Linux: Out-of-bounds Read
CVE-2026-43005 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 79b7e588399bb55f4c10bea6ca41b6c3b944d2bb, 6999b4769e2a61c463158927102e8c07e3f69ba2, 0e211f6aaa6a00fd0ee0c1eea5498f168c6725e6 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 0.12% 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 79b7e588399bb55f4c10bea6ca41b6c3b944d2bb or 6999b4769e2a61c463158927102e8c07e3f69ba2 or 0e211f6aaa6a00fd0ee0c1eea5498f168c6725e6, whichever matches your release line, or a later version.
- Update Linux Kernel to 6.18.22 or 6.19.12, whichever matches your release line, or a later version.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Linux | Linux | 75ca1e5875fe3f0b9d0e8615c69f49bc2c7fb65d up to, but not including, 79b7e588399bb55f4c10bea6ca41b6c3b944d2bb; 75ca1e5875fe3f0b9d0e8615c69f49bc2c7fb65d up to, but not including, 6999b4769e2a61c463158927102e8c07e3f69ba2; 75ca1e5875fe3f0b9d0e8615c69f49bc2c7fb65d up to, but not including, 0e211f6aaa6a00fd0ee0c1eea5498f168c6725e6; 6.17 | 79b7e588399bb55f4c10bea6ca41b6c3b944d2bb, 6999b4769e2a61c463158927102e8c07e3f69ba2, 0e211f6aaa6a00fd0ee0c1eea5498f168c6725e6 |
| Linux | Linux Kernel | 6.17.1 up to, but not including, 6.18.22; 6.19 up to, but not including, 6.19.12; 6.17; 7.0 | 6.18.22, 6.19.12 |
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: hwmon: (tps53679) Fix array access with zero-length block read i2c_smbus_read_block_data() can return 0, indicating a zero-length read. When this happens, tps53679_identify_chip() accesses buf[ret - 1] which is buf[-1], reading one byte before the buffer on the stack. Fix by changing the check from "ret < 0" to "ret <= 0", treating a zero-length read as an error (-EIO), which prevents the out-of-bounds array access. Also fix a typo in the adjacent comment: "if present" instead of duplicate "if".
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
- 8.1 High severity
- 8.8 High severity
- 7.1 High severity
- 7.3 High severity
- 7.1 High severity
- 7.1 High severity
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