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CVE-2022-49098— Drivers: hv: vmbus: Fix potential crash on module unload

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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vmbus驱动在模块卸载时未正确注销panic通知器，可能导致崩溃。

AI Predicted 3.3 Difficulty: Trivial EPSS 0.25% · P16

Possible ATT&CK Techniques 1 AI

T1562

Affected Version Matrix 20

VendorProduct Version RangeStatus
Linux Linux 5e059fc0f054309036d3f612bc8b0a502ca58545< 6b4c0149a56147b29169e07000d566162892722a affected
9f38f7b46de0747c1909e8c557aa21715dce20c5< 2133c422a103cf7c7768c37b9ac382e73b691892 affected
74347a99e73ae00b8385f1209aaea193c670f901< cf580d2e3884dbafd6b90269b03a24d661578624 affected
74347a99e73ae00b8385f1209aaea193c670f901< dcd6b1a624c0ffa21034d8b1e02e9d068458f596 affected
74347a99e73ae00b8385f1209aaea193c670f901< 5ea98d0f5f035c1bcf1517ccec0e024ae35a48b2 affected
74347a99e73ae00b8385f1209aaea193c670f901< 3d0078f8bddd58d9bb1ad40bbe929f8633abb276 affected
74347a99e73ae00b8385f1209aaea193c670f901< 792f232d57ff28bbd5f9c4abe0466b23d5879dc8 affected
caeeb3787167c884b955404a7e669fd77f267e44 affected
… +12 more rows
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I. Basic Information for CVE-2022-49098

Vulnerability Information
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Vulnerability Title
Drivers: hv: vmbus: Fix potential crash on module unload
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: Drivers: hv: vmbus: Fix potential crash on module unload The vmbus driver relies on the panic notifier infrastructure to perform some operations when a panic event is detected. Since vmbus can be built as module, it is required that the driver handles both registering and unregistering such panic notifier callback. After commit 74347a99e73a ("x86/Hyper-V: Unload vmbus channel in hv panic callback") though, the panic notifier registration is done unconditionally in the module initialization routine whereas the unregistering procedure is conditionally guarded and executes only if HV_FEATURE_GUEST_CRASH_MSR_AVAILABLE capability is set. This patch fixes that by unconditionally unregistering the panic notifier in the module's exit routine as well.
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vmbus驱动在模块卸载时未正确注销panic通知器，可能导致崩溃。
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

Vendor Product Affected Versions CPE Subscribe
Linux Linux 5e059fc0f054309036d3f612bc8b0a502ca58545 ~ 6b4c0149a56147b29169e07000d566162892722a -
Linux Linux 5.7 -

II. Public POCs for CVE-2022-49098

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III. Intelligence Information for CVE-2022-49098

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Patches & Fixes for CVE-2022-49098 (7)

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

CVE-2022-49149 9.8 CRITICAL rxrpc: Fix call timer start racing with call destruction
CVE-2022-49280 9.8 CRITICAL NFSD: prevent underflow in nfssvc_decode_writeargs()
CVE-2022-49356 9.8 CRITICAL SUNRPC: Trap RDMA segment overflows
CVE-2022-49093 9.8 CRITICAL skbuff: fix coalescing for page_pool fragment recycling
CVE-2022-49094 9.8 CRITICAL net/tls: fix slab-out-of-bounds bug in decrypt_internal
CVE-2022-49407 9.8 CRITICAL dlm: fix plock invalid read
CVE-2022-49418 9.8 CRITICAL NFSv4: Fix free of uninitialized nfs4_label on referral lookup.
CVE-2022-49561 9.8 CRITICAL netfilter: conntrack: re-fetch conntrack after insertion
CVE-2022-49362 9.8 CRITICAL NFSD: Fix potential use-after-free in nfsd_file_put()
CVE-2022-49194 9.8 CRITICAL net: bcmgenet: Use stronger register read/writes to assure ordering
CVE-2022-49260 9.8 CRITICAL crypto: hisilicon/sec - fix the aead software fallback for engine
CVE-2022-49201 9.8 CRITICAL ibmvnic: fix race between xmit and reset
CVE-2022-49058 9.1 CRITICAL cifs: potential buffer overflow in handling symlinks
CVE-2022-49519 8.8 HIGH ath10k: skip ath10k_halt during suspend for driver state RESTARTING
CVE-2022-49238 8.8 HIGH ath11k: free peer for station when disconnect from AP for QCA6390/WCN6855
CVE-2022-49471 8.8 HIGH rtw89: cfo: check mac_id to avoid out-of-bounds
CVE-2022-49159 8.8 HIGH scsi: qla2xxx: Implement ref count for SRB
CVE-2022-49500 8.8 HIGH wl1251: dynamically allocate memory used for DMA
CVE-2022-49479 8.8 HIGH mt76: fix tx status related use-after-free race on station removal
CVE-2022-49328 8.8 HIGH mt76: fix use-after-free by removing a non-RCU wcid pointer

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-2022-49098

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