CVE-2022-49098: Drivers: hv: vmbus: Fix potential crash on module unload
Vulnerability summary
CVE-2022-49098 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.26% chance of exploitation in the next 30 days, higher than 17.2% of scored vulnerabilities.
Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 9 · Related 7Timeline
- 26-02-2025PublishedVulnerability first disclosed.
- 23-05-2026Last modifiedVulnerability information updated.
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.
CVSS metrics
3 scores · 3 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.26%
Chance of exploitation in the next 30 days
Percentile
17%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.26% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeNo weakness data has been published for this record.
Affected systems
Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu103 products
- linux< 5.4.0-117.132 | < 5.15.0-37.39
- linux-allwinner-5.19All versions (No fix recorded)
- linux-aws< 5.4.0-1078.84 | < 5.15.0-1011.14
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Linux2 products
- linux≥ 5e059fc0f054309036d3f612bc8b0a502ca58545, < 6b4c0149a56147b29169e07000d566162892722a | ≥ 9f38f7b46de0747c1909e8c557aa21715dce20c5, < 2133c422a103cf7c7768c37b9ac382e73b691892 | ≥ 74347a99e73ae00b8385f1209aaea193c670f901, < cf580d2e3884dbafd6b90269b03a24d661578624 | ≥ 74347a99e73ae00b8385f1209aaea193c670f901, < dcd6b1a624c0ffa21034d8b1e02e9d068458f596 | ≥ 74347a99e73ae00b8385f1209aaea193c670f901, < 5ea98d0f5f035c1bcf1517ccec0e024ae35a48b2 | ≥ 74347a99e73ae00b8385f1209aaea193c670f901, < 3d0078f8bddd58d9bb1ad40bbe929f8633abb276 | ≥ 74347a99e73ae00b8385f1209aaea193c670f901, < 792f232d57ff28bbd5f9c4abe0466b23d5879dc8 | caeeb3787167c884b955404a7e669fd77f267e44 | ≥ 4.19.118, < 4.19.238 | ≥ 5.4.35, < 5.4.189 | ≥ 5.6.7, < 5.7 | 5.7
- linux_kernel≥ 4.19.118, < 4.19.238 | ≥ 5.4.35, < 5.4.189 | ≥ 5.6.7, < 5.7 | ≥ 5.7.1, < 5.10.111 | ≥ 5.11, < 5.15.34 | ≥ 5.16, < 5.16.20 | ≥ 5.17, < 5.17.3 | 5.7 | 5.7:rc2 | 5.7:rc3 | 5.7:rc4 | 5.7:rc5 | 5.7:rc6 | 5.7:rc7 | 5.18:rc1
Debian1 product
- linux< 5.17.3-1
3 vendors · 106 products
