Linux: Access of Resource Using Incompatible Type
CVE-2026-43062 is a high-severity access of resource using incompatible type vulnerability in Linux, with a CVSS 3.1 base score of 7.1 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 21d3ba696918d6373233aac0b9d51fcabdedddc0, 3b94e62caa1dc1198d0d55d97bd710da1dee15d7, 111f74547eee8cfedfb854284e80f35c8a491186 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 0.22% 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 21d3ba696918d6373233aac0b9d51fcabdedddc0 or 3b94e62caa1dc1198d0d55d97bd710da1dee15d7 or 111f74547eee8cfedfb854284e80f35c8a491186 or dd3b221e21079ade8263fbb7176f3d55ad75d3b6, whichever matches your release line, or a later version.
- Update Linux Kernel to 5.10.253 or 5.15.203 or 6.1.167 or 6.6.130, whichever matches your release line, or a later version.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Linux | Linux | 15f02b91056253e8cdc592888f431da0731337b8 up to, but not including, 21d3ba696918d6373233aac0b9d51fcabdedddc0; 15f02b91056253e8cdc592888f431da0731337b8 up to, but not including, 3b94e62caa1dc1198d0d55d97bd710da1dee15d7; 15f02b91056253e8cdc592888f431da0731337b8 up to, but not including, 111f74547eee8cfedfb854284e80f35c8a491186; 15f02b91056253e8cdc592888f431da0731337b8 up to, but not including, dd3b221e21079ade8263fbb7176f3d55ad75d3b6; 15f02b91056253e8cdc592888f431da0731337b8 up to, but not including, d90150c72d2e6a8a3079e88755dafcfbe91c746d; 15f02b91056253e8cdc592888f431da0731337b8 up to, but not including, 5a1ea296f8589ce8f1e3141b2b123b34ad010e19; 15f02b91056253e8cdc592888f431da0731337b8 up to, but not including, f110b8f58b254bf997cec1bd60701b7798e9bb82; 15f02b91056253e8cdc592888f431da0731337b8 up to, but not including, 15145675690cab2de1056e7ed68e59cbd0452529; and 1 more ranges | 21d3ba696918d6373233aac0b9d51fcabdedddc0, 3b94e62caa1dc1198d0d55d97bd710da1dee15d7, 111f74547eee8cfedfb854284e80f35c8a491186, dd3b221e21079ade8263fbb7176f3d55ad75d3b6, d90150c72d2e6a8a3079e88755dafcfbe91c746d, 5a1ea296f8589ce8f1e3141b2b123b34ad010e19 |
| Linux | Linux Kernel | 5.7 up to, but not including, 5.10.253; 5.11 up to, but not including, 5.15.203; 5.16 up to, but not including, 6.1.167; 6.2 up to, but not including, 6.6.130; 6.7 up to, but not including, 6.12.78; 6.13 up to, but not including, 6.18.20; 6.19 up to, but not including, 6.19.10; 7.0 | 5.10.253, 5.15.203, 6.1.167, 6.6.130, 6.12.78, 6.18.20 |
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
- NoneNo data is disclosed.
- Integrity
- HighData or code can be modified at will.
- Availability
- LowPerformance or availability is reduced.
Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L. Scored by CNA.
Official description
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix type confusion in l2cap_ecred_reconf_rsp() l2cap_ecred_reconf_rsp() casts the incoming data to struct l2cap_ecred_conn_rsp (the ECRED *connection* response, 8 bytes with result at offset 6) instead of struct l2cap_ecred_reconf_rsp (2 bytes with result at offset 0). This causes two problems: - The sizeof(*rsp) length check requires 8 bytes instead of the correct 2, so valid L2CAP_ECRED_RECONF_RSP packets are rejected with -EPROTO. - rsp->result reads from offset 6 instead of offset 0, returning wrong data when the packet is large enough to pass the check. Fix by using the correct type. Also pass the already byte-swapped result variable to BT_DBG instead of the raw __le16 field.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Access of Resource Using Incompatible Type
The product allocates or initializes a resource such as a pointer, object, or variable using one type, but it later accesses that resource using a type that is incompatible with the original type.
More Access of Resource Using Incompatible Type vulnerabilities (CWE-843)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Patches and release notes
- git.kernel.org/stable/c/111f74547eee8cfedfb854284e80f35c8a491186
- git.kernel.org/stable/c/15145675690cab2de1056e7ed68e59cbd0452529
- git.kernel.org/stable/c/21d3ba696918d6373233aac0b9d51fcabdedddc0
- git.kernel.org/stable/c/3b94e62caa1dc1198d0d55d97bd710da1dee15d7
- git.kernel.org/stable/c/5a1ea296f8589ce8f1e3141b2b123b34ad010e19
- git.kernel.org/stable/c/d90150c72d2e6a8a3079e88755dafcfbe91c746d
- git.kernel.org/stable/c/dd3b221e21079ade8263fbb7176f3d55ad75d3b6
- git.kernel.org/stable/c/f110b8f58b254bf997cec1bd60701b7798e9bb82
Recent Access of Resource Using Incompatible Type vulnerabilities
- 8.8 High severity
- 7.5 High severity
- 7.8 High severity
- 8.8 High severity
- 8.8 High severity
- 8.8 High severity
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