Drivers: hv: vmbus: Fix potential crash on module unload
Priority LOW 24Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 5 fixed, 2 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat.
Summary
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.
Why it matters now
EPSS 0.00256 17th percentileScored 2026-11-07
Fix Partial Linux (Linux): 4.19.238, 5.4.189, 5.7 +5Red Hat: 2 advisoriesRed Hat: 5 fixed, 2 without a fix
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 4.19.118 to before 4.19.238; 5.4.35 to before 5.4.189; 5.6.7 to before 5.7 | 4.19.238, 5.4.189, 5.7 | Patch available | CNA |
| Linux | Linux | 5.7 and later | 4.19.238, 5.4.189, 5.10.111, 5.15.34, 5.16.20, 5.17.3, 5.18 | Patch available | CNA |
- Linux VendorLinux Affected 4.19.118 to before 4.19.238; 5.4.35 to before 5.4.189; 5.6.7 to before 5.7 Fixed in 4.19.238, 5.4.189, 5.7 Patch available CNA
- Linux VendorLinux Affected 5.7 and later Fixed in 4.19.238, 5.4.189, 5.10.111, 5.15.34, 5.16.20, 5.17.3, 5.18 Patch available CNA
CPE configurations NVD · 9
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 4.19.118 to before 4.19.238; 5.4.35 to before 5.4.189; 5.6.7 to before 5.7; 5.7.1 to before 5.10.111; 5.11 to before 5.15.34; 5.16 to before 5.16.20; 5.17 to before 5.17.3 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:5.7:-:*:*:*:*:*:* | 5.7 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:5.7:rc2:*:*:*:*:*:* | 5.7 rc2 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:5.7:rc3:*:*:*:*:*:* | 5.7 rc3 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:5.7:rc4:*:*:*:*:*:* | 5.7 rc4 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:5.7:rc5:*:*:*:*:*:* | 5.7 rc5 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:5.7:rc6:*:*:*:*:*:* | 5.7 rc6 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:5.7:rc7:*:*:*:*:*:* | 5.7 rc7 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:5.18:rc1:*:*:*:*:*:* | 5.18 rc1 | Vulnerable | Linux |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 4.19.118 to before 4.19.238; 5.4.35 to before 5.4.189; 5.6.7 to before 5.7; 5.7.1 to before 5.10.111; 5.11 to before 5.15.34; 5.16 to before 5.16.20; 5.17 to before 5.17.3 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:5.7:-:*:*:*:*:*:* Versions 5.7 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:5.7:rc2:*:*:*:*:*:* Versions 5.7 rc2 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:5.7:rc3:*:*:*:*:*:* Versions 5.7 rc3 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:5.7:rc4:*:*:*:*:*:* Versions 5.7 rc4 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:5.7:rc5:*:*:*:*:*:* Versions 5.7 rc5 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:5.7:rc6:*:*:*:*:*:* Versions 5.7 rc6 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:5.7:rc7:*:*:*:*:*:* Versions 5.7 rc7 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:5.18:rc1:*:*:*:*:*:* Versions 5.18 rc1 Vulnerable ·Linux
Remediation
- Fix · CNA Linux (Linux) Fixed in 4.19.238, 5.4.189, 5.7
- Fix · CNA Linux (Linux) Fixed in 4.19.238, 5.4.189, 5.10.111, 5.15.34, 5.16.20, 5.17.3, 5.18
Red Hat 2 advisories
- RHSA-2022:8267 Released 2022-11-15 · Red Hat rating Moderatekernel security, bug fix, and enhancement update
- Red Hat CodeReady Linux Builder (v. 9) kernel-tools-libs-devel-5.14.0-162.6.1.el9_1
- Red Hat Enterprise Linux AppStream (v. 9) kernel-debug-devel-5.14.0-162.6.1.el9_1, kernel-debug-devel-matched-5.14.0-162.6.1.el9_1, kernel-devel-5.14.0-162.6.1.el9_1 +5
- Red Hat Enterprise Linux BaseOS (v. 9) bpftool-5.14.0-162.6.1.el9_1, kernel-5.14.0-162.6.1.el9_1, kernel-abi-stablelists-5.14.0-162.6.1.el9_1 +14
- RHSA-2022:7683 Released 2022-11-08 · Red Hat rating Moderatekernel security, bug fix, and enhancement update
- Red Hat CodeReady Linux Builder (v. 8) kernel-tools-libs-devel-4.18.0-425.3.1.el8
- Red Hat Enterprise Linux BaseOS (v. 8) bpftool-4.18.0-425.3.1.el8, kernel-4.18.0-425.3.1.el8, kernel-abi-stablelists-4.18.0-425.3.1.el8 +19
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Out of support scope |
| Red Hat CodeReady Linux Builder (v. 8) | Fixed | RHSA-2022:7683 |
| Red Hat CodeReady Linux Builder (v. 9) | Fixed | RHSA-2022:8267 |
| Red Hat Enterprise Linux AppStream (v. 9) | Fixed | RHSA-2022:8267 |
| Red Hat Enterprise Linux BaseOS (v. 8) | Fixed | RHSA-2022:7683 |
| Red Hat Enterprise Linux BaseOS (v. 9) | Fixed | RHSA-2022:8267 |
Not affected: 3 products
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
Timeline
- 2026-10-02 Threatist record created from CVE-2022-49098
- 2026-10-03 Alias added: GHSA-h5qq-53rf-vmjc
References
Patch 7
- https://git.kernel.org/stable/c/6b4c0149a56147b29169e07000d566162892722a
- https://git.kernel.org/stable/c/2133c422a103cf7c7768c37b9ac382e73b691892
- https://git.kernel.org/stable/c/cf580d2e3884dbafd6b90269b03a24d661578624
- https://git.kernel.org/stable/c/dcd6b1a624c0ffa21034d8b1e02e9d068458f596
- https://git.kernel.org/stable/c/5ea98d0f5f035c1bcf1517ccec0e024ae35a48b2
- https://git.kernel.org/stable/c/3d0078f8bddd58d9bb1ad40bbe929f8633abb276
- https://git.kernel.org/stable/c/792f232d57ff28bbd5f9c4abe0466b23d5879dc8
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- TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
- TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
- TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
- TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
Sources
- CVE-2022-49098 · CVE Program
- CVE-2022-49098 · NVD
- FIRST EPSS
- GHSA-h5qq-53rf-vmjc · GitHub Advisory Database · CC BY 4.0
- CVE-2022-49098 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences