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
Configurations
Configuration 1 (hide)
|
History
11 Dec 2024, 15:05
| Type | Values Removed | Values Added |
|---|---|---|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 7.1 |
| CWE | CWE-125 | |
| References | () https://git.kernel.org/stable/c/3719d3c36aa853d5a2401af9f8d6b116c91ad5ae - Patch | |
| References | () https://git.kernel.org/stable/c/3770c38cd6a60494da29ac2da73ff8156440a2d1 - Patch | |
| References | () https://git.kernel.org/stable/c/5b784489c8158518bf7a466bb3cc045b0fb66b4b - Patch | |
| References | () https://git.kernel.org/stable/c/6788b10620ca6e98575d1e06e72a8974aad7657e - Patch | |
| References | () https://git.kernel.org/stable/c/cd287cc208dfe6bd6da98e7f88e723209242c9b4 - Patch | |
| References | () https://git.kernel.org/stable/c/d35652a5fc9944784f6f50a5c979518ff8dacf61 - Patch | |
| References | () https://git.kernel.org/stable/c/ecba5afe86f30605eb9dfb7f265a8de0218d4cfc - Patch | |
| First Time |
Linux linux Kernel
Linux |
|
| CPE | cpe:2.3:o:linux:linux_kernel:6.6:rc4:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.6:rc3:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.6:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.6:rc5:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.6:rc2:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
Information
Published : 2024-03-02 22:15
Updated : 2024-12-11 15:05
NVD link : CVE-2023-52504
Mitre link : CVE-2023-52504
CVE.ORG link : CVE-2023-52504
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-125
Out-of-bounds Read