cbcvebase.
CVE-2024-49987
published 2024-10-21

CVE-2024-49987: In the Linux kernel, the following vulnerability has been resolved: bpftool: Fix undefined behavior in qsort(NULL, 0, ...) When netfilter has no entry to…

PriorityP419medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.24%
14.4th percentile
In the Linux kernel, the following vulnerability has been resolved: bpftool: Fix undefined behavior in qsort(NULL, 0, ...) When netfilter has no entry to display, qsort is called with qsort(NULL, 0, ...). This results in undefined behavior, as UBSan reports: net.c:827:2: runtime error: null pointer passed as argument 1, which is declared to never be null Although the C standard does not explicitly state whether calling qsort with a NULL pointer when the size is 0 constitutes undefined behavior, Section 7.1.4 of the C standard (Use of library functions) mentions: "Each of the following statements applies unless explicitly stated otherwise in the detailed descriptions that follow: If an argument to a function has an invalid value (such as a value outside the domain of the function, or a pointer outside the address space of the program, or a null pointer, or a pointer to non-modifiable storage when the corresponding parameter is not const-qualified) or a type (after promotion) not expected by a function with variable number of arguments, the behavior is undefined." To avoid this, add an early return when nf_link_info is NULL to prevent calling qsort with a NULL pointer.

Affected

20 ranges
VendorProductVersion rangeFixed in
debianlinux< linux 6.11.4-1 (forky)linux 6.11.4-1 (forky)
linuxlinux
linuxlinux>= d0fe92fb5e3df6991c640fb9205d880b68603259 < c2d9f9a7837ab29ccae0c42252f17d436bf0a501c2d9f9a7837ab29ccae0c42252f17d436bf0a501
linuxlinux>= d0fe92fb5e3df6991c640fb9205d880b68603259 < 2e0f6f33f2aa87493b365a38a8fd87b8854b77342e0f6f33f2aa87493b365a38a8fd87b8854b7734
linuxlinux>= d0fe92fb5e3df6991c640fb9205d880b68603259 < c208b02827eb642758cef65641995fd3f38c89afc208b02827eb642758cef65641995fd3f38c89af
linuxlinux>= d0fe92fb5e3df6991c640fb9205d880b68603259 < f04e2ad394e2755d0bb2d858ecb5598718bf00d5f04e2ad394e2755d0bb2d858ecb5598718bf00d5
linuxlinux_kernel< 6.6.556.6.55
linuxlinux_kernel>= 0 < 6.11.4-16.11.4-1
linuxlinux_kernel>= 0 < 6.11.4-16.11.4-1
linuxlinux_kernel>= 0 < 6.8.0-54.566.8.0-54.56
linuxlinux_kernel>= 0 < 6.11.0-18.186.11.0-18.18
linuxlinux_kernel>= 6.11 < 6.11.36.11.3
linuxlinux_kernel>= 6.7 < 6.10.146.10.14
msrcazl3_kernel_6.6.51.1-5_on_azure_linux_3.0
msrcazl3_kernel_6.6.57.1-2_on_azure_linux_3.0
msrcazure_linux_3.0_arm
msrcazure_linux_3.0_x64
msrccbl2_kernel_5.15.186.1-1_on_cbl_mariner_2.0
msrccbl2_kernel_5.15.200.1-1_on_cbl_mariner_2.0
msrccbl2_kernel_5.15.202.1-1_on_cbl_mariner_2.0

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv8.8HIGH
vendor_ubuntu8.8HIGH
vendor_debian5.5LOW
vendor_msrc5.5MEDIUM
vendor_redhat5.5MEDIUM
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