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NVD / CVE Program· CNA Linux

CVE-2022-49788: misc/vmw_vmci: fix an infoleak in vmci_host_do_receive_datagram()

Noroxi assessment

Priority: Monitor (action score 22/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.23% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 5a275528025ae4bc7e2232866856dfebf84b2fad, 62634b43d3c4e1bf62fd540196f7081bf0885c0a, 76c50d77b928a33e5290aaa9fdc10e88254ff8c7.

Low priority for now. Upgrade to Linux Linux 5a275528025ae4bc7e2232866856dfebf84b2fad, 62634b43d3c4e1bf62fd540196f7081bf0885c0a, 76c50d77b928a33e5290aaa9fdc10e88254ff8c7 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: misc/vmw_vmci: fix an infoleak in vmci_host_do_receive_datagram() `struct vmci_event_qp` allocated by qp_notify_peer() contains padding, which may carry uninitialized data to the userspace, as observed by KMSAN: BUG: KMSAN: kernel-infoleak in instrument_copy_to_user ./include/linux/instrumented.h:121 instrument_copy_to_user ./include/linux/instrumented.h:121 _copy_to_user+0x5f/0xb0 lib/usercopy.c:33 copy_to_user ./include/linux/uaccess.h:169 vmci_host_do_receive_datagram drivers/misc/vmw_vmci/vmci_host.c:431 vmci_host_unlocked_ioctl+0x33d/0x43d0 drivers/misc/vmw_vmci/vmci_host.c:925 vfs_ioctl fs/ioctl.c:51 ... Uninit was stored to memory at: kmemdup+0x74/0xb0 mm/util.c:131 dg_dispatch_as_host drivers/misc/vmw_vmci/vmci_datagram.c:271 vmci_datagram_dispatch+0x4f8/0xfc0 drivers/misc/vmw_vmci/vmci_datagram.c:339 qp_notify_peer+0x19a/0x290 drivers/misc/vmw_vmci/vmci_queue_pair.c:1479 qp_broker_attach drivers/misc/vmw_vmci/vmci_queue_pair.c:1662 qp_broker_alloc+0x2977/0x2f30 drivers/misc/vmw_vmci/vmci_queue_pair.c:1750 vmci_qp_broker_alloc+0x96/0xd0 drivers/misc/vmw_vmci/vmci_queue_pair.c:1940 vmci_host_do_alloc_queuepair drivers/misc/vmw_vmci/vmci_host.c:488 vmci_host_unlocked_ioctl+0x24fd/0x43d0 drivers/misc/vmw_vmci/vmci_host.c:927 ... Local variable ev created at: qp_notify_peer+0x54/0x290 drivers/misc/vmw_vmci/vmci_queue_pair.c:1456 qp_broker_attach drivers/misc/vmw_vmci/vmci_queue_pair.c:1662 qp_broker_alloc+0x2977/0x2f30 drivers/misc/vmw_vmci/vmci_queue_pair.c:1750 Bytes 28-31 of 48 are uninitialized Memory access of size 48 starts at ffff888035155e00 Data copied to user address 0000000020000100 Use memset() to prevent the infoleaks. Also speculatively fix qp_notify_peer_local(), which may suffer from the same problem.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
May 1, 2025
Updated
Nov 5, 2026
EPSS
0.2% · 14th percentile

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
linuxlinux kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernel3.9 and later · before 4.9.334
  • linux linux kernel4.10 and later · before 4.14.300
  • linux linux kernel4.15 and later · before 4.19.267
  • linux linux kernel4.20 and later · before 5.4.225
  • linux linux kernel5.5 and later · before 5.10.156
  • linux linux kernel5.11 and later · before 5.15.80
  • linux linux kernel5.16 and later · before 6.0.10
  • linux linux kernel6.1

