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Fencer Vulns
medium 5.5

CVE-2024-46742 json

smb/server: fix potential null-ptr-deref of lease_ctx_info in smb2_open()

published 2024-09-18 2 y ago modified 2026-06-17 4 mo ago also EUVD-2024-42003

cvss
5.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 17%
public exploits
0
none known

Summary

In the Linux kernel, the following vulnerability has been resolved:

smb/server: fix potential null-ptr-deref of lease_ctx_info in smb2_open()

null-ptr-deref will occur when (req_op_level == SMB2_OPLOCK_LEVEL_LEASE) and parse_lease_state() return NULL.

Fix this by check if 'lease_ctx_info' is NULL.

Additionally, remove the redundant parentheses in parse_durable_handle_context().

Patch / fix

  • Linux Linux 5.15.181, 6.1.135, 6.6.51, 6.10.10, 6.11
  • linux Debian 12 6.1.135-1
  • linux Debian 14, Debian 13 6.10.11-1

debian advisories DEBIAN-CVE-2024-46742

  • linux Ubuntu 22.04 LTS 5.15.0-144.157
  • linux-aws Ubuntu 22.04 LTS 5.15.0-1088.95
  • linux-gcp Ubuntu 22.04 LTS 5.15.0-1087.96
  • linux-gke Ubuntu 22.04 LTS 5.15.0-1085.91
  • linux-ibm Ubuntu 22.04 LTS 5.15.0-1080.83
  • linux-kvm Ubuntu 22.04 LTS 5.15.0-1084.89
  • linux-azure Ubuntu 22.04 LTS 5.15.0-1094.103
  • linux-gkeop Ubuntu 22.04 LTS 5.15.0-1070.78

ubuntu advisories UBUNTU-CVE-2024-46742

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • kernel CBL-Mariner 2.0 5.15.182.1-1

azure linux advisories AZL-49421

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2024-46742 updated cvss 5.5

kernel: smb/server: fix potential null-ptr-deref of lease_ctx_info in smb2_open()

  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-rt, kernel-core, kernel-tools, +29 more Red Hat Enterprise Linux 9 rv, perf, rtla, kernel, bpftool, libperf, +83 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.26% chance of exploitation in the next 30 days, higher than 17% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products

  • Linux Linux

Classification

Weakness
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.