{"id":"CVE-2024-26901","url":"https://www.cyber-defence.io/tools/cve/CVE-2024-26901","generatedAt":"2026-10-28T03:41:14.994Z","title":"In the Linux kernel, the following vulnerability has been resolved: do_sys_name_to_handle(): use kzalloc() to fix kernel-infoleak syzbot identified a kernel information leak vulnerability in do_sys_name_to_handle() and issued the following report [1].…","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndo_sys_name_to_handle(): use kzalloc() to fix kernel-infoleak\n\nsyzbot identified a kernel information leak vulnerability in\ndo_sys_name_to_handle() and issued the following report [1].\n\n[1]\n\"BUG: KMSAN: kernel-infoleak in instrument_copy_to_user include/linux/instrumented.h:114 [inline]\nBUG: KMSAN: kernel-infoleak in _copy_to_user+0xbc/0x100 lib/usercopy.c:40\n instrument_copy_to_user include/linux/instrumented.h:114 [inline]\n _copy_to_user+0xbc/0x100 lib/usercopy.c:40\n copy_to_user include/linux/uaccess.h:191 [inline]\n do_sys_name_to_handle fs/fhandle.c:73 [inline]\n __do_sys_name_to_handle_at fs/fhandle.c:112 [inline]\n __se_sys_name_to_handle_at+0x949/0xb10 fs/fhandle.c:94\n __x64_sys_name_to_handle_at+0xe4/0x140 fs/fhandle.c:94\n ...\n\nUninit was created at:\n slab_post_alloc_hook+0x129/0xa70 mm/slab.h:768\n slab_alloc_node mm/slub.c:3478 [inline]\n __kmem_cache_alloc_node+0x5c9/0x970 mm/slub.c:3517\n __do_kmalloc_node mm/slab_common.c:1006 [inline]\n __kmalloc+0x121/0x3c0 mm/slab_common.c:1020\n kmalloc include/linux/slab.h:604 [inline]\n do_sys_name_to_handle fs/fhandle.c:39 [inline]\n __do_sys_name_to_handle_at fs/fhandle.c:112 [inline]\n __se_sys_name_to_handle_at+0x441/0xb10 fs/fhandle.c:94\n __x64_sys_name_to_handle_at+0xe4/0x140 fs/fhandle.c:94\n ...\n\nBytes 18-19 of 20 are uninitialized\nMemory access of size 20 starts at ffff888128a46380\nData copied to user address 0000000020000240\"\n\nPer Chuck Lever's suggestion, use kzalloc() instead of kmalloc() to\nsolve the problem.","published":"2024-04-17T11:15:11.000Z","lastModified":"2026-10-15T01:17:31.000Z","status":"Modified","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","cvss":{"version":"3.1","score":5.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},"cwe":["CWE-908"],"affected":["linux/linux kernel"],"epss":{"score":0.00828,"percentile":0.57311,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.83%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://git.kernel.org/stable/c/3948abaa4e2be938ccdfc289385a27342fb13d43","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/423b6bdf19bbc5e1f7e7461045099917378f7e71","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/4bac28f441e3cc9d3f1a84c8d023228a68d8a7c1","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/772a7def9868091da3bcb0d6c6ff9f0c03d7fa8b","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/bf9ec1b24ab4e94345aa1c60811dd329f069c38b","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/c1362eae861db28b1608b9dc23e49634fe87b63b","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/cba138f1ef37ec6f961baeab62f312dedc7cf730","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/cde76b3af247f615447bcfecf610bb76c3529126","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e6450d5e46a737a008b4885aa223486113bf0ad6","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/3948abaa4e2be938ccdfc289385a27342fb13d43","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/423b6bdf19bbc5e1f7e7461045099917378f7e71","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/4bac28f441e3cc9d3f1a84c8d023228a68d8a7c1","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/772a7def9868091da3bcb0d6c6ff9f0c03d7fa8b","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/bf9ec1b24ab4e94345aa1c60811dd329f069c38b","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/c1362eae861db28b1608b9dc23e49634fe87b63b","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/cba138f1ef37ec6f961baeab62f312dedc7cf730","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/cde76b3af247f615447bcfecf610bb76c3529126","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/e6450d5e46a737a008b4885aa223486113bf0ad6","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-265688.html","source":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-398330.html","source":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2024-26901","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}