CVE-2026-53346rust: arm64: set uwtable llvm module flag for CONFIG_UNWIND_TABLES
Updated under an hour ago ()
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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 ]
- CVSS
- 7.1 HIGH (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Analyzed
- Record last updated
- Jul 1, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from d077242d68a31075ef5f5da041bf8f6fc19aa231 before bde772ee239720af216fb0b14753971059e132dc; from d077242d68a31075ef5f5da041bf8f6fc19aa231 before d0f25a1755f2c15b1746379c8d9d7dfde85f58f5; from d077242d68a31075ef5f5da041bf8f6fc19aa231 before 7de13410f59e59b21d3c268a6e22d40f5d9d8a54; from d077242d68a31075ef5f5da041bf8f6fc19aa231 before ac35b5580ace12e5d0a0b5e61e36d2c4e1ffa29c | CNA record |
linux linux_kernel linux:linux_kernel | from 6.12 before 6.12.94; from 6.13 before 6.18.36; from 6.19 before 7.0.13; 7.1; 7.1; 7.1; 7.1; 7.1; and 1 more ranges | NVD |
References
- https://git.kernel.org/stable/c/bde772ee239720af216fb0b14753971059e132dcpatch
- https://git.kernel.org/stable/c/d0f25a1755f2c15b1746379c8d9d7dfde85f58f5patch
- https://git.kernel.org/stable/c/7de13410f59e59b21d3c268a6e22d40f5d9d8a54patch
- https://git.kernel.org/stable/c/ac35b5580ace12e5d0a0b5e61e36d2c4e1ffa29cpatch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.