# CVE-2026-53346: linux: In the Linux kernel, the following vulnerability has been resolved:  rust: arm64: set uwtable llvm module flag for CO...

CVE-2026-53346 is fixed in linux on 1 platform, first by DEBIAN-CVE-2026-53346, released July 2, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-53346
- Priority: High
- CVSS: 7.1 (high)
- EPSS: 0.0017
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 1, 2026

## Description

In the Linux kernel, the following vulnerability has been resolved:  rust: arm64: set uwtable llvm module flag for CONFIG_UNWIND_TABLES  Due to a rustc bug [1] the -Cforce-unwind-tables=y flag only emits the uwtable annotation for functions, but not for the module. This means that compiler-generated functions such as 'asan.module_ctor' do not receive the uwtable annotation.  When CONFIG_UNWIND_PATCH_PAC_INTO_SCS is enabled, this leads to boot failures because the dwarf information emitted for the kasan constructors is wrong, which causes the SCS boot patching code to patch the constructor in an illegal manner. Specifically, the paciasp instruction is patched, but the autiasp instruction is not. This mismatch leads to a crash when the constructor is called during boot.  	================================================================== 	BUG: KASAN: global-out-of-bounds in do_basic_setup+0x4c/0x90 	Read of size 8 at addr ffffffe3cc7eb488 by task swapper/0/1  Specifically the faulting instruction is the (*fn)() to invoke the constructor in do_ctors() of the init/main.c file.  Once the fix lands in rustc, this flag can be made conditional on the rustc version. Note that passing the flag on a rustc with the fix present has no effect.  [ The fix [1] has landed for Rust 1.98.0 (expected release on   2026-08-20).    Thus add a version check as discussed.      - Miguel ]  [ Adjusted link and comment. - Miguel ]

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 13.5 (trixie) | 6.12.94-1 | [DEBIAN-CVE-2026-53346](https://patchblox.com/security/data/fix/linux/debian-cve-2026-53346.md) | Jul 2, 2026 |
| Linux | linux Debian 14 | 7.0.13-1 | [DEBIAN-CVE-2026-53346](https://patchblox.com/security/data/fix/linux/debian-cve-2026-53346.md) | Jul 2, 2026 |

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Data as of 2026-11-08T06:59:42Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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