{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2025-68320", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-12-16T14:48:05.295Z", "datePublished": "2025-12-16T15:44:18.217Z", "dateUpdated": "2026-08-05T12:10:52.102Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:10:52.102Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nlan966x: Fix sleeping in atomic context\n\nThe following warning was seen when we try to connect using ssh to the device.\n\nBUG: sleeping function called from invalid context at kernel/locking/mutex.c:575\nin_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 104, name: dropbear\npreempt_count: 1, expected: 0\nINFO: lockdep is turned off.\nCPU: 0 UID: 0 PID: 104 Comm: dropbear Tainted: G W 6.18.0-rc2-00399-g6f1ab1b109b9-dirty #530 NONE\nTainted: [W]=WARN\nHardware name: Generic DT based system\nCall trace:\n unwind_backtrace from show_stack+0x10/0x14\n show_stack from dump_stack_lvl+0x7c/0xac\n dump_stack_lvl from __might_resched+0x16c/0x2b0\n __might_resched from __mutex_lock+0x64/0xd34\n __mutex_lock from mutex_lock_nested+0x1c/0x24\n mutex_lock_nested from lan966x_stats_get+0x5c/0x558\n lan966x_stats_get from dev_get_stats+0x40/0x43c\n dev_get_stats from dev_seq_printf_stats+0x3c/0x184\n dev_seq_printf_stats from dev_seq_show+0x10/0x30\n dev_seq_show from seq_read_iter+0x350/0x4ec\n seq_read_iter from seq_read+0xfc/0x194\n seq_read from proc_reg_read+0xac/0x100\n proc_reg_read from vfs_read+0xb0/0x2b0\n vfs_read from ksys_read+0x6c/0xec\n ksys_read from ret_fast_syscall+0x0/0x1c\nException stack(0xf0b11fa8 to 0xf0b11ff0)\n1fa0: 00000001 00001000 00000008 be9048d8 00001000 00000001\n1fc0: 00000001 00001000 00000008 00000003 be905920 0000001e 00000000 00000001\n1fe0: 0005404c be9048c0 00018684 b6ec2cd8\n\nIt seems that we are using a mutex in a atomic context which is wrong.\nChange the mutex with a spinlock." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:N - An unauthenticated TCP connection to Dropbear reaches the flaw because its accept loop reads /proc/net/dev before forking or authentication. This is the network-facing embedded deployment documented by the fix.\nAC:L - Each accepted connection deterministically triggers the statistics read, and repeated connections can intersect the driver's periodic statistics-lock hold. No race condition outside the attacker's practical influence is required.\nPR:N - The vulnerable read occurs before SSH authentication, so no service credentials, local account, or kernel capability are required.\nUI:N - Once the network service is running, the attacker can trigger the flaw without any victim action.\nS:U - The resulting failure remains within the host kernel's security authority and does not cross a virtualization, sandbox, or IOMMU boundary.\nC:N - The affected code reads in-bounds cached counters and provides no attacker-visible kernel-memory disclosure or arbitrary-read primitive.\nI:N - The flaw provides no attacker-controlled memory write, data modification, or control-flow primitive.\nA:H - A contended mutex can force scheduling while RCU or preemption is disabled, causing scheduling-state corruption and a potential kernel panic or hang. Repeated pre-authentication connections can drive this condition." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/ethernet/microchip/lan966x/lan966x_ethtool.c", "drivers/net/ethernet/microchip/lan966x/lan966x_main.c", "drivers/net/ethernet/microchip/lan966x/lan966x_main.h", "drivers/net/ethernet/microchip/lan966x/lan966x_vcap_impl.c" ], "versions": [ { "version": "12c2d0a5b8e2a1afc8c7738e19a0d1dd7f3d4007", "lessThan": "5a5d2f7727752b64d13263eacd9f8d08a322e662", "status": "affected", "versionType": "git" }, { "version": "12c2d0a5b8e2a1afc8c7738e19a0d1dd7f3d4007", "lessThan": "c8ab03aa5bd9fd8bfe5d9552d8605826759fdd4d", "status": "affected", "versionType": "git" }, { "version": "12c2d0a5b8e2a1afc8c7738e19a0d1dd7f3d4007", "lessThan": "3ac743c60ec502163c435712d527eeced8d83348", "status": "affected", "versionType": "git" }, { "version": "12c2d0a5b8e2a1afc8c7738e19a0d1dd7f3d4007", "lessThan": "0216721ce71252f60d89af49c8dff613358058d3", "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/microchip/lan966x/lan966x_ethtool.c", "drivers/net/ethernet/microchip/lan966x/lan966x_main.c", "drivers/net/ethernet/microchip/lan966x/lan966x_main.h", "drivers/net/ethernet/microchip/lan966x/lan966x_vcap_impl.c" ], "versions": [ { "version": "5.17", "status": "affected" }, { "version": "0", "lessThan": "5.17", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.117", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.58", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.17.8", "lessThanOrEqual": "6.17.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18", "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": "5.17", "versionEndExcluding": "6.6.117" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.17", "versionEndExcluding": "6.12.58" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.17", "versionEndExcluding": "6.17.8" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.17", "versionEndExcluding": "6.18" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/5a5d2f7727752b64d13263eacd9f8d08a322e662" }, { "url": "https://git.kernel.org/stable/c/c8ab03aa5bd9fd8bfe5d9552d8605826759fdd4d" }, { "url": "https://git.kernel.org/stable/c/3ac743c60ec502163c435712d527eeced8d83348" }, { "url": "https://git.kernel.org/stable/c/0216721ce71252f60d89af49c8dff613358058d3" } ], "title": "lan966x: Fix sleeping in atomic context", "x_generator": { "engine": "bippy-1.2.0" } } } }