Answer in brief
CVE-2021-46974 records a High severity (CVSS 7.1) vulnerability in bpf: Fix masking negation logic upon negative dst register. 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.
Answer in brief
CVE-2021-46974 records a High severity (CVSS 7.1) vulnerability in bpf: Fix masking negation logic upon negative dst register. 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 7.1. 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 |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=ae03b6b1c880a03d4771257336dc3bca156dd51b <4d542ddb88fb2f39bf7f14caa2902f3e8d06f6ba || >=f92a819b4cbef8c9527d9797110544b2055a4b96 <0e2dfdc74a7f4036127356d42ea59388f153f42c || >=979d63d50c0c0f7bc537bf821e056cc9fe5abd38 <53e0db429b37a32b8fc706d0d90eb4583ad13848 || >=979d63d50c0c0f7bc537bf821e056cc9fe5abd38 <2cfa537674cd1051a3b8111536d77d0558f33d5d || >=979d63d50c0c0f7bc537bf821e056cc9fe5abd38 <6eba92a4d4be8feb4dc33976abac544fa99d6ecc || >=979d63d50c0c0f7bc537bf821e056cc9fe5abd38 <7cf64d8679ca1cb20cf57d6a88bfee79a0922a66 || >=979d63d50c0c0f7bc537bf821e056cc9fe5abd38 <b9b34ddbe2076ade359cd5ce7537d5ed019e9807 || 078da99d449f64ca04d459cdbdcce513b64173cd || >=4.14.113 <4.14.233 || >=4.19.19 <4.19.190 || >=4.20.6 <4.21 | 4d542ddb88fb2f39bf7f14caa2902f3e8d06f6ba, 0e2dfdc74a7f4036127356d42ea59388f153f42c, 53e0db429b37a32b8fc706d0d90eb4583ad13848, 2cfa537674cd1051a3b8111536d77d0558f33d5d, 6eba92a4d4be8feb4dc33976abac544fa99d6ecc, 7cf64d8679ca1cb20cf57d6a88bfee79a0922a66, b9b34ddbe2076ade359cd5ce7537d5ed019e9807, 4.14.233, 4.19.190, 4.21 |
| Linux/Linuxgeneric | 5.0 | Not reported |
Published upstream
Feb 27, 2024
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 4, 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: bpf: Fix masking negation logic upon negative dst register The negation logic for the case where the off_reg is sitting in the dst register is not correct given then we cannot just invert the add to a sub or vice versa. As a fix, perform the final bitwise and-op unconditionally into AX from the off_reg, then move the pointer from the src to dst and finally use AX as the source for the original pointer arithmetic operation such that the inversion yields a correct result. The single non-AX mov in between is possible given constant blinding is retaining it as it's not an immediate based operation.
Quoted source text, attributed separately from HOL analysis.
CVSS is 7.1. 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 |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=ae03b6b1c880a03d4771257336dc3bca156dd51b <4d542ddb88fb2f39bf7f14caa2902f3e8d06f6ba || >=f92a819b4cbef8c9527d9797110544b2055a4b96 <0e2dfdc74a7f4036127356d42ea59388f153f42c || >=979d63d50c0c0f7bc537bf821e056cc9fe5abd38 <53e0db429b37a32b8fc706d0d90eb4583ad13848 || >=979d63d50c0c0f7bc537bf821e056cc9fe5abd38 <2cfa537674cd1051a3b8111536d77d0558f33d5d || >=979d63d50c0c0f7bc537bf821e056cc9fe5abd38 <6eba92a4d4be8feb4dc33976abac544fa99d6ecc || >=979d63d50c0c0f7bc537bf821e056cc9fe5abd38 <7cf64d8679ca1cb20cf57d6a88bfee79a0922a66 || >=979d63d50c0c0f7bc537bf821e056cc9fe5abd38 <b9b34ddbe2076ade359cd5ce7537d5ed019e9807 || 078da99d449f64ca04d459cdbdcce513b64173cd || >=4.14.113 <4.14.233 || >=4.19.19 <4.19.190 || >=4.20.6 <4.21 | 4d542ddb88fb2f39bf7f14caa2902f3e8d06f6ba, 0e2dfdc74a7f4036127356d42ea59388f153f42c, 53e0db429b37a32b8fc706d0d90eb4583ad13848, 2cfa537674cd1051a3b8111536d77d0558f33d5d, 6eba92a4d4be8feb4dc33976abac544fa99d6ecc, 7cf64d8679ca1cb20cf57d6a88bfee79a0922a66, b9b34ddbe2076ade359cd5ce7537d5ed019e9807, 4.14.233, 4.19.190, 4.21 |
| Linux/Linuxgeneric | 5.0 | Not reported |
Published upstream
Feb 27, 2024
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 4, 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: bpf: Fix masking negation logic upon negative dst register The negation logic for the case where the off_reg is sitting in the dst register is not correct given then we cannot just invert the add to a sub or vice versa. As a fix, perform the final bitwise and-op unconditionally into AX from the off_reg, then move the pointer from the src to dst and finally use AX as the source for the original pointer arithmetic operation such that the inversion yields a correct result. The single non-AX mov in between is possible given constant blinding is retaining it as it's not an immediate based operation.
Quoted source text, attributed separately from HOL analysis.