Answer in brief
CVE-2026-63999 records a Medium severity (CVSS 5.5) vulnerability in ethtool: rss: fix indir_table and hkey leak on get_rxfh failure. 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 5.5. 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:6.15:-:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.15:rc2:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.15:rc3:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.15:rc4:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.15:rc5:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.15:rc6:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.15:rc7:*:*:*:*:*:* | 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 | >=c5ed0eaddcbda56079091fc3876b140a6e70a548 <14dbf22c397b799b3a80f63fc90c2fc0585bbeb3 || >=a065b996052656a65afc51ad82336dc55ae4c72f <323faef6366349f57d4ad67d318a0c8906e360b3 || >=4f038a6a02d20859a3479293cbf172b0f14cbdd6 <33d05c22d6f227c5ae171c46df2f6f8bf48047ea || >=4f038a6a02d20859a3479293cbf172b0f14cbdd6 <80d95d92f828cfcace955d673637d944178b435f || >=4f038a6a02d20859a3479293cbf172b0f14cbdd6 <266297692f97008ca48bc311775c087c59bd7fe3 || 81a5174e64ce4fb7b7a2f6499b835c904c9451ee || ec9faff49a4ea27731de39cb887b7e590e93157b || adee9db710a6117b978a25ed4153846b7c56ec9a || 5eb3fdc4b6281b29e830300c866a36d90442b1f0 || >=6.6.88 <6.6.160 || >=6.12.24 <6.12.114 || >=5.15.181 <5.16 || >=6.1.135 <6.2 || >=6.13.12 <6.14 || >=6.14.3 <6.15 | 14dbf22c397b799b3a80f63fc90c2fc0585bbeb3, 323faef6366349f57d4ad67d318a0c8906e360b3, 33d05c22d6f227c5ae171c46df2f6f8bf48047ea, 80d95d92f828cfcace955d673637d944178b435f, 266297692f97008ca48bc311775c087c59bd7fe3, 6.6.160, 6.12.114, 5.16, 6.2, 6.14, 6.15 |
| Linux/Linuxgeneric | 6.15 | Not reported |
Published upstream
Jul 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 21, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 16, 2026
In the Linux kernel, the following vulnerability has been resolved: ethtool: rss: fix indir_table and hkey leak on get_rxfh failure rss_prepare_get() allocates the indirection table and hash key buffer via rss_get_data_alloc(), then calls ops->get_rxfh() to populate them. If get_rxfh() fails, the function returns an error without freeing the allocation.
Quoted source text, attributed separately from HOL analysis.