--- id: CVE-2024-26901 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 follo… summary: |- 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 follo… severity: medium cvss: 5.5 cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H' cwe: - CWE-908 vendor: linux product: linux_kernel affected: - 'linux_kernel >= 2.6.39, < 4.19.311' - 'linux_kernel >= 4.20, < 5.4.273' - 'linux_kernel >= 5.5, < 5.10.214' - 'linux_kernel >= 5.11, < 5.15.153' - 'linux_kernel >= 5.16, < 6.1.83' - 'linux_kernel >= 6.2, < 6.6.23' - 'linux_kernel >= 6.7, < 6.7.11' - 'linux_kernel >= 6.8, < 6.8.2' patched: - linux_kernel 6.8.2 published: '2024-04-17' updated: '2026-10-15' sourceUpdated: '2026-10-15T01:17:30.863' source: NVD sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2024-26901' references: - url: 'https://git.kernel.org/stable/c/3948abaa4e2be938ccdfc289385a27342fb13d43' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/423b6bdf19bbc5e1f7e7461045099917378f7e71' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/4bac28f441e3cc9d3f1a84c8d023228a68d8a7c1' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/772a7def9868091da3bcb0d6c6ff9f0c03d7fa8b' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/bf9ec1b24ab4e94345aa1c60811dd329f069c38b' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/c1362eae861db28b1608b9dc23e49634fe87b63b' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/cba138f1ef37ec6f961baeab62f312dedc7cf730' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/cde76b3af247f615447bcfecf610bb76c3529126' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/e6450d5e46a737a008b4885aa223486113bf0ad6' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/3948abaa4e2be938ccdfc289385a27342fb13d43' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://git.kernel.org/stable/c/423b6bdf19bbc5e1f7e7461045099917378f7e71' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://git.kernel.org/stable/c/4bac28f441e3cc9d3f1a84c8d023228a68d8a7c1' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://git.kernel.org/stable/c/772a7def9868091da3bcb0d6c6ff9f0c03d7fa8b' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://git.kernel.org/stable/c/bf9ec1b24ab4e94345aa1c60811dd329f069c38b' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://git.kernel.org/stable/c/c1362eae861db28b1608b9dc23e49634fe87b63b' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://git.kernel.org/stable/c/cba138f1ef37ec6f961baeab62f312dedc7cf730' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://git.kernel.org/stable/c/cde76b3af247f615447bcfecf610bb76c3529126' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://git.kernel.org/stable/c/e6450d5e46a737a008b4885aa223486113bf0ad6' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://cert-portal.siemens.com/productcert/html/ssa-265688.html' label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e - url: 'https://cert-portal.siemens.com/productcert/html/ssa-398330.html' label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e tags: - nvd - cve.org epss: 0.00828 epssPercentile: 0.57311 ingestedAt: '2026-10-15T03:30:12.659Z' ssvc: exploitation: none automatable: 'no' technicalImpact: partial timestamp: '2024-07-16T15:11:22.418196Z' scores: nvd: 5.5 adp: 5.3 --- ## Overview 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]. [1] "BUG: KMSAN: kernel-infoleak in instrument_copy_to_user include/linux/instrumented.h:114 [inline] BUG: KMSAN: kernel-infoleak in _copy_to_user+0xbc/0x100 lib/usercopy.c:40 instrument_copy_to_user include/linux/instrumented.h:114 [inline] _copy_to_user+0xbc/0x100 lib/usercopy.c:40 copy_to_user include/linux/uaccess.h:191 [inline] do_sys_name_to_handle fs/fhandle.c:73 [inline] __do_sys_name_to_handle_at fs/fhandle.c:112 [inline] __se_sys_name_to_handle_at+0x949/0xb10 fs/fhandle.c:94 __x64_sys_name_to_handle_at+0xe4/0x140 fs/fhandle.c:94 ... Uninit was created at: slab_post_alloc_hook+0x129/0xa70 mm/slab.h:768 slab_alloc_node mm/slub.c:3478 [inline] __kmem_cache_alloc_node+0x5c9/0x970 mm/slub.c:3517 __do_kmalloc_node mm/slab_common.c:1006 [inline] __kmalloc+0x121/0x3c0 mm/slab_common.c:1020 kmalloc include/linux/slab.h:604 [inline] do_sys_name_to_handle fs/fhandle.c:39 [inline] __do_sys_name_to_handle_at fs/fhandle.c:112 [inline] __se_sys_name_to_handle_at+0x441/0xb10 fs/fhandle.c:94 __x64_sys_name_to_handle_at+0xe4/0x140 fs/fhandle.c:94 ... Bytes 18-19 of 20 are uninitialized Memory access of size 20 starts at ffff888128a46380 Data copied to user address 0000000020000240" Per Chuck Lever's suggestion, use kzalloc() instead of kmalloc() to solve the problem. ## Affected - `linux_kernel >= 2.6.39, < 4.19.311` - `linux_kernel >= 4.20, < 5.4.273` - `linux_kernel >= 5.5, < 5.10.214` - `linux_kernel >= 5.11, < 5.15.153` - `linux_kernel >= 5.16, < 6.1.83` - `linux_kernel >= 6.2, < 6.6.23` - `linux_kernel >= 6.7, < 6.7.11` - `linux_kernel >= 6.8, < 6.8.2` ## Remediation Upgrade past the affected range: - `linux_kernel 6.8.2`