{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2025-39908", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T07:20:57.146Z", "datePublished": "2025-10-01T07:44:31.904Z", "dateUpdated": "2026-08-05T12:06:01.925Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:06:01.925Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: dev_ioctl: take ops lock in hwtstamp lower paths\n\nndo hwtstamp callbacks are expected to run under the per-device ops\nlock. Make the lower get/set paths consistent with the rest of ndo\ninvocations.\n\nKernel log:\nWARNING: CPU: 13 PID: 51364 at ./include/net/netdev_lock.h:70 __netdev_update_features+0x4bd/0xe60\n...\nRIP: 0010:__netdev_update_features+0x4bd/0xe60\n...\nCall Trace:\n\nnetdev_update_features+0x1f/0x60\nmlx5_hwtstamp_set+0x181/0x290 [mlx5_core]\nmlx5e_hwtstamp_set+0x19/0x30 [mlx5_core]\ndev_set_hwtstamp_phylib+0x9f/0x220\ndev_set_hwtstamp_phylib+0x9f/0x220\ndev_set_hwtstamp+0x13d/0x240\ndev_ioctl+0x12f/0x4b0\nsock_ioctl+0x171/0x370\n__x64_sys_ioctl+0x3f7/0x900\n? __sys_setsockopt+0x69/0xb0\ndo_syscall_64+0x6f/0x2e0\nentry_SYSCALL_64_after_hwframe+0x4b/0x53\n...\n\n....\n---[ end trace 0000000000000000 ]---\n\nNote that the mlx5_hwtstamp_set and mlx5e_hwtstamp_set functions shown\nin the trace come from an in progress patch converting the legacy ioctl\nto ndo_hwtstamp_get/set and are not present in mainline." } ], "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 vulnerable code is reached through the `SIOCGHWTSTAMP`/`SIOCSHWTSTAMP` socket ioctl on a stacked netdev (VLAN/bond/macvlan), which requires local access to the system. No remote or adjacent network input reaches this path.\nAC:L - The attacker fully controls one side of the race (spamming the unlocked ioctl in a tight loop) and can drive the other side by triggering device reconfiguration/VF resets or racing concurrent netdev-genl queue operations that take only `dev->lock`; no attacker-uncontrollable precondition is required beyond a bond/VLAN/macvlan over an ops-locked NIC, which is a standard datacenter/cloud configuration.\nPR:L - `SIOCGHWTSTAMP` passes through `dev_ioctl`'s default case with no capability check whatsoever, so any unprivileged local user reaches the unlocked lower-device ndo call; `SIOCSHWTSTAMP` requires only `ns_capable(net->user_ns, CAP_NET_ADMIN)`, which an unprivileged user obtains via user namespaces or holds inside a container netns.\nUI:N - The ioctl is issued directly by the attacker's own process; no victim action, mount, or file open is needed.\nS:U - The missing lock and its consequences are entirely within the kernel's own security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The unserialized `ndo_hwtstamp_get`/`set` racing against `iavf_free_queues()`/queue reconfiguration yields use-after-free access to freed kernel heap objects, which is leverageable to read reclaimed kernel memory, and the get path can return torn driver state.\nI:H - The race produces a use-after-free read-modify-write (`adapter->rx_rings[i].flags |= ...`) into a freed or reallocated array, and an out-of-bounds write once `num_active_queues` changes underneath the loop — a controllable kernel heap write primitive usable for privilege escalation.\nA:H - The missing lock trips `netdev_ops_assert_locked()`, producing a WARNING splat that panics on `panic_on_warn` systems, and the underlying use-after-free/NULL-deref on `adapter->rx_rings` crashes the kernel outright." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/core/dev_ioctl.c" ], "versions": [ { "version": "ffb7ed19ac0a9fa9ea79af1d7b42c03a10da98a5", "lessThan": "2d92fa0cdc02291de57f72170e8b60cef0cf5372", "status": "affected", "versionType": "git" }, { "version": "ffb7ed19ac0a9fa9ea79af1d7b42c03a10da98a5", "lessThan": "686cab5a18e443e1d5f2abb17bed45837836425f", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/core/dev_ioctl.c" ], "versions": [ { "version": "6.15", "status": "affected" }, { "version": "0", "lessThan": "6.15", "status": "unaffected", "versionType": "semver" }, { "version": "6.16.8", "lessThanOrEqual": "6.16.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.17", "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": "6.15", "versionEndExcluding": "6.16.8" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.15", "versionEndExcluding": "6.17" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/2d92fa0cdc02291de57f72170e8b60cef0cf5372" }, { "url": "https://git.kernel.org/stable/c/686cab5a18e443e1d5f2abb17bed45837836425f" } ], "title": "net: dev_ioctl: take ops lock in hwtstamp lower paths", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "cvssV3_1": { "scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE" } }, { "other": { "type": "ssvc", "content": { "id": "CVE-2025-39908", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2026-01-14T17:42:37.187417Z" } } } ], "problemTypes": [ { "descriptions": [ { "lang": "en", "type": "CWE", "description": "CWE-noinfo Not enough information" } ] } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-01-14T17:42:46.951Z" } } ] } }