Answer in brief
CVE-2021-47137 records a Critical severity (CVSS 9.8) vulnerability in net: lantiq: fix memory corruption in RX ring. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), linux/linux_kernel (generic), linux/linux_kernel (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 9.8. 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), linux/linux_kernel (generic), linux/linux_kernel (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:5.13:rc1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:5.13:rc2:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:5.13:rc3:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=fe1a56420cf2ec28c8eceef672b87de0bbe1a260 <8bb1077448d43a871ed667520763e3b9f9b7975d || >=fe1a56420cf2ec28c8eceef672b87de0bbe1a260 <5ac72351655f8b033a2935646f53b7465c903418 || >=fe1a56420cf2ec28c8eceef672b87de0bbe1a260 <46dd4abced3cb2c912916f4a5353e0927db0c4a2 || >=fe1a56420cf2ec28c8eceef672b87de0bbe1a260 <c7718ee96dbc2f9c5fc3b578abdf296dd44b9c20 | 8bb1077448d43a871ed667520763e3b9f9b7975d, 5ac72351655f8b033a2935646f53b7465c903418, 46dd4abced3cb2c912916f4a5353e0927db0c4a2, c7718ee96dbc2f9c5fc3b578abdf296dd44b9c20 |
| Linux/Linuxgeneric | 4.20 | Not reported |
| linux/linux_kernelgeneric | >=fe1a56420cf2 <8bb1077448d4 || >=fe1a56420cf2 <5ac72351655f || >=fe1a56420cf2 <46dd4abced3c || >=fe1a56420cf2 <c7718ee96dbc || 4.20 || 0 || 5.4.124 || 5.10.42 || 5.12.9 || 5.13 | 8bb1077448d4, 5ac72351655f, 46dd4abced3c, c7718ee96dbc |
| linux/linux_kernelgeneric | >=fe1a56420cf2 <8bb1077448d4 || >=fe1a56420cf2 <5ac72351655f || >=fe1a56420cf2 <46dd4abced3c || >=fe1a56420cf2 <c7718ee96dbc || 4.20 || >=0 <=4.20 || >=5.4.124 <=5.4* || >=5.10.42 <=5.10* || >=5.12.9 <=5.12* || >=5.13 <=* | 8bb1077448d4, 5ac72351655f, 46dd4abced3c, c7718ee96dbc |
Published upstream
Mar 25, 2024
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 4, 2026
In the Linux kernel, the following vulnerability has been resolved: net: lantiq: fix memory corruption in RX ring In a situation where memory allocation or dma mapping fails, an invalid address is programmed into the descriptor. This can lead to memory corruption. If the memory allocation fails, DMA should reuse the previous skb and mapping and drop the packet. This patch also increments rx drop counter.
Quoted source text, attributed separately from HOL analysis.