{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2021-47449", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2021-47449", "idYear": 2021, "status": "PUBLISHED", "publishedAt": "2024-05-22T06:19:40.793Z", "updatedAt": "2026-05-11T13:54:55.237Z", "importedAt": "2026-10-24T01:56:36.661Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "ice: fix locking for Tx timestamp tracking flush", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nice: fix locking for Tx timestamp tracking flush\n\nCommit 4dd0d5c33c3e (\"ice: add lock around Tx timestamp tracker flush\")\nadded a lock around the Tx timestamp tracker flow which is used to\ncleanup any left over SKBs and prepare for device removal.\n\nThis lock is problematic because it is being held around a call to\nice_clear_phy_tstamp. The clear function takes a mutex to send a PHY\nwrite command to firmware. This could lead to a deadlock if the mutex\nactually sleeps, and causes the following warning on a kernel with\npreemption debugging enabled:\n\n[ 715.419426] BUG: sleeping function called from invalid context at kernel/locking/mutex.c:573\n[ 715.427900] in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 3100, name: rmmod\n[ 715.435652] INFO: lockdep is turned off.\n[ 715.439591] Preemption disabled at:\n[ 715.439594] [<0000000000000000>] 0x0\n[ 715.446678] CPU: 52 PID: 3100 Comm: rmmod Tainted: G W OE 5.15.0-rc4+ #42 bdd7ec3018e725f159ca0d372ce8c2c0e784891c\n[ 715.458058] Hardware name: Intel Corporation S2600STQ/S2600STQ, BIOS SE5C620.86B.02.01.0010.010620200716 01/06/2020\n[ 715.468483] Call Trace:\n[ 715.470940] dump_stack_lvl+0x6a/0x9a\n[ 715.474613] ___might_sleep.cold+0x224/0x26a\n[ 715.478895] __mutex_lock+0xb3/0x1440\n[ 715.482569] ? stack_depot_save+0x378/0x500\n[ 715.486763] ? ice_sq_send_cmd+0x78/0x14c0 [ice 9a7e1ec00971c89ecd3fe0d4dc7da2b3786a421d]\n[ 715.494979] ? kfree+0xc1/0x520\n[ 715.498128] ? mutex_lock_io_nested+0x12a0/0x12a0\n[ 715.502837] ? kasan_set_free_info+0x20/0x30\n[ 715.507110] ? __kasan_slab_free+0x10b/0x140\n[ 715.511385] ? slab_free_freelist_hook+0xc7/0x220\n[ 715.516092] ? kfree+0xc1/0x520\n[ 715.519235] ? ice_deinit_lag+0x16c/0x220 [ice 9a7e1ec00971c89ecd3fe0d4dc7da2b3786a421d]\n[ 715.527359] ? ice_remove+0x1cf/0x6a0 [ice 9a7e1ec00971c89ecd3fe0d4dc7da2b3786a421d]\n[ 715.535133] ? pci_device_remove+0xab/0x1d0\n[ 715.539318] ? __device_release_driver+0x35b/0x690\n[ 715.544110] ? driver_detach+0x214/0x2f0\n[ 715.548035] ? bus_remove_driver+0x11d/0x2f0\n[ 715.552309] ? pci_unregister_driver+0x26/0x250\n[ 715.556840] ? ice_module_exit+0xc/0x2f [ice 9a7e1ec00971c89ecd3fe0d4dc7da2b3786a421d]\n[ 715.564799] ? __do_sys_delete_module.constprop.0+0x2d8/0x4e0\n[ 715.570554] ? do_syscall_64+0x3b/0x90\n[ 715.574303] ? entry_SYSCALL_64_after_hwframe+0x44/0xae\n[ 715.579529] ? start_flush_work+0x542/0x8f0\n[ 715.583719] ? ice_sq_send_cmd+0x78/0x14c0 [ice 9a7e1ec00971c89ecd3fe0d4dc7da2b3786a421d]\n[ 715.591923] ice_sq_send_cmd+0x78/0x14c0 [ice 9a7e1ec00971c89ecd3fe0d4dc7da2b3786a421d]\n[ 715.599960] ? wait_for_completion_io+0x250/0x250\n[ 715.604662] ? lock_acquire+0x196/0x200\n[ 715.608504] ? do_raw_spin_trylock+0xa5/0x160\n[ 715.612864] ice_sbq_rw_reg+0x1e6/0x2f0 [ice 9a7e1ec00971c89ecd3fe0d4dc7da2b3786a421d]\n[ 715.620813] ? ice_reset+0x130/0x130 [ice 9a7e1ec00971c89ecd3fe0d4dc7da2b3786a421d]\n[ 715.628497] ? __debug_check_no_obj_freed+0x1e8/0x3c0\n[ 715.633550] ? trace_hardirqs_on+0x1c/0x130\n[ 715.637748] ice_write_phy_reg_e810+0x70/0xf0 [ice 9a7e1ec00971c89ecd3fe0d4dc7da2b3786a421d]\n[ 715.646220] ? do_raw_spin_trylock+0xa5/0x160\n[ 715.650581] ? ice_ptp_release+0x910/0x910 [ice 9a7e1ec00971c89ecd3fe0d4dc7da2b3786a421d]\n[ 715.658797] ? ice_ptp_release+0x255/0x910 [ice 9a7e1ec00971c89ecd3fe0d4dc7da2b3786a421d]\n[ 715.667013] ice_clear_phy_tstamp+0x2c/0x110 [ice 9a7e1ec00971c89ecd3fe0d4dc7da2b3786a421d]\n[ 715.675403] ice_ptp_release+0x408/0x910 [ice 9a7e1ec00971c89ecd3fe0d4dc7da2b3786a421d]\n[ 715.683440] ice_remove+0x560/0x6a0 [ice 9a7e1ec00971c89ecd3fe0d4dc7da2b3786a421d]\n[ 715.691037] ? _raw_spin_unlock_irqrestore+0x46/0x73\n[ 715.696005] pci_device_remove+0xab/0x1d0\n[ 715.700018] __device_release_driver+0x35b/0x690\n[ 715.704637] driver_detach+0x214/0x2f0\n[ 715.708389] bus_remove_driver+0x11d/0x2f0\n[ 715.712489] pci_unregister_driver+0x26/0x250\n[ 71\n---truncated---", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "46720ac66c21bf85e08823664b7b314b85e43f26", "status": "affected", "versionType": "git", "lessThan": "61616be899975404df44c20ab902464b60882cd7" }, { "version": "4dd0d5c33c3ebf24a07cae6141648aeb7ba56072", "status": "affected", "versionType": "git", "lessThan": "4d4a223a86afe658cd878800f09458e8bb54415d" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "5.14.4", "status": "affected", "versionType": "semver", "lessThan": "5.14.14" } ] } ] } } }