{ "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-2022-50381", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2022-50381", "idYear": 2022, "status": "PUBLISHED", "publishedAt": "2025-09-18T13:33:03.439Z", "updatedAt": "2026-05-11T19:18:26.291Z", "importedAt": "2026-10-24T01:56:49.724Z", "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": "md: fix a crash in mempool_free", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nmd: fix a crash in mempool_free\n\nThere's a crash in mempool_free when running the lvm test\nshell/lvchange-rebuild-raid.sh.\n\nThe reason for the crash is this:\n* super_written calls atomic_dec_and_test(&mddev->pending_writes) and\n wake_up(&mddev->sb_wait). Then it calls rdev_dec_pending(rdev, mddev)\n and bio_put(bio).\n* so, the process that waited on sb_wait and that is woken up is racing\n with bio_put(bio).\n* if the process wins the race, it calls bioset_exit before bio_put(bio)\n is executed.\n* bio_put(bio) attempts to free a bio into a destroyed bio set - causing\n a crash in mempool_free.\n\nWe fix this bug by moving bio_put before atomic_dec_and_test.\n\nWe also move rdev_dec_pending before atomic_dec_and_test as suggested by\nNeil Brown.\n\nThe function md_end_flush has a similar bug - we must call bio_put before\nwe decrement the number of in-progress bios.\n\n BUG: kernel NULL pointer dereference, address: 0000000000000000\n #PF: supervisor write access in kernel mode\n #PF: error_code(0x0002) - not-present page\n PGD 11557f0067 P4D 11557f0067 PUD 0\n Oops: 0002 [#1] PREEMPT SMP\n CPU: 0 PID: 73 Comm: kworker/0:1 Not tainted 6.1.0-rc3 #5\n Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.14.0-2 04/01/2014\n Workqueue: kdelayd flush_expired_bios [dm_delay]\n RIP: 0010:mempool_free+0x47/0x80\n Code: 48 89 ef 5b 5d ff e0 f3 c3 48 89 f7 e8 32 45 3f 00 48 63 53 08 48 89 c6 3b 53 04 7d 2d 48 8b 43 10 8d 4a 01 48 89 df 89 4b 08 <48> 89 2c d0 e8 b0 45 3f 00 48 8d 7b 30 5b 5d 31 c9 ba 01 00 00 00\n RSP: 0018:ffff88910036bda8 EFLAGS: 00010093\n RAX: 0000000000000000 RBX: ffff8891037b65d8 RCX: 0000000000000001\n RDX: 0000000000000000 RSI: 0000000000000202 RDI: ffff8891037b65d8\n RBP: ffff8891447ba240 R08: 0000000000012908 R09: 00000000003d0900\n R10: 0000000000000000 R11: 0000000000173544 R12: ffff889101a14000\n R13: ffff8891562ac300 R14: ffff889102b41440 R15: ffffe8ffffa00d05\n FS: 0000000000000000(0000) GS:ffff88942fa00000(0000) knlGS:0000000000000000\n CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n CR2: 0000000000000000 CR3: 0000001102e99000 CR4: 00000000000006b0\n Call Trace:\n \n clone_endio+0xf4/0x1c0 [dm_mod]\n clone_endio+0xf4/0x1c0 [dm_mod]\n __submit_bio+0x76/0x120\n submit_bio_noacct_nocheck+0xb6/0x2a0\n flush_expired_bios+0x28/0x2f [dm_delay]\n process_one_work+0x1b4/0x300\n worker_thread+0x45/0x3e0\n ? rescuer_thread+0x380/0x380\n kthread+0xc2/0x100\n ? kthread_complete_and_exit+0x20/0x20\n ret_from_fork+0x1f/0x30\n \n Modules linked in: brd dm_delay dm_raid dm_mod af_packet uvesafb cfbfillrect cfbimgblt cn cfbcopyarea fb font fbdev tun autofs4 binfmt_misc configfs ipv6 virtio_rng virtio_balloon rng_core virtio_net pcspkr net_failover failover qemu_fw_cfg button mousedev raid10 raid456 libcrc32c async_raid6_recov async_memcpy async_pq raid6_pq async_xor xor async_tx raid1 raid0 md_mod sd_mod t10_pi crc64_rocksoft crc64 virtio_scsi scsi_mod evdev psmouse bsg scsi_common [last unloaded: brd]\n CR2: 0000000000000000\n ---[ end trace 0000000000000000 ]---", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "f8b58edf3acf0dcc186b8330939000ecf709368a", "status": "affected", "versionType": "git", "lessThan": "732cd66ec19a17f2b9183d7d5b7bdb9c39b0776e" }, { "version": "f8b58edf3acf0dcc186b8330939000ecf709368a", "status": "affected", "versionType": "git", "lessThan": "cf06b162f5b6337b688072a1a47941280b8f7110" }, { "version": "f8b58edf3acf0dcc186b8330939000ecf709368a", "status": "affected", "versionType": "git", "lessThan": "b5be563b4356b3089b3245d024cae3f248ba7090" }, { "version": "f8b58edf3acf0dcc186b8330939000ecf709368a", "status": "affected", "versionType": "git", "lessThan": "384ef33d37cefb2ac539d44597d03f06c9b8975c" }, { "version": "f8b58edf3acf0dcc186b8330939000ecf709368a", "status": "affected", "versionType": "git", "lessThan": "ae7793027766491c5f8635b12d15a5940d3b8698" }, { "version": "f8b58edf3acf0dcc186b8330939000ecf709368a", "status": "affected", "versionType": "git", "lessThan": "91bd504128a51776472445070e11a3b0f9348c90" }, { "version": "f8b58edf3acf0dcc186b8330939000ecf709368a", "status": "affected", "versionType": "git", "lessThan": "842f222fc42a9239831e15b1fd49a51c546902cb" }, { "version": "f8b58edf3acf0dcc186b8330939000ecf709368a", "status": "affected", "versionType": "git", "lessThan": "97ce99984be12b9acb49ddce0f5d8ebb037adbb6" }, { "version": "f8b58edf3acf0dcc186b8330939000ecf709368a", "status": "affected", "versionType": "git", "lessThan": "341097ee53573e06ab9fc675d96a052385b851fa" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "2.6.13", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "2.6.13" }, { "version": "4.9.337", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "4.9.*" }, { "version": "4.14.303", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "4.14.*" }, { "version": "4.19.270", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "4.19.*" }, { "version": "5.4.229", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.4.*" }, { "version": "5.10.163", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.87", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.0.17", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.0.*" }, { "version": "6.1.3", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.2", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }