403136a0e1a55fef6a05f103a3979a39ad3fd -
LinuxLinux 4.12 -

II. Public POCs for CVE-2022-49297

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III. Intelligence Information for CVE-2022-49297

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Patches & Fixes for CVE-2022-49297 (8)

Same Patch Batch · Linux · 2025-02-26 · 706 CVEs total

CVE-2022-491499.8 CRITICALrxrpc: Fix call timer start racing with call destruction
CVE-2022-495619.8 CRITICALnetfilter: conntrack: re-fetch conntrack after insertion
CVE-2022-494079.8 CRITICALdlm: fix plock invalid read
CVE-2022-493629.8 CRITICALNFSD: Fix potential use-after-free in nfsd_file_put()
CVE-2022-492809.8 CRITICALNFSD: prevent underflow in nfssvc_decode_writeargs()
CVE-2022-493569.8 CRITICALSUNRPC: Trap RDMA segment overflows
CVE-2022-494189.8 CRITICALNFSv4: Fix free of uninitialized nfs4_label on referral lookup.
CVE-2022-490949.8 CRITICALnet/tls: fix slab-out-of-bounds bug in decrypt_internal
CVE-2022-490939.8 CRITICALskbuff: fix coalescing for page_pool fragment recycling
CVE-2022-492609.8 CRITICALcrypto: hisilicon/sec - fix the aead software fallback for engine
CVE-2022-491949.8 CRITICALnet: bcmgenet: Use stronger register read/writes to assure ordering
CVE-2022-492019.8 CRITICALibmvnic: fix race between xmit and reset
CVE-2022-490589.1 CRITICALcifs: potential buffer overflow in handling symlinks
CVE-2022-495358.8 HIGHscsi: lpfc: Fix null pointer dereference after failing to issue FLOGI and PLOGI
CVE-2022-491598.8 HIGHscsi: qla2xxx: Implement ref count for SRB
CVE-2022-491388.8 HIGHBluetooth: hci_event: Ignore multiple conn complete events
CVE-2022-494798.8 HIGHmt76: fix tx status related use-after-free race on station removal
CVE-2022-494708.8 HIGHBluetooth: btmtksdio: fix use-after-free at btmtksdio_recv_event
CVE-2022-491118.8 HIGHBluetooth: Fix use after free in hci_send_acl
CVE-2022-491148.8 HIGHscsi: libfc: Fix use after free in fc_exch_abts_resp()

Showing top 20 of 706 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2022-49297

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