In the Linux kernel, the following vulnerability has been resolved: ethtool: coalesce: cap profile updates at NET_DIM_PARAMS_NUM_PROFILES ethnl_update_profile() walks the ETHTOOL_A_PROFILE_IRQ_MODERATION nest list with an index 'i' and writes new_profile[i++] without bounding i. The destination is kmemdup()'d at NET_DIM_PARAMS_NUM_PROFILES entries (5), but the Netlink nest count is entirely user-controlled. Netlink policies do not have support for constraining the number of nested entries (or number of multi-attr entries).
Fix
Patch, vendor advisory and mitigation references on NVD 4
- https://git.kernel.org/stable/c/0c02c190bcd9822477038ff2cee10ea584ac1b1d Patch
- https://git.kernel.org/stable/c/6205f7166d2dd14a017a5802c81e5bd1421a8635 Patch
- https://git.kernel.org/stable/c/7281b096b072f6c6e30420e3467d738f2e4c4b57 Patch
- https://git.kernel.org/stable/c/d4c9cc7c47781c6f4fa29d80a1193a8bcd1525bc Patch
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 2
- StatusAnalyzed → ModifiedNVD modified 2026-10-19 21:17
- First seenCVSS 7.8 · linuxNVD modified 2026-10-08 14:46
Affected (CPE criteria) 6
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:7.1:rc5:*:*:*:*:*:*
References 4
- https://git.kernel.org/stable/c/0c02c190bcd9822477038ff2cee10ea584ac1b1d Patch
- https://git.kernel.org/stable/c/6205f7166d2dd14a017a5802c81e5bd1421a8635 Patch
- https://git.kernel.org/stable/c/7281b096b072f6c6e30420e3467d738f2e4c4b57 Patch
- https://git.kernel.org/stable/c/d4c9cc7c47781c6f4fa29d80a1193a8bcd1525bc Patch