CVE-2026-53400
i2c: core: fix adapter registration race
In the Linux kernel, the following vulnerability has been resolved: i2c: core: fix adapter registration race Adapters can be looked up based on their id using i2c_get_adapter() which takes a reference to the embedded struct device. Make sure that the adapter (including its struct device) has been initialised before adding it to the IDR to avoid accessing uninitialised data which could, for example, lead to NULL-pointer dereferences or use-after-free. Note that the i2c-dev chardev, which is registered from a bus notifier, currently uses i2c_get_adapter() so the adapter needs to be added to the IDR before registration.
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| Linux Linux |
≥ 6e13e641841833cc2aa5baefe89bb04bc388801b; < 2e57c788e71f1763445f812eba4e0b4a2fbd0646 (affected, git) ≥ 6e13e641841833cc2aa5baefe89bb04bc388801b; < a4365bc41baaf67f3a5aa8556d23544e6ec7480a (affected, git) ≥ 6e13e641841833cc2aa5baefe89bb04bc388801b; < 1febb174815bcae56d73587e99e8f87e02f0784d (affected, git) ≥ 6e13e641841833cc2aa5baefe89bb04bc388801b; < da9d8d9711f78deebc202d0cffcf577e45ee8621 (affected, git) ≥ 6e13e641841833cc2aa5baefe89bb04bc388801b; < 78793c75dc6d0ff2e4d50ad617349b328a99054e (affected, git) ≥ 6e13e641841833cc2aa5baefe89bb04bc388801b; < 6a946038f2a5a8c29048c6af369d4e391448a5c5 (affected, git) ≥ 6e13e641841833cc2aa5baefe89bb04bc388801b; < a4c8094bbf4c6fa68b17e3b16f6a0a1b7a14f3e0 (affected, git) ≥ 6e13e641841833cc2aa5baefe89bb04bc388801b; < ba14d7cf2fe7284610a29854bdff22b2537d3ce6 (affected, git) Other versions: unaffected |
CNA: Linux |
| Linux Linux |
2.6.22 (affected) ≥ 0; < 2.6.22 (unaffected, semver) ≥ 5.10.261; ≤ 5.10.* (unaffected, semver) ≥ 5.15.212; ≤ 5.15.* (unaffected, semver) ≥ 6.1.178; ≤ 6.1.* (unaffected, semver) ≥ 6.6.145; ≤ 6.6.* (unaffected, semver) ≥ 6.12.95; ≤ 6.12.* (unaffected, semver) ≥ 6.18.38; ≤ 6.18.* (unaffected, semver) ≥ 7.1.3; ≤ 7.1.* (unaffected, semver) ≥ 7.2; ≤ * (unaffected, original_commit_for_fix) Other versions: affected |
CNA: Linux |
| SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0) Siemens |
≥ V3.1.6; < * (affected, custom)
Other versions: unknown |
ADP: siemens-SADP |
| SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0) Siemens |
≥ V3.1.7; < * (affected, custom)
Other versions: unknown |
ADP: siemens-SADP |
| SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0) Siemens |
≥ V3.1.6; < * (affected, custom)
Other versions: unknown |
ADP: siemens-SADP |
| SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0) Siemens |
≥ V3.1.7; < * (affected, custom)
Other versions: unknown |
ADP: siemens-SADP |
| SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0) Siemens |
≥ V3.1.6; < * (affected, custom)
Other versions: unknown |
ADP: siemens-SADP |
| SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0) Siemens |
≥ V3.1.7; < * (affected, custom)
Other versions: unknown |
ADP: siemens-SADP |
| SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0) Siemens |
≥ V3.1.6; < * (affected, custom)
Other versions: unknown |
ADP: siemens-SADP |
| SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0) Siemens |
≥ V3.1.7; < * (affected, custom)
Other versions: unknown |
ADP: siemens-SADP |
| SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0) Siemens |
≥ V3.1.6; < * (affected, custom)
Other versions: unknown |
ADP: siemens-SADP |
| SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0) Siemens |
≥ V3.1.7; < * (affected, custom)
Other versions: unknown |
ADP: siemens-SADP |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 3.1 / 7.8 high |
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | CNA: Linux |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://git.kernel.org/stable/c/2e57c788e71f1763445f812eba4e0b4a2fbd0646CNA: Linux
- https://git.kernel.org/stable/c/a4365bc41baaf67f3a5aa8556d23544e6ec7480aCNA: Linux
- https://git.kernel.org/stable/c/1febb174815bcae56d73587e99e8f87e02f0784dCNA: Linux
- https://git.kernel.org/stable/c/da9d8d9711f78deebc202d0cffcf577e45ee8621CNA: Linux
- https://git.kernel.org/stable/c/78793c75dc6d0ff2e4d50ad617349b328a99054eCNA: Linux
- https://git.kernel.org/stable/c/6a946038f2a5a8c29048c6af369d4e391448a5c5CNA: Linux
- https://git.kernel.org/stable/c/a4c8094bbf4c6fa68b17e3b16f6a0a1b7a14f3e0CNA: Linux
- https://git.kernel.org/stable/c/ba14d7cf2fe7284610a29854bdff22b2537d3ce6CNA: Linux
- https://cert-portal.siemens.com/productcert/html/ssa-019113.htmlADP: siemens-SADP
- https://cert-portal.siemens.com/productcert/html/ssa-457936.htmlADP: siemens-SADP
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