CVE-2022-49098
Drivers: hv: vmbus: Fix potential crash on module unload
- Published
- Updated
- Reserved
- Assigned by
- Linux
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.
Timeline
ID reserved
By Linux
Published
- 15 months later
· 15 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Analyzed | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.26% · top 83% of all CVEs (8 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected 5e059fc0f054309036d3f612bc8b0a502ca58545 – < 6b4c0149a56147b29169e07000d566162892722a
- affected 9f38f7b46de0747c1909e8c557aa21715dce20c5 – < 2133c422a103cf7c7768c37b9ac382e73b691892
- affected 74347a99e73ae00b8385f1209aaea193c670f901 – < cf580d2e3884dbafd6b90269b03a24d661578624
- affected 74347a99e73ae00b8385f1209aaea193c670f901 – < dcd6b1a624c0ffa21034d8b1e02e9d068458f596
- affected 74347a99e73ae00b8385f1209aaea193c670f901 – < 5ea98d0f5f035c1bcf1517ccec0e024ae35a48b2
- affected 74347a99e73ae00b8385f1209aaea193c670f901 – < 3d0078f8bddd58d9bb1ad40bbe929f8633abb276
- affected 74347a99e73ae00b8385f1209aaea193c670f901 – < 792f232d57ff28bbd5f9c4abe0466b23d5879dc8
- affected caeeb3787167c884b955404a7e669fd77f267e44
- affected 4.19.118 – < 4.19.238
- affected 5.4.35 – < 5.4.189
- affected 5.6.7 – < 5.7
- affected 5.7
- unaffected < 5.7
- unaffected 4.19.238 – ≤ 4.19.*
- unaffected 5.4.189 – ≤ 5.4.*
- unaffected 5.10.111 – ≤ 5.10.*
- unaffected 5.15.34 – ≤ 5.15.*
- unaffected 5.16.20 – ≤ 5.16.*
- unaffected 5.17.3 – ≤ 5.17.*
- unaffected 5.18 – ≤ *
References (7)
- https://git.kernel.org/stable/c/6b4c0149a56147b29169e07000d566162892722a (opens in a new tab)
- https://git.kernel.org/stable/c/2133c422a103cf7c7768c37b9ac382e73b691892 (opens in a new tab)
- https://git.kernel.org/stable/c/cf580d2e3884dbafd6b90269b03a24d661578624 (opens in a new tab)
- https://git.kernel.org/stable/c/dcd6b1a624c0ffa21034d8b1e02e9d068458f596 (opens in a new tab)
- https://git.kernel.org/stable/c/5ea98d0f5f035c1bcf1517ccec0e024ae35a48b2 (opens in a new tab)
- https://git.kernel.org/stable/c/3d0078f8bddd58d9bb1ad40bbe929f8633abb276 (opens in a new tab)
- https://git.kernel.org/stable/c/792f232d57ff28bbd5f9c4abe0466b23d5879dc8 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2022-49098)Record last updated .