{ "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-2022-49407", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2022-49407", "idYear": 2022, "status": "PUBLISHED", "publishedAt": "2025-02-26T02:12:31.562Z", "updatedAt": "2026-10-15T21:21:07.609Z", "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": "dlm: fix plock invalid read", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\ndlm: fix plock invalid read\n\nThis patch fixes an invalid read showed by KASAN. A unlock will allocate a\n\"struct plock_op\" and a followed send_op() will append it to a global\nsend_list data structure. In some cases a followed dev_read() moves it\nto recv_list and dev_write() will cast it to \"struct plock_xop\" and access\nfields which are only available in those structures. At this point an\ninvalid read happens by accessing those fields.\n\nTo fix this issue the \"callback\" field is moved to \"struct plock_op\" to\nindicate that a cast to \"plock_xop\" is allowed and does the additional\n\"plock_xop\" handling if set.\n\nExample of the KASAN output which showed the invalid read:\n\n[ 2064.296453] ==================================================================\n[ 2064.304852] BUG: KASAN: slab-out-of-bounds in dev_write+0x52b/0x5a0 [dlm]\n[ 2064.306491] Read of size 8 at addr ffff88800ef227d8 by task dlm_controld/7484\n[ 2064.308168]\n[ 2064.308575] CPU: 0 PID: 7484 Comm: dlm_controld Kdump: loaded Not tainted 5.14.0+ #9\n[ 2064.310292] Hardware name: Red Hat KVM, BIOS 0.5.1 01/01/2011\n[ 2064.311618] Call Trace:\n[ 2064.312218] dump_stack_lvl+0x56/0x7b\n[ 2064.313150] print_address_description.constprop.8+0x21/0x150\n[ 2064.314578] ? dev_write+0x52b/0x5a0 [dlm]\n[ 2064.315610] ? dev_write+0x52b/0x5a0 [dlm]\n[ 2064.316595] kasan_report.cold.14+0x7f/0x11b\n[ 2064.317674] ? dev_write+0x52b/0x5a0 [dlm]\n[ 2064.318687] dev_write+0x52b/0x5a0 [dlm]\n[ 2064.319629] ? dev_read+0x4a0/0x4a0 [dlm]\n[ 2064.320713] ? bpf_lsm_kernfs_init_security+0x10/0x10\n[ 2064.321926] vfs_write+0x17e/0x930\n[ 2064.322769] ? __fget_light+0x1aa/0x220\n[ 2064.323753] ksys_write+0xf1/0x1c0\n[ 2064.324548] ? __ia32_sys_read+0xb0/0xb0\n[ 2064.325464] do_syscall_64+0x3a/0x80\n[ 2064.326387] entry_SYSCALL_64_after_hwframe+0x44/0xae\n[ 2064.327606] RIP: 0033:0x7f807e4ba96f\n[ 2064.328470] Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 39 87 f8 ff 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 7c 87 f8 ff 48\n[ 2064.332902] RSP: 002b:00007ffd50cfe6e0 EFLAGS: 00000293 ORIG_RAX: 0000000000000001\n[ 2064.334658] RAX: ffffffffffffffda RBX: 000055cc3886eb30 RCX: 00007f807e4ba96f\n[ 2064.336275] RDX: 0000000000000040 RSI: 00007ffd50cfe7e0 RDI: 0000000000000010\n[ 2064.337980] RBP: 00007ffd50cfe7e0 R08: 0000000000000000 R09: 0000000000000001\n[ 2064.339560] R10: 000055cc3886eb30 R11: 0000000000000293 R12: 000055cc3886eb80\n[ 2064.341237] R13: 000055cc3886eb00 R14: 000055cc3886f590 R15: 0000000000000001\n[ 2064.342857]\n[ 2064.343226] Allocated by task 12438:\n[ 2064.344057] kasan_save_stack+0x1c/0x40\n[ 2064.345079] __kasan_kmalloc+0x84/0xa0\n[ 2064.345933] kmem_cache_alloc_trace+0x13b/0x220\n[ 2064.346953] dlm_posix_unlock+0xec/0x720 [dlm]\n[ 2064.348811] do_lock_file_wait.part.32+0xca/0x1d0\n[ 2064.351070] fcntl_setlk+0x281/0xbc0\n[ 2064.352879] do_fcntl+0x5e4/0xfe0\n[ 