CVE-2023-53814

/// Technical description

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

PCI: Fix dropping valid root bus resources with .end = zero

On r8a7791/koelsch:

kmemleak: 1 new suspected memory leaks (see /sys/kernel/debug/kmemleak)

# cat /sys/kernel/debug/kmemleak

unreferenced object 0xc3a34e00 (size 64):

comm "swapper/0", pid 1, jiffies 4294937460 (age 199.080s)

hex dump (first 32 bytes):

b4 5d 81 f0 b4 5d 81 f0 c0 b0 a2 c3 00 00 00 00 .]...]..........

00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................

backtrace:

[<fe3aa979>] __kmalloc+0xf0/0x140

[<34bd6bc0>] resource_list_create_entry+0x18/0x38

[<767046bc>] pci_add_resource_offset+0x20/0x68

[<b3f3edf2>] devm_of_pci_get_host_bridge_resources.constprop.0+0xb0/0x390

When coalescing two resources for a contiguous aperture, the second

resource is enlarged to cover the full contiguous range, while the first

resource is marked invalid. This invalidation is done by clearing the

f

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References