Linux: Out-of-bounds Read
CVE-2026-53330 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 7b310c6d82d782282085c9728dfe69e07d185b6c, a632474c793b7f2a9bbd3d8e3d0dd7d256989300, 7c5f2d16a8f4464bf2a719ceb2316b8a6b87a3c0 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 0.13% 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 7b310c6d82d782282085c9728dfe69e07d185b6c or a632474c793b7f2a9bbd3d8e3d0dd7d256989300 or 7c5f2d16a8f4464bf2a719ceb2316b8a6b87a3c0 or 454d3b3d499c18373f8960d31aea48338a3ca9e0, whichever matches your release line, or a later version.
- Update Linux Kernel to 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 | 8e5100a575433cc185a2e224280fbd873b6692dd up to, but not including, 7b310c6d82d782282085c9728dfe69e07d185b6c; 8e5100a575433cc185a2e224280fbd873b6692dd up to, but not including, a632474c793b7f2a9bbd3d8e3d0dd7d256989300; 8e5100a575433cc185a2e224280fbd873b6692dd up to, but not including, 7c5f2d16a8f4464bf2a719ceb2316b8a6b87a3c0; 8e5100a575433cc185a2e224280fbd873b6692dd up to, but not including, 454d3b3d499c18373f8960d31aea48338a3ca9e0; 8e5100a575433cc185a2e224280fbd873b6692dd up to, but not including, dc1490927d79fe9621e29f4a4f5d7b5ccb6aea3e; 8e5100a575433cc185a2e224280fbd873b6692dd up to, but not including, e8b4d37eba05141ee01794fc6b7f2da808cee83b; 5.6 | 7b310c6d82d782282085c9728dfe69e07d185b6c, a632474c793b7f2a9bbd3d8e3d0dd7d256989300, 7c5f2d16a8f4464bf2a719ceb2316b8a6b87a3c0, 454d3b3d499c18373f8960d31aea48338a3ca9e0, dc1490927d79fe9621e29f4a4f5d7b5ccb6aea3e, e8b4d37eba05141ee01794fc6b7f2da808cee83b |
| Linux | Linux Kernel | 5.6 up to, but not including, 6.18.36; 6.19 up to, but not including, 7.0.13; 7.1 | 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: drm/amd/display: Fix out-of-bounds read in dp_get_eq_aux_rd_interval() [Why & How] The aux_rd_interval array in struct dc_lttpr_caps is declared with MAX_REPEATER_CNT - 1 (7) elements, indexed 0..6. However, the offset parameter passed to dp_get_eq_aux_rd_interval() can be as large as MAX_REPEATER_CNT (8) when a sink reports 8 LTTPR repeaters via DPCD. This leads to an out-of-bounds read of aux_rd_interval[7] when offset is 8. Fix this by growing aux_rd_interval to MAX_REPEATER_CNT elements to accommodate the full range of valid repeater counts defined by the DP spec. (cherry picked from commit a55a458a8df37a65ffda5cf721d554a8f74f6b04)
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
Other references
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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