cbcvebase.
CVE-2024-44964
published 2024-09-04

CVE-2024-44964: In the Linux kernel, the following vulnerability has been resolved: idpf: fix memory leaks and crashes while performing a soft reset The second tagged commit…

PriorityP338high7.8CVSS 3.1
AVLACLPRLUINSUCHIHAH
EPSS
0.23%
13.5th percentile
In the Linux kernel, the following vulnerability has been resolved: idpf: fix memory leaks and crashes while performing a soft reset The second tagged commit introduced a UAF, as it removed restoring q_vector->vport pointers after reinitializating the structures. This is due to that all queue allocation functions are performed here with the new temporary vport structure and those functions rewrite the backpointers to the vport. Then, this new struct is freed and the pointers start leading to nowhere. But generally speaking, the current logic is very fragile. It claims to be more reliable when the system is low on memory, but in fact, it consumes two times more memory as at the moment of running this function, there are two vports allocated with their queues and vectors. Moreover, it claims to prevent the driver from running into "bad state", but in fact, any error during the rebuild leaves the old vport in the partially allocated state. Finally, if the interface is down when the function is called, it always allocates a new queue set, but when the user decides to enable the interface later on, vport_open() allocates them once again, IOW there's a clear memory leak here. Just don't allocate a new queue set when performing a reset, that solves crashes and memory leaks. Readd the old queue number and reopen the interface on rollback - that solves limbo states when the device is left disabled and/or without HW queues enabled.

Affected

8 ranges
VendorProductVersion rangeFixed in
debianlinux< linux 6.10.6-1 (forky)linux 6.10.6-1 (forky)
linuxlinux
linuxlinux>= 02cbfba1add5bd9088c7d14c6b93b77a6ea8f3bb < 6b289f8d91537ec1e4f9c7b38b31b90d93b1419b6b289f8d91537ec1e4f9c7b38b31b90d93b1419b
linuxlinux>= 02cbfba1add5bd9088c7d14c6b93b77a6ea8f3bb < f01032a2ca099ec8d619aaa916c3762aa62495dff01032a2ca099ec8d619aaa916c3762aa62495df
linuxlinux_kernel
linuxlinux_kernel>= 0 < 6.10.6-16.10.6-1
linuxlinux_kernel>= 0 < 6.10.6-16.10.6-1
linuxlinux_kernel>= 6.7 < 6.10.56.10.5

CVSS provenance

nvdv3.17.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
osv7.8HIGH
vendor_debian7.8LOW
vendor_redhat7.8HIGH
vendor_ubuntu7.8HIGH
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