Answer in brief
CVE-2026-93125 records a High severity (CVSS 7.8) vulnerability in bpf: Reject rdonly/rdwr_buf_size kfunc arguments that exceed u32 max. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic) and additional mapped packages. 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), Linux/Linux (generic), Linux/Linux (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=eb1f7f71c126c8fd50ea81af98f97c4b581ea4ae <56a3846830ac95a472297d0cbba75cbff29540bb || >=eb1f7f71c126c8fd50ea81af98f97c4b581ea4ae <2aaf67f0516fde29620d0edfc29c01b9ea7ad430 | 56a3846830ac95a472297d0cbba75cbff29540bb, 2aaf67f0516fde29620d0edfc29c01b9ea7ad430 |
| Linux/Linuxgeneric | 6.1 | Not reported |
| Linux/Linuxgeneric | >=eb1f7f71c126c8fd50ea81af98f97c4b581ea4ae <93a20b14f8627b2d3486e3ec1d3f2e7275a506ec || >=eb1f7f71c126c8fd50ea81af98f97c4b581ea4ae <56a3846830ac95a472297d0cbba75cbff29540bb || >=eb1f7f71c126c8fd50ea81af98f97c4b581ea4ae <2aaf67f0516fde29620d0edfc29c01b9ea7ad430 | 93a20b14f8627b2d3486e3ec1d3f2e7275a506ec, 56a3846830ac95a472297d0cbba75cbff29540bb, 2aaf67f0516fde29620d0edfc29c01b9ea7ad430 |
| Linux/Linuxgeneric | >=eb1f7f71c126c8fd50ea81af98f97c4b581ea4ae <2147065d3a4e1d5d42ae553fef165f17ec5e0e79 || >=eb1f7f71c126c8fd50ea81af98f97c4b581ea4ae <b6ac0b5732047d43172b9dfbe6b57b9b8de303c2 || >=eb1f7f71c126c8fd50ea81af98f97c4b581ea4ae <93a20b14f8627b2d3486e3ec1d3f2e7275a506ec || >=eb1f7f71c126c8fd50ea81af98f97c4b581ea4ae <56a3846830ac95a472297d0cbba75cbff29540bb || >=eb1f7f71c126c8fd50ea81af98f97c4b581ea4ae <2aaf67f0516fde29620d0edfc29c01b9ea7ad430 | 2147065d3a4e1d5d42ae553fef165f17ec5e0e79, b6ac0b5732047d43172b9dfbe6b57b9b8de303c2, 93a20b14f8627b2d3486e3ec1d3f2e7275a506ec, 56a3846830ac95a472297d0cbba75cbff29540bb, 2aaf67f0516fde29620d0edfc29c01b9ea7ad430 |
| Linux/Linuxgeneric | >=eb1f7f71c126c8fd50ea81af98f97c4b581ea4ae <00bb52be60da16cd5ead4eb9f8ddc9a66d003ff2 || >=eb1f7f71c126c8fd50ea81af98f97c4b581ea4ae <2147065d3a4e1d5d42ae553fef165f17ec5e0e79 || >=eb1f7f71c126c8fd50ea81af98f97c4b581ea4ae <b6ac0b5732047d43172b9dfbe6b57b9b8de303c2 || >=eb1f7f71c126c8fd50ea81af98f97c4b581ea4ae <93a20b14f8627b2d3486e3ec1d3f2e7275a506ec || >=eb1f7f71c126c8fd50ea81af98f97c4b581ea4ae <56a3846830ac95a472297d0cbba75cbff29540bb || >=eb1f7f71c126c8fd50ea81af98f97c4b581ea4ae <2aaf67f0516fde29620d0edfc29c01b9ea7ad430 | 00bb52be60da16cd5ead4eb9f8ddc9a66d003ff2, 2147065d3a4e1d5d42ae553fef165f17ec5e0e79, b6ac0b5732047d43172b9dfbe6b57b9b8de303c2, 93a20b14f8627b2d3486e3ec1d3f2e7275a506ec, 56a3846830ac95a472297d0cbba75cbff29540bb, 2aaf67f0516fde29620d0edfc29c01b9ea7ad430 |
Published upstream
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 30, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 17, 2026
In the Linux kernel, the following vulnerability has been resolved: bpf: Reject rdonly/rdwr_buf_size kfunc arguments that exceed u32 max check_kfunc_args() detects a kfunc argument named rdonly_buf_size or rdwr_buf_size and stores reg->var_off.value into meta->r0_size, a u64, and does not bound it. check_kfunc_call() later copies that value into the returned register's mem_size field: meta->r0_size = reg->var_off.value; ... regs[BPF_REG_0].mem_size = meta.r0_size; regs[BPF_REG_0].mem_size is u32. A constant whose upper 32 bits are set gets truncated instead of causing a load-time rejection, so the verifier records a PTR_TO_MEM register with an approximately 4 GiB mem_size for whatever allocation the kfunc returned. A later access check against that register uses the truncated, wrong bound. Reject rdonly_buf_size/rdwr_buf_size values that exceed U32_MAX at the point meta->r0_size is set.
Quoted source text, attributed separately from HOL analysis.