Linux: Out-of-bounds Read
CVE-2026-53346 is a high-severity out-of-bounds read vulnerability in Linux, with a CVSS 3.1 base score of 7.1 out of 10. It can be exploited with local access to the system by an attacker with a low-privileged account, without any action from a user. The record lists versions bde772ee239720af216fb0b14753971059e132dc, d0f25a1755f2c15b1746379c8d9d7dfde85f58f5, 7de13410f59e59b21d3c268a6e22d40f5d9d8a54 as the first without the flaw, so updating Linux to one of those releases or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.17% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update Linux to bde772ee239720af216fb0b14753971059e132dc or d0f25a1755f2c15b1746379c8d9d7dfde85f58f5 or 7de13410f59e59b21d3c268a6e22d40f5d9d8a54 or ac35b5580ace12e5d0a0b5e61e36d2c4e1ffa29c, whichever matches your release line, or a later version.
- Update Linux Kernel to 6.12.94 or 6.18.36 or 7.0.13, whichever matches your release line, or a later version.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Linux | Linux | d077242d68a31075ef5f5da041bf8f6fc19aa231 up to, but not including, bde772ee239720af216fb0b14753971059e132dc; d077242d68a31075ef5f5da041bf8f6fc19aa231 up to, but not including, d0f25a1755f2c15b1746379c8d9d7dfde85f58f5; d077242d68a31075ef5f5da041bf8f6fc19aa231 up to, but not including, 7de13410f59e59b21d3c268a6e22d40f5d9d8a54; d077242d68a31075ef5f5da041bf8f6fc19aa231 up to, but not including, ac35b5580ace12e5d0a0b5e61e36d2c4e1ffa29c; 6.12 | bde772ee239720af216fb0b14753971059e132dc, d0f25a1755f2c15b1746379c8d9d7dfde85f58f5, 7de13410f59e59b21d3c268a6e22d40f5d9d8a54, ac35b5580ace12e5d0a0b5e61e36d2c4e1ffa29c |
| Linux | Linux Kernel | 6.12 up to, but not including, 6.12.94; 6.13 up to, but not including, 6.18.36; 6.19 up to, but not including, 7.0.13; 7.1 | 6.12.94, 6.18.36, 7.0.13 |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- LocalThe attacker needs local access or must trick a user into running something.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- LowA basic user account is enough.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- NoneNothing can be modified.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H. Scored by NVD.
Official 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 ]
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Out-of-bounds Read
The product reads data past the end, or before the beginning, of the intended buffer.
How developers prevent this class of flaw
- Use a language that provides appropriate memory abstractions.
Timeline
- CVE record published.
- Record last changed materially (score, affected products, status or references).
References
Patches and release notes
Recent Out-of-bounds Read vulnerabilities
- 8.8 High severity
- 9.6 Critical severity
- 9.6 Critical severity
- 9.8 Critical severity
- 7.1 High severity
- 7.5 High severity
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