CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
AI Score
Confidence
High
EPSS
Percentile
5.1%
In the Linux kernel, the following vulnerability has been resolved:
net: qlogic: qlcnic: Fix a NULL pointer dereference in qlcnic_83xx_add_rings()
In qlcnic_83xx_add_rings(), the indirect function of
ahw->hw_ops->alloc_mbx_args will be called to allocate memory for
cmd.req.arg, and there is a dereference of it in qlcnic_83xx_add_rings(),
which could lead to a NULL pointer dereference on failure of the
indirect function like qlcnic_83xx_alloc_mbx_args().
Fix this bug by adding a check of alloc_mbx_args(), this patch
imitates the logic of mbx_cmd()'s failure handling.
This bug was found by a static analyzer. The analysis employs
differential checking to identify inconsistent security operations
(e.g., checks or kfrees) between two code paths and confirms that the
inconsistent operations are not recovered in the current function or
the callers, so they constitute bugs.
Note that, as a bug found by static analysis, it can be a false
positive or hard to trigger. Multiple researchers have cross-reviewed
the bug.
Builds with CONFIG_QLCNIC=m show no new warnings, and our
static analyzer no longer warns about this code.
Vendor | Product | Version | CPE |
---|---|---|---|
linux | linux_kernel | * | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
git.kernel.org/stable/c/15fa12c119f869173f9b710cbe6a4a14071d2105
git.kernel.org/stable/c/3a061d54e260b701b538873b43e399d9b8b83e03
git.kernel.org/stable/c/550658a2d61e4eaf522c8ebc7fad76dc376bfb45
git.kernel.org/stable/c/57af54a56024435d83e44c78449513b414eb6edf
git.kernel.org/stable/c/b4f217d6fcc00c3fdc0921a7691f30be7490b073
git.kernel.org/stable/c/bbeb0325a7460ebf1e03f5e0bfc5c652fba9519f
git.kernel.org/stable/c/c5ef33c1489b2cd74368057fa00b5d2183bb5853
git.kernel.org/stable/c/e2dabc4f7e7b60299c20a36d6a7b24ed9bf8e572