2064.354657] __x64_sys_fcntl+0x11f/0x170\n[ 2064.356550] do_syscall_64+0x3a/0x80\n[ 2064.358259] entry_SYSCALL_64_after_hwframe+0x44/0xae\n[ 2064.360745]\n[ 2064.361511] Last potentially related work creation:\n[ 2064.363957] kasan_save_stack+0x1c/0x40\n[ 2064.365811] __kasan_record_aux_stack+0xaf/0xc0\n[ 2064.368100] call_rcu+0x11b/0xf70\n[ 2064.369785] dlm_process_incoming_buffer+0x47d/0xfd0 [dlm]\n[ 2064.372404] receive_from_sock+0x290/0x770 [dlm]\n[ 2064.374607] process_recv_sockets+0x32/0x40 [dlm]\n[ 2064.377290] process_one_work+0x9a8/0x16e0\n[ 2064.379357] worker_thread+0x87/0xbf0\n[ 2064.381188] kthread+0x3ac/0x490\n[ 2064.383460] ret_from_fork+0x22/0x30\n[ 2064.385588]\n[ 2064.386518] Second to last potentially related work creation:\n[ 2064.389219] kasan_save_stack+0x1c/0x40\n[ 2064.391043] __kasan_record_aux_stack+0xaf/0xc0\n[ 2064.393303] call_rcu+0x11b/0xf70\n[ 2064.394885] dlm_process_incoming_buffer+0x47d/0xfd0 [dlm]\n[ 2064.397694] receive_from_sock+0x290/0x770 \n---truncated---", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "586759f03e2e9031ac5589912a51a909ed53c30a", "status": "affected", "versionType": "git", "lessThan": "2c55155cc365861044d9e6e80e342693e8805e33" }, { "version": "586759f03e2e9031ac5589912a51a909ed53c30a", "status": "affected", "versionType": "git", "lessThan": "72f2f68970f9bdc252d59e119b385a6441b0b155" }, { "version": "586759f03e2e9031ac5589912a51a909ed53c30a", "status": "affected", "versionType": "git", "lessThan": "5a1765adf9855cf0f6d3f7e0eb4b78ca66f70dee" }, { "version": "586759f03e2e9031ac5589912a51a909ed53c30a", "status": "affected", "versionType": "git", "lessThan": "49cd9eb7b9a7b88124b31e31f8e539acaf1b3a6d" }, { "version": "586759f03e2e9031ac5589912a51a909ed53c30a", "status": "affected", "versionType": "git", "lessThan": "899bc4429174861122f0c236588700a4710c1fec" }, { "version": "586759f03e2e9031ac5589912a51a909ed53c30a", "status": "affected", "versionType": "git", "lessThan": "acdad5bc9827922ec2f2e84fd198718aa8e8ab92" }, { "version": "586759f03e2e9031ac5589912a51a909ed53c30a", "status": "affected", "versionType": "git", "lessThan": "56aa8d1fbd02357f3bf81bdfba1cde87ce8402fc" }, { "version": "586759f03e2e9031ac5589912a51a909ed53c30a", "status": "affected", "versionType": "git", "lessThan": "e421872fa17542cf33747071fb141b0130ce9ef7" }, { "version": "586759f03e2e9031ac5589912a51a909ed53c30a", "status": "affected", "versionType": "git", "lessThan": "42252d0d2aa9b94d168241710a761588b3959019" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "2.6.22", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "2.6.22" }, { "version": "4.9.318", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "4.9.*" }, { "version": "4.14.283", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "4.14.*" }, { "version": "4.19.247", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "4.19.*" }, { "version": "5.4.198", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.4.*" }, { "version": "5.10.121", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.46", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "5.17.14", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.17.*" }, { "version": "5.18.3", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.18.*" }, { "version": "5.19", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }