159 lines
8.8 KiB
JSON
159 lines
8.8 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2025-38545",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2025-04-16T04:51:24.024Z",
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"datePublished": "2025-08-16T11:22:19.459Z",
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"dateUpdated": "2026-08-05T12:02:47.780Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T12:02:47.780Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ethernet: ti: am65-cpsw-nuss: Fix skb size by accounting for skb_shared_info\n\nWhile transitioning from netdev_alloc_ip_align() to build_skb(), memory\nfor the \"skb_shared_info\" member of an \"skb\" was not allocated. Fix this\nby allocating \"PAGE_SIZE\" as the skb length, accounting for the packet\nlength, headroom and tailroom, thereby including the required memory space\nfor skb_shared_info."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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"baseScore": 7.5,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:N - The vulnerable code is the am65-cpsw RX NAPI path, entered solely by processing a received Ethernet frame, and the panic threshold (1704 bytes) is below the driver's supported max_mtu of 2002, so an ordinary routed IP datagram from a remote host triggers it on any port configured with an MTU above ~1690.\nAC:L - The attacker only needs to get a frame larger than 1704 bytes delivered to the interface; the hardware RX_MAXLEN is fixed at 2024 independent of the configured MTU, so even at the default MTU an oversized frame is accepted and DMA'd, and the resulting skb_put() overflow is deterministic with no race or memory-layout dependency.\nPR:N - The crash happens in am65_cpsw_nuss_rx_packets() before eth_type_trans() and any protocol or socket demultiplexing, so no credentials, sockets, or local access of any kind are required — a broadcast or unicast frame to the port's MAC suffices.\nUI:N - Packet reception and NAPI polling are entirely automatic; no action by any local or remote user is needed once the interface is up.\nS:U - The BUG() and resulting panic occur in the kernel of the receiving host, affecting only resources managed by that same security authority with no crossing of a VM, IOMMU, or sandbox boundary.\nC:N - skb->end is understated rather than overstated, so no out-of-bounds read occurs — skb_put()'s bounds check fires before any data past the allocation is touched, and packets at or below 1704 bytes end exactly at the skb_shared_info boundary with no overlap.\nI:N - There is no out-of-bounds write: skb_shared_info and the entire DMA buffer stay within the order-0 page, the page is never in the DMA ring while a live skb references it, and the oversize case aborts at the skb_put() check rather than corrupting adjacent memory.\nA:H - Any frame exceeding 1704 bytes drives skb_put() past skb->end into skb_over_panic() -> BUG() from softirq context, which on arm64 becomes \"Fatal exception in interrupt\" and panics the machine; it is remotely and repeatably triggerable."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/net/ethernet/ti/am65-cpsw-nuss.c"
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],
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"versions": [
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{
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"version": "8acacc40f7337527ff84cd901ed2ef0a2b95b2b6",
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"lessThan": "fc2fffa2facac15ce711e95f98f954426e025bc5",
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"status": "affected",
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"versionType": "git"
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/net/ethernet/ti/am65-cpsw-nuss.c"
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],
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"versions": [
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{
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"version": "6.10",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "6.10",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12.39",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.15.7",
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"lessThanOrEqual": "6.15.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.16",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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"versionStartIncluding": "6.10",
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"versionEndExcluding": "6.12.39"
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/fc2fffa2facac15ce711e95f98f954426e025bc5"
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},
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{
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"url": "https://git.kernel.org/stable/c/7d6ca0c8c0caf9a13cae2de763bb1f2a9ea7eabb"
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},
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{
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"url": "https://git.kernel.org/stable/c/02c4d6c26f1f662da8885b299c224ca6628ad232"
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}
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],
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"title": "net: ethernet: ti: am65-cpsw-nuss: Fix skb size by accounting for skb_shared_info",
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