In the Linux kernel, the following vulnerability has been resolved:
ice: Fix improper handling of refcount in ice_sriov_set_msix_vec_count()
This patch addresses an issue with improper reference count handling in the
ice_sriov_set_msix_vec_count() function.
First, the function calls ice_get_vf_by_id(), which increments the
reference count of the vf pointer. If the subsequent call to
ice_get_vf_vsi() fails, the function currently returns an error without
decrementing the reference count of the vf pointer, leading to a reference
count leak. The correct behavior, as implemented in this patch, is to
decrement the reference count using ice_put_vf(vf) before returning an
error when vsi is NULL.
Second, the function calls ice_sriov_get_irqs(), which sets
vf->first_vector_idx. If this call returns a negative value, indicating an
error, the function returns an error without decrementing the reference
count of the vf pointer, resulting in another reference count leak. The
patch addresses this by adding a call to ice_put_vf(vf) before returning
an error when vf->first_vector_idx < 0.
This bug was identified by an experimental static analysis tool developed
by our team. The tool specializes in analyzing reference count operations
and identifying potential mismanagement of reference counts. In this case,
the tool flagged the missing decrement operation as a potential issue,
leading to this patch.
References
Configurations
Configuration 1 (hide)
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History
25 Oct 2024, 14:50
Type | Values Removed | Values Added |
---|---|---|
CWE | NVD-CWE-Other | |
CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.12:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.12:rc2:*:*:*:*:*:* |
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First Time |
Linux linux Kernel
Linux |
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CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
References | () https://git.kernel.org/stable/c/416dbb815ca69684de148328990ba0ec53e6dbc1 - Patch | |
References | () https://git.kernel.org/stable/c/d517cf89874c6039e6294b18d66f40988e62502a - Patch |
23 Oct 2024, 15:12
Type | Values Removed | Values Added |
---|---|---|
Summary |
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21 Oct 2024, 20:15
Type | Values Removed | Values Added |
---|---|---|
New CVE |
Information
Published : 2024-10-21 20:15
Updated : 2024-10-25 14:50
NVD link : CVE-2024-50020
Mitre link : CVE-2024-50020
CVE.ORG link : CVE-2024-50020
JSON object : View
Products Affected
linux
- linux_kernel
CWE