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 3.9affected
    • 06164d2b72aa752ce4633184b3e0d97601017135 and later · before 7ccf7229b96fadc3a185d1391f814a604c7ef609affected · git
    • 06164d2b72aa752ce4633184b3e0d97601017135 and later · before f04586c2315cfd03d72ad0395705435e7ed07b1aaffected · git
    • 06164d2b72aa752ce4633184b3e0d97601017135 and later · before 5a275528025ae4bc7e2232866856dfebf84b2fadaffected · git
    • 06164d2b72aa752ce4633184b3e0d97601017135 and later · before e7061dd1fef2dfb6458cd521aef27aa66f510d31affected · git
    • 06164d2b72aa752ce4633184b3e0d97601017135 and later · before 62634b43d3c4e1bf62fd540196f7081bf0885c0aaffected · git
    • 06164d2b72aa752ce4633184b3e0d97601017135 and later · before 8e2f33c598370bcf828bab4d667d1d38bcd3c57daffected · git
    • 06164d2b72aa752ce4633184b3e0d97601017135 and later · before 76c50d77b928a33e5290aaa9fdc10e88254ff8c7affected · git
    • 06164d2b72aa752ce4633184b3e0d97601017135 and later · before e5b0d06d9b10f5f43101bd6598b076c347f9295faffected · git
    • before 3.9not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
AlmaLinux:8bpftoolbefore 4.18.0-553.62.1.el8_104.18.0-553.62.1.el8_10
AlmaLinux:8kernelbefore 4.18.0-553.62.1.el8_104.18.0-553.62.1.el8_10
AlmaLinux:8kernel-abi-stablelistsbefore 4.18.0-553.62.1.el8_104.18.0-553.62.1.el8_10
AlmaLinux:8kernel-corebefore 4.18.0-553.62.1.el8_104.18.0-553.62.1.el8_10
AlmaLinux:8kernel-cross-headersbefore 4.18.0-553.62.1.el8_104.18.0-553.62.1.el8_10
AlmaLinux:8kernel-debugbefore 4.18.0-553.62.1.el8_104.18.0-553.62.1.el8_10
AlmaLinux:8kernel-debug-corebefore 4.18.0-553.62.1.el8_104.18.0-553.62.1.el8_10
AlmaLinux:8kernel-debug-develbefore 4.18.0-553.62.1.el8_104.18.0-553.62.1.el8_10
AlmaLinux:8kernel-debug-modulesbefore 4.18.0-553.62.1.el8_104.18.0-553.62.1.el8_10
AlmaLinux:8kernel-debug-modules-extrabefore 4.18.0-553.62.1.el8_104.18.0-553.62.1.el8_10
AlmaLinux:8kernel-develbefore 4.18.0-553.62.1.el8_104.18.0-553.62.1.el8_10
AlmaLinux:8kernel-docbefore 4.18.0-553.62.1.el8_104.18.0-553.62.1.el8_10
AlmaLinux:8kernel-headersbefore 4.18.0-553.62.1.el8_104.18.0-553.62.1.el8_10
AlmaLinux:8kernel-modulesbefore 4.18.0-553.62.1.el8_104.18.0-553.62.1.el8_10
AlmaLinux:8kernel-modules-extrabefore 4.18.0-553.62.1.el8_104.18.0-553.62.1.el8_10
AlmaLinux:8kernel-rtbefore 4.18.0-553.62.1.rt7.403.el8_104.18.0-553.62.1.rt7.403.el8_10
AlmaLinux:8kernel-rt-corebefore 4.18.0-553.62.1.rt7.403.el8_104.18.0-553.62.1.rt7.403.el8_10
AlmaLinux:8kernel-rt-debugbefore 4.18.0-553.62.1.rt7.403.el8_104.18.0-553.62.1.rt7.403.el8_10
AlmaLinux:8kernel-rt-debug-corebefore 4.18.0-553.62.1.rt7.403.el8_104.18.0-553.62.1.rt7.403.el8_10
AlmaLinux:8kernel-rt-debug-develbefore 4.18.0-553.62.1.rt7.403.el8_104.18.0-553.62.1.rt7.403.el8_10
AlmaLinux:8kernel-rt-debug-modulesbefore 4.18.0-553.62.1.rt7.403.el8_104.18.0-553.62.1.rt7.403.el8_10
AlmaLinux:8kernel-rt-debug-modules-extrabefore 4.18.0-553.62.1.rt7.403.el8_104.18.0-553.62.1.rt7.403.el8_10
AlmaLinux:8kernel-rt-develbefore 4.18.0-553.62.1.rt7.403.el8_104.18.0-553.62.1.rt7.403.el8_10
AlmaLinux:8kernel-rt-modulesbefore 4.18.0-553.62.1.rt7.403.el8_104.18.0-553.62.1.rt7.403.el8_10

