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CVE-2026-63987

ethtool: coalesce: cap profile updates at NET_DIM_PARAMS_NUM_PROFILES

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 6.12.93, 6.18.35, 7.0.12
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: no
  • Technical impact: total

Summary

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).

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: no · Technical impact: total

  3. Record last updated

Affected versions

  • Linux Linux

    From f750dfe825b904164688adeb147950e0e0c4d262 · fixed in d4c9cc7c47781c6f4fa29d80a1193a8bcd1525bc; From f750dfe825b904164688adeb147950e0e0c4d262 · fixed in 0c02c190bcd9822477038ff2cee10ea584ac1b1d; From f750dfe825b904164688adeb147950e0e0c4d262 · fixed in 6205f7166d2dd14a017a5802c81e5bd1421a8635; From f750dfe825b904164688adeb147950e0e0c4d262 · fixed in 7281b096b072f6c6e30420e3467d738f2e4c4b57

  • Linux Linux

    6.11

  • KernelLinux

    From 6.11.0 · fixed in 6.12.93; From 6.13.0 · fixed in 6.18.35; From 6.19.0 · fixed in 7.0.12

References 4

git.kernel.org