CVE-2021-47586 (GCVE-0-2021-47586)

Vulnerability from cvelistv5 – Published: 2024-06-19 14:53 – Updated: 2025-05-04 07:14
VLAI?
Title
net: stmmac: dwmac-rk: fix oob read in rk_gmac_setup
Summary
In the Linux kernel, the following vulnerability has been resolved: net: stmmac: dwmac-rk: fix oob read in rk_gmac_setup KASAN reports an out-of-bounds read in rk_gmac_setup on the line: while (ops->regs[i]) { This happens for most platforms since the regs flexible array member is empty, so the memory after the ops structure is being read here. It seems that mostly this happens to contain zero anyway, so we get lucky and everything still works. To avoid adding redundant data to nearly all the ops structures, add a new flag to indicate whether the regs field is valid and avoid this loop when it is not.
Severity ?
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 3bb3d6b1c1957e88bfc5e77a4557f7e6ba761fe3 , < 0b4a5d1e15ce72f69be48f38dc0401dab890ae0f (git)
Affected: 3bb3d6b1c1957e88bfc5e77a4557f7e6ba761fe3 , < 0546b224cc7717cc8a2db076b0bb069a9c430794 (git)
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    Linux Linux Affected: 5.14
Unaffected: 0 , < 5.14 (semver)
Unaffected: 5.15.11 , ≤ 5.15.* (semver)
Unaffected: 5.16 , ≤ * (original_commit_for_fix)
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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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