{ "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-2022-48913", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2022-48913", "idYear": 2022, "status": "PUBLISHED", "publishedAt": "2024-08-22T01:31:34.860Z", "updatedAt": "2026-08-05T08:52:53.708Z", "importedAt": "2026-10-24T01:56:45.230Z", "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": "blktrace: fix use after free for struct blk_trace", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nblktrace: fix use after free for struct blk_trace\n\nWhen tracing the whole disk, 'dropped' and 'msg' will be created\nunder 'q->debugfs_dir' and 'bt->dir' is NULL, thus blk_trace_free()\nwon't remove those files. What's worse, the following UAF can be\ntriggered because of accessing stale 'dropped' and 'msg':\n\n==================================================================\nBUG: KASAN: use-after-free in blk_dropped_read+0x89/0x100\nRead of size 4 at addr ffff88816912f3d8 by task blktrace/1188\n\nCPU: 27 PID: 1188 Comm: blktrace Not tainted 5.17.0-rc4-next-20220217+ #469\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS ?-20190727_073836-4\nCall Trace:\n \n dump_stack_lvl+0x34/0x44\n print_address_description.constprop.0.cold+0xab/0x381\n ? blk_dropped_read+0x89/0x100\n ? blk_dropped_read+0x89/0x100\n kasan_report.cold+0x83/0xdf\n ? blk_dropped_read+0x89/0x100\n kasan_check_range+0x140/0x1b0\n blk_dropped_read+0x89/0x100\n ? blk_create_buf_file_callback+0x20/0x20\n ? kmem_cache_free+0xa1/0x500\n ? do_sys_openat2+0x258/0x460\n full_proxy_read+0x8f/0xc0\n vfs_read+0xc6/0x260\n ksys_read+0xb9/0x150\n ? vfs_write+0x3d0/0x3d0\n ? fpregs_assert_state_consistent+0x55/0x60\n ? exit_to_user_mode_prepare+0x39/0x1e0\n do_syscall_64+0x35/0x80\n entry_SYSCALL_64_after_hwframe+0x44/0xae\nRIP: 0033:0x7fbc080d92fd\nCode: ce 20 00 00 75 10 b8 00 00 00 00 0f 05 48 3d 01 f0 ff ff 73 31 c3 48 83 1\nRSP: 002b:00007fbb95ff9cb0 EFLAGS: 00000293 ORIG_RAX: 0000000000000000\nRAX: ffffffffffffffda RBX: 00007fbb95ff9dc0 RCX: 00007fbc080d92fd\nRDX: 0000000000000100 RSI: 00007fbb95ff9cc0 RDI: 0000000000000045\nRBP: 0000000000000045 R08: 0000000000406299 R09: 00000000fffffffd\nR10: 000000000153afa0 R11: 0000000000000293 R12: 00007fbb780008c0\nR13: 00007fbb78000938 R14: 0000000000608b30 R15: 00007fbb780029c8\n \n\nAllocated by task 1050:\n kasan_save_stack+0x1e/0x40\n __kasan_kmalloc+0x81/0xa0\n do_blk_trace_setup+0xcb/0x410\n __blk_trace_setup+0xac/0x130\n blk_trace_ioctl+0xe9/0x1c0\n blkdev_ioctl+0xf1/0x390\n __x64_sys_ioctl+0xa5/0xe0\n do_syscall_64+0x35/0x80\n entry_SYSCALL_64_after_hwframe+0x44/0xae\n\nFreed by task 1050:\n kasan_save_stack+0x1e/0x40\n kasan_set_track+0x21/0x30\n kasan_set_free_info+0x20/0x30\n __kasan_slab_free+0x103/0x180\n kfree+0x9a/0x4c0\n __blk_trace_remove+0x53/0x70\n blk_trace_ioctl+0x199/0x1c0\n blkdev_common_ioctl+0x5e9/0xb30\n blkdev_ioctl+0x1a5/0x390\n __x64_sys_ioctl+0xa5/0xe0\n do_syscall_64+0x35/0x80\n entry_SYSCALL_64_after_hwframe+0x44/0xae\n\nThe buggy address belongs to the object at ffff88816912f380\n which belongs to the cache kmalloc-96 of size 96\nThe buggy address is located 88 bytes inside of\n 96-byte region [ffff88816912f380, ffff88816912f3e0)\nThe buggy address belongs to the page:\npage:000000009a1b4e7c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0f\nflags: 0x17ffffc0000200(slab|node=0|zone=2|lastcpupid=0x1fffff)\nraw: 0017ffffc0000200 ffffea00044f1100 dead000000000002 ffff88810004c780\nraw: 0000000000000000 0000000000200020 00000001ffffffff 0000000000000000\npage dumped because: kasan: bad access detected\n\nMemory state around the buggy address:\n ffff88816912f280: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc\n ffff88816912f300: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc\n>ffff88816912f380: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc\n ^\n ffff88816912f400: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc\n ffff88816912f480: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc\n==================================================================", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "c0ea57608b691d6cde8aff23e11f9858a86b5918", "status": "affected", "versionType": "git", "lessThan": "78acc7dbd84a8c173a08584750845c31611160f2" }, { "version": "c0ea57608b691d6cde8aff23e11f9858a86b5918", "status": "affected", "versionType": "git", "lessThan": "6418634238ade86f2b08192928787f39d8afb58c" }, { "version": "c0ea57608b691d6cde8aff23e11f9858a86b5918", "status": "affected", "versionType": "git", "lessThan": "30939293262eb433c960c4532a0d59c4073b2b84" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "5.12", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "5.12" }, { "version": "5.15.27", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "5.16.13", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.16.*" }, { "version": "5.17", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }