{"id":"CVE-2026-93125","aliases":[],"cve":{"records":[{"id":"CVE-2026-93125","source":"Linux","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-09-17T16:02:15.087Z","published":"2026-09-17T16:11:29.895Z","modified":"2026-10-30T12:36:03.562Z"}],"publishers":[{"name":"Linux","role":"CNA","organizationId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","modified":"2026-10-30T12:36:03.562Z"}],"references":[{"url":"https://git.kernel.org/stable/c/00bb52be60da16cd5ead4eb9f8ddc9a66d003ff2","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/2147065d3a4e1d5d42ae553fef165f17ec5e0e79","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/b6ac0b5732047d43172b9dfbe6b57b9b8de303c2","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/93a20b14f8627b2d3486e3ec1d3f2e7275a506ec","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/56a3846830ac95a472297d0cbba75cbff29540bb","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/2aaf67f0516fde29620d0edfc29c01b9ea7ad430","tags":[],"source":"Linux"}],"weaknesses":[],"applicability":[{"source":"Linux","statements":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1","versionEndExcluding":"6.1.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1","versionEndExcluding":"6.6.160"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1","versionEndExcluding":"6.12.114"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1","versionEndExcluding":"6.18.57"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1","versionEndExcluding":"7.2.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1","versionEndExcluding":"7.3"}]}]}]}],"prioritization":[]},"title":"bpf: Reject rdonly/rdwr_buf_size kfunc arguments that exceed u32 max","titleSource":"Linux","descriptionSource":"Linux","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Reject rdonly/rdwr_buf_size kfunc arguments that exceed u32 max\n\ncheck_kfunc_args() detects a kfunc argument named rdonly_buf_size or\nrdwr_buf_size and stores reg->var_off.value into meta->r0_size, a u64,\nand does not bound it. check_kfunc_call() later copies that value into\nthe returned register's mem_size field:\n\n  meta->r0_size = reg->var_off.value;\n  ...\n  regs[BPF_REG_0].mem_size = meta.r0_size;\n\nregs[BPF_REG_0].mem_size is u32. A constant whose upper 32 bits are set\ngets truncated instead of causing a load-time rejection, so the verifier\nrecords a PTR_TO_MEM register with an approximately 4 GiB mem_size for\nwhatever allocation the kfunc returned. A later access check against\nthat register uses the truncated, wrong bound.\n\nReject rdonly_buf_size/rdwr_buf_size values that exceed U32_MAX at the\npoint meta->r0_size is set.","score":7.8,"severity":"high","published":"2026-09-17T16:11:29.895Z","modified":"2026-10-30T12:36:03.562Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"Linux","name":"Linux","platforms":[],"versions":[{"version":"eb1f7f71c126c8fd50ea81af98f97c4b581ea4ae","status":"affected","lessThan":"00bb52be60da16cd5ead4eb9f8ddc9a66d003ff2","versionType":"git"},{"version":"eb1f7f71c126c8fd50ea81af98f97c4b581ea4ae","status":"affected","lessThan":"2147065d3a4e1d5d42ae553fef165f17ec5e0e79","versionType":"git"},{"version":"eb1f7f71c126c8fd50ea81af98f97c4b581ea4ae","status":"affected","lessThan":"b6ac0b5732047d43172b9dfbe6b57b9b8de303c2","versionType":"git"},{"version":"eb1f7f71c126c8fd50ea81af98f97c4b581ea4ae","status":"affected","lessThan":"93a20b14f8627b2d3486e3ec1d3f2e7275a506ec","versionType":"git"},{"version":"eb1f7f71c126c8fd50ea81af98f97c4b581ea4ae","status":"affected","lessThan":"56a3846830ac95a472297d0cbba75cbff29540bb","versionType":"git"},{"version":"eb1f7f71c126c8fd50ea81af98f97c4b581ea4ae","status":"affected","lessThan":"2aaf67f0516fde29620d0edfc29c01b9ea7ad430","versionType":"git"}],"defaultStatus":"unaffected","cpes":[],"source":"Linux","url":"https://www.cve.org/CVERecord?id=CVE-2026-93125"},{"vendor":"Linux","name":"Linux","platforms":[],"versions":[{"version":"6.1","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.1","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.114","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.57","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.6","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"defaultStatus":"affected","cpes":[],"source":"Linux","url":"https://www.cve.org/CVERecord?id=CVE-2026-93125"}],"remediation":[],"references":["https://git.kernel.org/stable/c/00bb52be60da16cd5ead4eb9f8ddc9a66d003ff2","https://git.kernel.org/stable/c/2147065d3a4e1d5d42ae553fef165f17ec5e0e79","https://git.kernel.org/stable/c/b6ac0b5732047d43172b9dfbe6b57b9b8de303c2","https://git.kernel.org/stable/c/93a20b14f8627b2d3486e3ec1d3f2e7275a506ec","https://git.kernel.org/stable/c/56a3846830ac95a472297d0cbba75cbff29540bb","https://git.kernel.org/stable/c/2aaf67f0516fde29620d0edfc29c01b9ea7ad430"],"sources":[{"name":"CVE","id":"CVE-2026-93125","modified":"2026-10-30T12:36:03.562Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-93125"}],"assessments":[{"source":"Linux","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8}],"sourceAffected":[],"observedAt":"2026-10-30T13:55:05.883Z","kev":{"status":"not-listed","checkedAt":"2026-11-15T00:40:33.739Z"},"coverage":[{"source":"NVD","status":"not-checked"},{"source":"GHSA","status":"not-checked"},{"source":"EUVD","status":"not-checked"},{"source":"EPSS","status":"not-checked"}],"evidence":[],"aiSummary":null}