CVE - CVE-2023-52504

CVE-ID
CVE-2023-52504	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
In the Linux kernel, the following vulnerability has been resolved: x86/alternatives: Disable KASAN in apply_alternatives() Fei has reported that KASAN triggers during apply_alternatives() on a 5-level paging machine: BUG: KASAN: out-of-bounds in rcu_is_watching() Read of size 4 at addr ff110003ee6419a0 by task swapper/0/0 ... __asan_load4() rcu_is_watching() trace_hardirqs_on() text_poke_early() apply_alternatives() ... On machines with 5-level paging, cpu_feature_enabled(X86_FEATURE_LA57) gets patched. It includes KASAN code, where KASAN_SHADOW_START depends on __VIRTUAL_MASK_SHIFT, which is defined with cpu_feature_enabled(). KASAN gets confused when apply_alternatives() patches the KASAN_SHADOW_START users. A test patch that makes KASAN_SHADOW_START static, by replacing __VIRTUAL_MASK_SHIFT with 56, works around the issue. Fix it for real by disabling KASAN while the kernel is patching alternatives. [ mingo: updated the changelog ]
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/3719d3c36aa853d5a2401af9f8d6b116c91ad5ae URL:https://git.kernel.org/stable/c/3719d3c36aa853d5a2401af9f8d6b116c91ad5ae MISC:https://git.kernel.org/stable/c/3770c38cd6a60494da29ac2da73ff8156440a2d1 URL:https://git.kernel.org/stable/c/3770c38cd6a60494da29ac2da73ff8156440a2d1 MISC:https://git.kernel.org/stable/c/5b784489c8158518bf7a466bb3cc045b0fb66b4b URL:https://git.kernel.org/stable/c/5b784489c8158518bf7a466bb3cc045b0fb66b4b MISC:https://git.kernel.org/stable/c/6788b10620ca6e98575d1e06e72a8974aad7657e URL:https://git.kernel.org/stable/c/6788b10620ca6e98575d1e06e72a8974aad7657e MISC:https://git.kernel.org/stable/c/cd287cc208dfe6bd6da98e7f88e723209242c9b4 URL:https://git.kernel.org/stable/c/cd287cc208dfe6bd6da98e7f88e723209242c9b4 MISC:https://git.kernel.org/stable/c/d35652a5fc9944784f6f50a5c979518ff8dacf61 URL:https://git.kernel.org/stable/c/d35652a5fc9944784f6f50a5c979518ff8dacf61 MISC:https://git.kernel.org/stable/c/ecba5afe86f30605eb9dfb7f265a8de0218d4cfc URL:https://git.kernel.org/stable/c/ecba5afe86f30605eb9dfb7f265a8de0218d4cfc
Assigning CNA
kernel.org
Date Record Created
20240220	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20240220)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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