CVE-2023-52504
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2023
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
x86/alternatives: Disable KASAN in apply_alternatives()
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 ]
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 6657fca06e3ffab8d0b3f9d8b397f5ee498952d7 | affected | git | 3719d3c36aa853d5a2401af9f8d6b116c91ad5ae | Unavailable | None listed |
| 6657fca06e3ffab8d0b3f9d8b397f5ee498952d7 | affected | git | 3770c38cd6a60494da29ac2da73ff8156440a2d1 | Unavailable | None listed |
| 6657fca06e3ffab8d0b3f9d8b397f5ee498952d7 | affected | git | 6788b10620ca6e98575d1e06e72a8974aad7657e | Unavailable | None listed |
| 6657fca06e3ffab8d0b3f9d8b397f5ee498952d7 | affected | git | ecba5afe86f30605eb9dfb7f265a8de0218d4cfc | Unavailable | None listed |
| 6657fca06e3ffab8d0b3f9d8b397f5ee498952d7 | affected | git | 5b784489c8158518bf7a466bb3cc045b0fb66b4b | Unavailable | None listed |
| 6657fca06e3ffab8d0b3f9d8b397f5ee498952d7 | affected | git | cd287cc208dfe6bd6da98e7f88e723209242c9b4 | Unavailable | None listed |
| 6657fca06e3ffab8d0b3f9d8b397f5ee498952d7 | affected | git | d35652a5fc9944784f6f50a5c979518ff8dacf61 | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 4.17 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 4.17 | Unavailable | None listed |
| 4.19.297 | unaffected | semver | Unavailable | 4.19.* | None listed |
| 5.4.270 | unaffected | semver | Unavailable | 5.4.* | None listed |
| 5.10.199 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.136 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.59 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.5.8 | unaffected | semver | Unavailable | 6.5.* | None listed |
| 6.6 | unaffected | original_commit_for_fix | Unavailable | * | None listed |