Answer in brief
CVE-2026-63987 records a High severity (CVSS 7.8) vulnerability in ethtool: coalesce: cap profile updates at NET_DIM_PARAMS_NUM_PROFILES. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.1:rc5:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=f750dfe825b904164688adeb147950e0e0c4d262 <d4c9cc7c47781c6f4fa29d80a1193a8bcd1525bc || >=f750dfe825b904164688adeb147950e0e0c4d262 <0c02c190bcd9822477038ff2cee10ea584ac1b1d || >=f750dfe825b904164688adeb147950e0e0c4d262 <6205f7166d2dd14a017a5802c81e5bd1421a8635 || >=f750dfe825b904164688adeb147950e0e0c4d262 <7281b096b072f6c6e30420e3467d738f2e4c4b57 | d4c9cc7c47781c6f4fa29d80a1193a8bcd1525bc, 0c02c190bcd9822477038ff2cee10ea584ac1b1d, 6205f7166d2dd14a017a5802c81e5bd1421a8635, 7281b096b072f6c6e30420e3467d738f2e4c4b57 |
| Linux/Linuxgeneric | 6.11 | Not reported |
Published upstream
Jul 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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).
Quoted source text, attributed separately from HOL analysis.