{ "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-2024-48875", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2024-48875", "idYear": 2024, "status": "PUBLISHED", "publishedAt": "2025-01-11T12:25:16.981Z", "updatedAt": "2026-05-11T20:40:16.557Z", "importedAt": "2026-10-24T01:57:16.009Z", "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": "btrfs: don't take dev_replace rwsem on task already holding it", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: don't take dev_replace rwsem on task already holding it\n\nRunning fstests btrfs/011 with MKFS_OPTIONS=\"-O rst\" to force the usage of\nthe RAID stripe-tree, we get the following splat from lockdep:\n\n BTRFS info (device sdd): dev_replace from /dev/sdd (devid 1) to /dev/sdb started\n\n ============================================\n WARNING: possible recursive locking detected\n 6.11.0-rc3-btrfs-for-next #599 Not tainted\n --------------------------------------------\n btrfs/2326 is trying to acquire lock:\n ffff88810f215c98 (&fs_info->dev_replace.rwsem){++++}-{3:3}, at: btrfs_map_block+0x39f/0x2250\n\n but task is already holding lock:\n ffff88810f215c98 (&fs_info->dev_replace.rwsem){++++}-{3:3}, at: btrfs_map_block+0x39f/0x2250\n\n other info that might help us debug this:\n Possible unsafe locking scenario:\n\n CPU0\n ----\n lock(&fs_info->dev_replace.rwsem);\n lock(&fs_info->dev_replace.rwsem);\n\n *** DEADLOCK ***\n\n May be due to missing lock nesting notation\n\n 1 lock held by btrfs/2326:\n #0: ffff88810f215c98 (&fs_info->dev_replace.rwsem){++++}-{3:3}, at: btrfs_map_block+0x39f/0x2250\n\n stack backtrace:\n CPU: 1 UID: 0 PID: 2326 Comm: btrfs Not tainted 6.11.0-rc3-btrfs-for-next #599\n Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011\n Call Trace:\n \n dump_stack_lvl+0x5b/0x80\n __lock_acquire+0x2798/0x69d0\n ? __pfx___lock_acquire+0x10/0x10\n ? __pfx___lock_acquire+0x10/0x10\n lock_acquire+0x19d/0x4a0\n ? btrfs_map_block+0x39f/0x2250\n ? __pfx_lock_acquire+0x10/0x10\n ? find_held_lock+0x2d/0x110\n ? lock_is_held_type+0x8f/0x100\n down_read+0x8e/0x440\n ? btrfs_map_block+0x39f/0x2250\n ? __pfx_down_read+0x10/0x10\n ? do_raw_read_unlock+0x44/0x70\n ? _raw_read_unlock+0x23/0x40\n btrfs_map_block+0x39f/0x2250\n ? btrfs_dev_replace_by_ioctl+0xd69/0x1d00\n ? btrfs_bio_counter_inc_blocked+0xd9/0x2e0\n ? __kasan_slab_alloc+0x6e/0x70\n ? __pfx_btrfs_map_block+0x10/0x10\n ? __pfx_btrfs_bio_counter_inc_blocked+0x10/0x10\n ? kmem_cache_alloc_noprof+0x1f2/0x300\n ? mempool_alloc_noprof+0xed/0x2b0\n btrfs_submit_chunk+0x28d/0x17e0\n ? __pfx_btrfs_submit_chunk+0x10/0x10\n ? bvec_alloc+0xd7/0x1b0\n ? bio_add_folio+0x171/0x270\n ? __pfx_bio_add_folio+0x10/0x10\n ? __kasan_check_read+0x20/0x20\n btrfs_submit_bio+0x37/0x80\n read_extent_buffer_pages+0x3df/0x6c0\n btrfs_read_extent_buffer+0x13e/0x5f0\n read_tree_block+0x81/0xe0\n read_block_for_search+0x4bd/0x7a0\n ? __pfx_read_block_for_search+0x10/0x10\n btrfs_search_slot+0x78d/0x2720\n ? __pfx_btrfs_search_slot+0x10/0x10\n ? lock_is_held_type+0x8f/0x100\n ? kasan_save_track+0x14/0x30\n ? __kasan_slab_alloc+0x6e/0x70\n ? kmem_cache_alloc_noprof+0x1f2/0x300\n btrfs_get_raid_extent_offset+0x181/0x820\n ? __pfx_lock_acquire+0x10/0x10\n ? __pfx_btrfs_get_raid_extent_offset+0x10/0x10\n ? down_read+0x194/0x440\n ? __pfx_down_read+0x10/0x10\n ? do_raw_read_unlock+0x44/0x70\n ? _raw_read_unlock+0x23/0x40\n btrfs_map_block+0x5b5/0x2250\n ? __pfx_btrfs_map_block+0x10/0x10\n scrub_submit_initial_read+0x8fe/0x11b0\n ? __pfx_scrub_submit_initial_read+0x10/0x10\n submit_initial_group_read+0x161/0x3a0\n ? lock_release+0x20e/0x710\n ? __pfx_submit_initial_group_read+0x10/0x10\n ? __pfx_lock_release+0x10/0x10\n scrub_simple_mirror.isra.0+0x3eb/0x580\n scrub_stripe+0xe4d/0x1440\n ? lock_release+0x20e/0x710\n ? __pfx_scrub_stripe+0x10/0x10\n ? __pfx_lock_release+0x10/0x10\n ? do_raw_read_unlock+0x44/0x70\n ? _raw_read_unlock+0x23/0x40\n scrub_chunk+0x257/0x4a0\n scrub_enumerate_chunks+0x64c/0xf70\n ? __mutex_unlock_slowpath+0x147/0x5f0\n ? __pfx_scrub_enumerate_chunks+0x10/0x10\n ? bit_wait_timeout+0xb0/0x170\n ? __up_read+0x189/0x700\n ? scrub_workers_get+0x231/0x300\n ? up_write+0x490/0x4f0\n btrfs_scrub_dev+0x52e/0xcd0\n ? create_pending_snapshots+0x230/0x250\n ? __pfx_btrfs_scrub_dev+0x10/0x10\n btrfs_dev_replace_by_ioctl+0xd69/0x1d00\n ? lock_acquire+0x19d/0x4a0\n ? __pfx_btrfs_dev_replace_by_ioctl+0x10/0x10\n ?\n---truncated---", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "10e27980f2ff66ba0c6da55f33b4814d5bc86573", "status": "affected", "versionType": "git", "lessThan": "a2e99dcd7aafa9d474f7d9b0740b8f93c4e156c2" }, { "version": "10e27980f2ff66ba0c6da55f33b4814d5bc86573", "status": "affected", "versionType": "git", "lessThan": "8cca35cb29f81eba3e96ec44dad8696c8a2f9138" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "6.7", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "6.7" }, { "version": "6.12.5", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.12.*" }, { "version": "6.13", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }