Linux: Out-of-bounds Read
CVE-2026-43048 is a high-severity out-of-bounds read vulnerability in Linux, with a CVSS 3.1 base score of 8.8 out of 10. It can be exploited from the same local network by an unauthenticated attacker, without any action from a user. The record lists versions ad4316edbc63949094edeee538517dd689df7b24, 218b93b7e284de1aa40a53f8f130f84f7da38858, b37e6019fe420335d884e30535549a25f084e00d 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 0.32% 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 ad4316edbc63949094edeee538517dd689df7b24 or 218b93b7e284de1aa40a53f8f130f84f7da38858 or b37e6019fe420335d884e30535549a25f084e00d or 8f71034649738fdeb6859b8d6cddf132024fac06, 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 | cd6104572bca9e4afe0dcdb8ecd65ef90b01297b up to, but not including, ad4316edbc63949094edeee538517dd689df7b24; cd6104572bca9e4afe0dcdb8ecd65ef90b01297b up to, but not including, 218b93b7e284de1aa40a53f8f130f84f7da38858; cd6104572bca9e4afe0dcdb8ecd65ef90b01297b up to, but not including, b37e6019fe420335d884e30535549a25f084e00d; cd6104572bca9e4afe0dcdb8ecd65ef90b01297b up to, but not including, 8f71034649738fdeb6859b8d6cddf132024fac06; cd6104572bca9e4afe0dcdb8ecd65ef90b01297b up to, but not including, bd6e1d0230cca9575f5d118148f51e2a56b5373f; cd6104572bca9e4afe0dcdb8ecd65ef90b01297b up to, but not including, 0a3fe972a7cb1404f693d6f1711f32bc1d244b1c; 2.6.15 | ad4316edbc63949094edeee538517dd689df7b24, 218b93b7e284de1aa40a53f8f130f84f7da38858, b37e6019fe420335d884e30535549a25f084e00d, 8f71034649738fdeb6859b8d6cddf132024fac06, bd6e1d0230cca9575f5d118148f51e2a56b5373f, 0a3fe972a7cb1404f693d6f1711f32bc1d244b1c |
| Linux | Linux Kernel | 2.6.15.1 up to, but not including, 6.18.22; 6.19 up to, but not including, 6.19.12; 2.6.15; 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
- AdjacentThe attacker must be on the same local network segment.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- NoneNo account or login is needed.
- 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
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. Scored by CNA.
Official description
In the Linux kernel, the following vulnerability has been resolved: HID: core: Mitigate potential OOB by removing bogus memset() The memset() in hid_report_raw_event() has the good intention of clearing out bogus data by zeroing the area from the end of the incoming data string to the assumed end of the buffer. However, as we have previously seen, doing so can easily result in OOB reads and writes in the subsequent thread of execution. The current suggestion from one of the HID maintainers is to remove the memset() and simply return if the incoming event buffer size is not large enough to fill the associated report. Suggested-by Benjamin Tissoires <[email protected]> [bentiss: changed the return value]
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.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Patches and release notes
Other references
Recent Out-of-bounds Read vulnerabilities
- 8.1 High severity
- 7.1 High severity
- 7.3 High severity
- 7.1 High severity
- 7.1 High severity
- 7.1 High severity
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