CVE-2023-54065 (GCVE-0-2023-54065)

Vulnerability from cvelistv5 – Published: 2025-12-24 12:23 – Updated: 2025-12-24 12:23
VLAI?
Title
net: dsa: realtek: fix out-of-bounds access
Summary
In the Linux kernel, the following vulnerability has been resolved: net: dsa: realtek: fix out-of-bounds access The probe function sets priv->chip_data to (void *)priv + sizeof(*priv) with the expectation that priv has enough trailing space. However, only realtek-smi actually allocated this chip_data space. Do likewise in realtek-mdio to fix out-of-bounds accesses. These accesses likely went unnoticed so far, because of an (unused) buf[4096] member in struct realtek_priv, which caused kmalloc to round up the allocated buffer to a big enough size, so nothing of value was overwritten. With a different allocator (like in the barebox bootloader port of the driver) or with KASAN, the memory corruption becomes quickly apparent.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: aac94001067da183455d6d37959892744fa01d9d , < cc0f9bb99735d2b68fac68f37b585d615728ce5b (git)
Affected: aac94001067da183455d6d37959892744fa01d9d , < fe668aa499b4b95425044ba11af9609db6ecf466 (git)
Affected: aac94001067da183455d6d37959892744fa01d9d , < b93eb564869321d0dffaf23fcc5c88112ed62466 (git)
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    Linux Linux Affected: 5.18
Unaffected: 0 , < 5.18 (semver)
Unaffected: 6.1.23 , ≤ 6.1.* (semver)
Unaffected: 6.2.10 , ≤ 6.2.* (semver)
Unaffected: 6.3 , ≤ * (original_commit_for_fix)
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            "drivers/net/dsa/realtek/realtek-mdio.c"
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    "dateReserved": "2025-12-24T12:21:05.092Z",
    "dateUpdated": "2025-12-24T12:23:10.745Z",
    "state": "PUBLISHED"
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}


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