Answer in brief
CVE-2024-26901 records a Medium severity (CVSS 5.3) vulnerability in do_sys_name_to_handle(): use kzalloc() to fix kernel-infoleak. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (generic), Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 5.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (generic), Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=990d6c2d7aee921e3bce22b2d6a750fd552262be <4bac28f441e3cc9d3f1a84c8d023228a68d8a7c1 || >=990d6c2d7aee921e3bce22b2d6a750fd552262be <772a7def9868091da3bcb0d6c6ff9f0c03d7fa8b || >=990d6c2d7aee921e3bce22b2d6a750fd552262be <cde76b3af247f615447bcfecf610bb76c3529126 || >=990d6c2d7aee921e3bce22b2d6a750fd552262be <423b6bdf19bbc5e1f7e7461045099917378f7e71 || >=990d6c2d7aee921e3bce22b2d6a750fd552262be <e6450d5e46a737a008b4885aa223486113bf0ad6 || >=990d6c2d7aee921e3bce22b2d6a750fd552262be <c1362eae861db28b1608b9dc23e49634fe87b63b || >=990d6c2d7aee921e3bce22b2d6a750fd552262be <cba138f1ef37ec6f961baeab62f312dedc7cf730 || >=990d6c2d7aee921e3bce22b2d6a750fd552262be <bf9ec1b24ab4e94345aa1c60811dd329f069c38b || >=990d6c2d7aee921e3bce22b2d6a750fd552262be <3948abaa4e2be938ccdfc289385a27342fb13d43 | 4bac28f441e3cc9d3f1a84c8d023228a68d8a7c1, 772a7def9868091da3bcb0d6c6ff9f0c03d7fa8b, cde76b3af247f615447bcfecf610bb76c3529126, 423b6bdf19bbc5e1f7e7461045099917378f7e71, e6450d5e46a737a008b4885aa223486113bf0ad6, c1362eae861db28b1608b9dc23e49634fe87b63b, cba138f1ef37ec6f961baeab62f312dedc7cf730, bf9ec1b24ab4e94345aa1c60811dd329f069c38b, 3948abaa4e2be938ccdfc289385a27342fb13d43 |
| Linux/Linuxgeneric | 2.6.39 | Not reported |
| Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.0 <V3.1.5 | V3.1.5 |
| Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFPgeneric | >=V3.1.0 <V3.1.5 | V3.1.5 |
| Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystemgeneric | >=0 <V1.1.1 | V1.1.1 |
| Siemens/SIPLUS S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.0 <V3.1.5 | V3.1.5 |
Published upstream
Apr 17, 2024
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 15, 2026
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.
Quoted source text, attributed separately from HOL analysis.