+96

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now

Published before and after this one in the same product

  • ← EarlierCVE-2022-49784May 1, 2025 · perf/x86/amd/uncore: Fix memory leak for events array
    22Monitor
  • ← EarlierCVE-2022-49786May 1, 2025 · blk-cgroup: properly pin the parent in blkcg_css_online
    22Monitor
  • Later →CVE-2022-49791May 1, 2025 · io_uring: fix multishot accept request leaks
    22Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux5a275528025ae4bc7e2232866856dfebf84b2fadVendor (CNA)
Linux Linux62634b43d3c4e1bf62fd540196f7081bf0885c0aVendor (CNA)
Linux Linux76c50d77b928a33e5290aaa9fdc10e88254ff8c7Vendor (CNA)
Linux Linux7ccf7229b96fadc3a185d1391f814a604c7ef609Vendor (CNA)
Linux Linux8e2f33c598370bcf828bab4d667d1d38bcd3c57dVendor (CNA)
Linux Linuxe5b0d06d9b10f5f43101bd6598b076c347f9295fVendor (CNA)
Linux Linuxe7061dd1fef2dfb6458cd521aef27aa66f510d31Vendor (CNA)
Linux Linuxf04586c2315cfd03d72ad0395705435e7ed07b1aVendor (CNA)
almalinux:bpftool4.18.0-553.62.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel4.18.0-553.62.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-abi-stablelists4.18.0-553.62.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-core4.18.0-553.62.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-cross-headers4.18.0-553.62.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-debug4.18.0-553.62.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-debug-core4.18.0-553.62.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-debug-devel4.18.0-553.62.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-debug-modules4.18.0-553.62.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-debug-modules-extra4.18.0-553.62.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-devel4.18.0-553.62.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-doc4.18.0-553.62.1.el8_10 · AlmaLinux:8Package registry (OSV)
debian:linux6.0.10-1 · Debian:12Package registry (OSV)
red hat:bpftool0:4.18.0-553.62.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:bpftool-debuginfo0:4.18.0-553.62.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel0:4.18.0-553.62.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-abi-stablelists0:4.18.0-553.62.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-core0:4.18.0-553.62.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-debug0:4.18.0-553.62.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-debug-core0:4.18.0-553.62.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-debug-debuginfo0:4.18.0-553.62.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-debug-devel0:4.18.0-553.62.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)

+17

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2024-50302163 days apartHID: core: zero-initialize the report bufferKEV
    52Plan
  • CVE-2026-52989419 days apartnvmet-tcp: propagate nvmet_tcp_build_pdu_iovec() errors to its callers
    39Monitor
  • CVE-2024-47685192 days apartnetfilter: nf_reject_ipv6: fix nf_reject_ip6_tcphdr_put()
    36Monitor
  • CVE-2026-53225420 days apartsctp: fix uninit-value in __sctp_rcv_asconf_lookup()
    36Monitor
  • CVE-2026-53170420 days apartaccel/ethosu: reject DMA commands with uninitialized length
    35Monitor
  • CVE-2026-43139370 days apartxfrm6: fix uninitialized saddr in xfrm6_get_saddr()
    34Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-908 · Use of Uninitialized Resource

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. SSVC exploitation— → none
  2. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (7 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records