{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-37873","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2025-04-16T04:51:23.959Z","datePublished":"2025-05-09T06:44:01.394Z","dateUpdated":"2026-08-05T11:57:58.207Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-05T11:57:58.207Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\neth: bnxt: fix missing ring index trim on error path\n\nCommit under Fixes converted tx_prod to be free running but missed\nmasking it on the Tx error path. This crashes on error conditions,\nfor example when DMA mapping fails."}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:L - The defect is in `bnxt_start_xmit()`, the driver's local transmit path, reached by a local process sending packets through the bnxt interface; it does not parse remote peer data, so a remote attacker cannot directly drive the error path.\nAC:L - The error conditions are resource-exhaustion states the attacker can themselves induce (swiotlb/IOMMU exhaustion for `dma_map_single()`, memory pressure for `skb_pad()`/`skb_cow_head()`), and `tx_prod` exceeds `tx_ring_mask` ~99.2% of the time and is steerable by simply sending packets.\nPR:L - Any unprivileged local user can transmit packets out the bnxt NIC via ordinary sockets and generate the memory/DMA pressure needed; no capability, netlink permission, or admin gate exists on this path.\nUI:N - The OOB write occurs entirely within the attacker's own `sendmsg()`/xmit path with no victim action required.\nS:U - The corruption stays within kernel memory managed by the same security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The unmasked index yields an out-of-bounds write up to ~2.6 MB past a 20 KB vzalloc'd ring into neighbouring vmalloc objects (kernel stacks, other rings, module data); zeroing a pointer or length field in an adjacent structure is memory corruption that can be leveraged for information disclosure.\nI:H - This is a genuine out-of-bounds write with an attacker-steerable offset over a multi-megabyte window of vmalloc space, corrupting unrelated kernel structures.\nA:H - The commit states outright that the unmasked index \"crashes on error conditions\"; the write typically lands on a vmalloc guard page or unmapped region, producing a kernel oops/panic."}]}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/broadcom/bnxt/bnxt.c"],"versions":[{"version":"6d1add95536bafe585c500ad8114af7ed4225a0f","lessThan":"21e70f694bc0dcb40174b0940cc52a7769fc19e0","status":"affected","versionType":"git"},{"version":"6d1add95536bafe585c500ad8114af7ed4225a0f","lessThan":"3742c55de00266fa7c8fd2c5d61a453d223a9cd1","status":"affected","versionType":"git"},{"version":"6d1add95536bafe585c500ad8114af7ed4225a0f","lessThan":"12f2d033fae957d84c2c0ce604d2a077e61fa2c0","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/broadcom/bnxt/bnxt.c"],"versions":[{"version":"6.8","status":"affected"},{"version":"0","lessThan":"6.8","status":"unaffected","versionType":"semver"},{"version":"6.12.25","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.14.4","lessThanOrEqual":"6.14.*","status":"unaffected","versionType":"semver"},{"version":"6.15","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8","versionEndExcluding":"6.12.25"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8","versionEndExcluding":"6.14.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8","versionEndExcluding":"6.15"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/21e70f694bc0dcb40174b0940cc52a7769fc19e0"},{"url":"https://git.kernel.org/stable/c/3742c55de00266fa7c8fd2c5d61a453d223a9cd1"},{"url":"https://git.kernel.org/stable/c/12f2d033fae957d84c2c0ce604d2a077e61fa2c0"}],"title":"eth: bnxt: fix missing ring index trim on error path","x_generator":{"engine":"bippy-1.2.0"}}}}