CVE-2023-53034: ntb_hw_switchtec: Fix shift-out-of-bounds in switchtec_ntb_mw_set_trans
In the Linux kernel, the following vulnerability has been resolved:
ntbhwswitchtec: Fix shift-out-of-bounds in switchtecntbmwsettrans
There is a kernel API ntbmwcleartrans() would pass 0 to both addr and size. This would make xlatepos negative.
[ 23.734156] switchtec switchtec0: MW 0: part 0 addr 0x0000000000000000 size 0x0000000000000000 [ 23.734158] ================================================================================ [ 23.734172] UBSAN: shift-out-of-bounds in drivers/ntb/hw/mscc/ntbhwswitchtec.c:293:7 [ 23.734418] shift exponent -1 is negative
Ensuring xlatepos is a positive or zero before BIT.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
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debian/linuxto a version that resolves this vulnerability.Fixed in 6.1.176-1Fixed in 6.1.190-1Fixed in 6.12.107-1Fixed in 6.12.115-2Fixed in 7.2.12-1Fixed in 7.2.15-1
Event History
Frequently Asked Questions
What is the severity of CVE-2023-53034?
The severity of CVE-2023-53034 is classified as medium due to the potential for shift-out-of-bounds errors in the Linux kernel.
How do I fix CVE-2023-53034?
To fix CVE-2023-53034, upgrade to the latest patched version of the Linux kernel that addresses this vulnerability.
What versions of the Linux kernel are affected by CVE-2023-53034?
CVE-2023-53034 affects various versions of the Linux kernel from 4.16 up to 6.14.2, specifically within certain version ranges.
What causes the CVE-2023-53034 vulnerability?
The CVE-2023-53034 vulnerability is caused by a kernel API function ntb_mw_clear_trans() improperly passing zero values, leading to negative shifts.
Is CVE-2023-53034 exploitable?
Yes, CVE-2023-53034 is exploitable, potentially allowing unauthorized access or unintended behavior in systems running affected kernel versions.