201 lines
13 KiB
JSON
201 lines
13 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-2025-21801",
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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": "2024-12-29T08:45:45.770Z",
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"datePublished": "2025-02-27T20:00:55.572Z",
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"dateUpdated": "2026-10-30T12:20:51.096Z"
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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": "2026-10-30T12:20:51.096Z"
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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: ravb: Fix missing rtnl lock in suspend/resume path\n\nFix the suspend/resume path by ensuring the rtnl lock is held where\nrequired. Calls to ravb_open, ravb_close and wol operations must be\nperformed under the rtnl lock to prevent conflicts with ongoing ndo\noperations.\n\nWithout this fix, the following warning is triggered:\n[ 39.032969] =============================\n[ 39.032983] WARNING: suspicious RCU usage\n[ 39.033019] -----------------------------\n[ 39.033033] drivers/net/phy/phy_device.c:2004 suspicious\nrcu_dereference_protected() usage!\n...\n[ 39.033597] stack backtrace:\n[ 39.033613] CPU: 0 UID: 0 PID: 174 Comm: python3 Not tainted\n6.13.0-rc7-next-20250116-arm64-renesas-00002-g35245dfdc62c #7\n[ 39.033623] Hardware name: Renesas SMARC EVK version 2 based on\nr9a08g045s33 (DT)\n[ 39.033628] Call trace:\n[ 39.033633] show_stack+0x14/0x1c (C)\n[ 39.033652] dump_stack_lvl+0xb4/0xc4\n[ 39.033664] dump_stack+0x14/0x1c\n[ 39.033671] lockdep_rcu_suspicious+0x16c/0x22c\n[ 39.033682] phy_detach+0x160/0x190\n[ 39.033694] phy_disconnect+0x40/0x54\n[ 39.033703] ravb_close+0x6c/0x1cc\n[ 39.033714] ravb_suspend+0x48/0x120\n[ 39.033721] dpm_run_callback+0x4c/0x14c\n[ 39.033731] device_suspend+0x11c/0x4dc\n[ 39.033740] dpm_suspend+0xdc/0x214\n[ 39.033748] dpm_suspend_start+0x48/0x60\n[ 39.033758] suspend_devices_and_enter+0x124/0x574\n[ 39.033769] pm_suspend+0x1ac/0x274\n[ 39.033778] state_store+0x88/0x124\n[ 39.033788] kobj_attr_store+0x14/0x24\n[ 39.033798] sysfs_kf_write+0x48/0x6c\n[ 39.033808] kernfs_fop_write_iter+0x118/0x1a8\n[ 39.033817] vfs_write+0x27c/0x378\n[ 39.033825] ksys_write+0x64/0xf4\n[ 39.033833] __arm64_sys_write+0x18/0x20\n[ 39.033841] invoke_syscall+0x44/0x104\n[ 39.033852] el0_svc_common.constprop.0+0xb4/0xd4\n[ 39.033862] do_el0_svc+0x18/0x20\n[ 39.033870] el0_svc+0x3c/0xf0\n[ 39.033880] el0t_64_sync_handler+0xc0/0xc4\n[ 39.033888] el0t_64_sync+0x154/0x158\n[ 39.041274] ravb 11c30000.ethernet eth0: Link is Down"
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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:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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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:L - The vulnerable code is a platform Ethernet driver's PM callback pair reached only through local activity — a suspend/resume transition plus a concurrent local rtnl-protected operation (ethtool ioctl, netlink, or an internally scheduled work item). No remote peer can reach or drive the unlocked window.\nAC:L - The attacker influences both sides: suspend/resume cycles are continuously and automatically driven on these Renesas embedded/automotive targets (and requestable by an unprivileged local session on general-purpose systems), while unprivileged ethtool/ioctl calls and interface traffic supply the concurrent rtnl-side operation, and the attempt can be repeated indefinitely until it lands.\nPR:L - An unprivileged local user suffices — `ETHTOOL_GSET`/`GLINKSETTINGS`/`GSTATS` are explicitly exempt from any capability check yet still run under `rtnl_lock()`, and generating the traffic that arms `ravb_tx_timeout_work()` needs only an ordinary socket; no root or `CAP_NET_ADMIN` is required.\nUI:N - System suspend/resume is triggered automatically by autosleep, idle timeouts, or RTC wakeups on the affected embedded and automotive platforms, so no victim action is needed for the window to open.\nS:U - The corruption is confined to kernel heap and DMA-coherent memory managed by the same kernel security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The unlocked teardown frees the `phy_device` and the descriptor rings while concurrent rtnl holders still hold pointers to them, and use-after-free of these objects lets an attacker who reclaims the freed slabs read back kernel memory contents through the surviving accessors.\nI:H - Concurrent `ravb_ring_free()` from suspend and `ravb_tx_timeout_work()` double-frees DMA-coherent rings, page-pool objects, and kmalloc'd arrays, and the DMAC can remain programmed to write into freed pages — heap corruption plus a device-driven write primitive suitable for control-flow hijacking.\nA:H - The race reliably produces kernel crashes — double `dma_free_coherent`/`page_pool_destroy`, use-after-free oopses on the detached PHY, and external aborts from MMIO access to an AVB block whose reset is asserted and clocks gated — taking down the system's primary network interface and the machine itself."
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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/renesas/ravb_main.c"
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],
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"versions": [
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{
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"version": "0184165b2f42c4b032da9dd11546bfbaeb5afd4e",
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"lessThan": "5d45f5c51e676e3bcbfe49249499621d571287d4",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "0184165b2f42c4b032da9dd11546bfbaeb5afd4e",
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"lessThan": "6105f0d9cc7be8669c2eed24b88b4655d5c35e8c",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "0184165b2f42c4b032da9dd11546bfbaeb5afd4e",
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"lessThan": "0296981941cf291edfbc318d3255a93439f368e4",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "0184165b2f42c4b032da9dd11546bfbaeb5afd4e",
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"lessThan": "ad19522c007bb24ed874468f8baa1503c4662cf4",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "0184165b2f42c4b032da9dd11546bfbaeb5afd4e",
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"lessThan": "2c2ebb2b49573e5f8726112ad06b1dffc3c9ea03",
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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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{
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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/renesas/ravb_main.c"
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],
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"versions": [
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{
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"version": "4.9",
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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": "4.9",
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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": "6.1.191",
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"lessThanOrEqual": "6.1.*",
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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": "6.6.160",
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"lessThanOrEqual": "6.6.*",
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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": "6.12.13",
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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": "6.13.2",
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"lessThanOrEqual": "6.13.*",
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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": "6.14",
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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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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.9",
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"versionEndExcluding": "6.1.191"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.9",
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}
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/5d45f5c51e676e3bcbfe49249499621d571287d4"
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},
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{
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"url": "https://git.kernel.org/stable/c/6105f0d9cc7be8669c2eed24b88b4655d5c35e8c"
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},
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{
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"url": "https://git.kernel.org/stable/c/0296981941cf291edfbc318d3255a93439f368e4"
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},
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{
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"url": "https://git.kernel.org/stable/c/ad19522c007bb24ed874468f8baa1503c4662cf4"
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},
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{
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"url": "https://git.kernel.org/stable/c/2c2ebb2b49573e5f8726112ad06b1dffc3c9ea03"
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}
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],
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"title": "net: ravb: Fix missing rtnl lock in suspend/resume path",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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}
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}
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} |