{"cve":"CVE-2022-49062","nvd":{"published":"2025-02-26T07:00:43.450","modified":"2026-06-17T05:16:58.490","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ncachefiles: Fix KASAN slab-out-of-bounds in cachefiles_set_volume_xattr\n\nUse the actual length of volume coherency data when setting the\nxattr to avoid the following KASAN report.\n\n BUG: KASAN: slab-out-of-bounds in cachefiles_set_volume_xattr+0xa0/0x350 [cachefiles]\n Write of size 4 at addr ffff888101e02af4 by task kworker/6:0/1347\n\n CPU: 6 PID: 1347 Comm: kworker/6:0 Kdump: loaded Not tainted 5.18.0-rc1-nfs-fscache-netfs+ #13\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-4.fc34 04/01/2014\n Workqueue: events fscache_create_volume_work [fscache]\n Call Trace:\n  <TASK>\n  dump_stack_lvl+0x45/0x5a\n  print_report.cold+0x5e/0x5db\n  ? __lock_text_start+0x8/0x8\n  ? cachefiles_set_volume_xattr+0xa0/0x350 [cachefiles]\n  kasan_report+0xab/0x120\n  ? cachefiles_set_volume_xattr+0xa0/0x350 [cachefiles]\n  kasan_check_range+0xf5/0x1d0\n  memcpy+0x39/0x60\n  cachefiles_set_volume_xattr+0xa0/0x350 [cachefiles]\n  cachefiles_acquire_volume+0x2be/0x500 [cachefiles]\n  ? __cachefiles_free_volume+0x90/0x90 [cachefiles]\n  fscache_create_volume_work+0x68/0x160 [fscache]\n  process_one_work+0x3b7/0x6a0\n  worker_thread+0x2c4/0x650\n  ? process_one_work+0x6a0/0x6a0\n  kthread+0x16c/0x1a0\n  ? kthread_complete_and_exit+0x20/0x20\n  ret_from_fork+0x22/0x30\n  </TASK>\n\n Allocated by task 1347:\n  kasan_save_stack+0x1e/0x40\n  __kasan_kmalloc+0x81/0xa0\n  cachefiles_set_volume_xattr+0x76/0x350 [cachefiles]\n  cachefiles_acquire_volume+0x2be/0x500 [cachefiles]\n  fscache_create_volume_work+0x68/0x160 [fscache]\n  process_one_work+0x3b7/0x6a0\n  worker_thread+0x2c4/0x650\n  kthread+0x16c/0x1a0\n  ret_from_fork+0x22/0x30\n\n The buggy address belongs to the object at ffff888101e02af0\n which belongs to the cache kmalloc-8 of size 8\n The buggy address is located 4 bytes inside of\n 8-byte region [ffff888101e02af0, ffff888101e02af8)\n\n The buggy address belongs to the physical page:\n page:00000000a2292d70 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101e02\n flags: 0x17ffffc0000200(slab|node=0|zone=2|lastcpupid=0x1fffff)\n raw: 0017ffffc0000200 0000000000000000 dead000000000001 ffff888100042280\n raw: 0000000000000000 0000000080660066 00000001ffffffff 0000000000000000\n page dumped because: kasan: bad access detected\n\n Memory state around the buggy address:\n ffff888101e02980: fc 00 fc fc fc fc 00 fc fc fc fc 00 fc fc fc fc\n ffff888101e02a00: 00 fc fc fc fc 00 fc fc fc fc 00 fc fc fc fc 00\n >ffff888101e02a80: fc fc fc fc 00 fc fc fc fc 00 fc fc fc fc 04 fc\n                                                            ^\n ffff888101e02b00: fc fc fc 00 fc fc fc fc 00 fc fc fc fc 00 fc fc\n ffff888101e02b80: fc fc 00 fc fc fc fc 00 fc fc fc fc 00 fc fc fc\n ==================================================================","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8},"cwes":["CWE-787"],"references":["https://git.kernel.org/stable/c/09a5df1b88c8f126c8ff9938edf160edd4e92f42","https://git.kernel.org/stable/c/7b2f6c306601240635c72caa61f682e74d4591b2"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:59:48.811064707+00:00"},"epss":{"cve":"CVE-2022-49062","score":0.00256,"percentile":0.17307,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}