CVE-2024-26901do_sys_name_to_handle(): use kzalloc() to fix kernel-infoleak
- 5.3MediumCVSS base score
- 0.83%Exploitation in 30 daysEPSS · top 42% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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.
Timeline
ID reserved
By Linux
- 58 days later
· 58 days later
Published
- 2 years later
· 2 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | Medium5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.83% · top 42% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.3.
Affected products
- affected 990d6c2d7aee921e3bce22b2d6a750fd552262be – < 4bac28f441e3cc9d3f1a84c8d023228a68d8a7c1
- affected 990d6c2d7aee921e3bce22b2d6a750fd552262be – < 772a7def9868091da3bcb0d6c6ff9f0c03d7fa8b
- affected 990d6c2d7aee921e3bce22b2d6a750fd552262be – < cde76b3af247f615447bcfecf610bb76c3529126
- affected 990d6c2d7aee921e3bce22b2d6a750fd552262be – < 423b6bdf19bbc5e1f7e7461045099917378f7e71
- affected 990d6c2d7aee921e3bce22b2d6a750fd552262be – < e6450d5e46a737a008b4885aa223486113bf0ad6
- affected 990d6c2d7aee921e3bce22b2d6a750fd552262be – < c1362eae861db28b1608b9dc23e49634fe87b63b
- affected 990d6c2d7aee921e3bce22b2d6a750fd552262be – < cba138f1ef37ec6f961baeab62f312dedc7cf730
- affected 990d6c2d7aee921e3bce22b2d6a750fd552262be – < bf9ec1b24ab4e94345aa1c60811dd329f069c38b
- affected 990d6c2d7aee921e3bce22b2d6a750fd552262be – < 3948abaa4e2be938ccdfc289385a27342fb13d43
- affected 2.6.39
- unaffected < 2.6.39
- unaffected 4.19.311 – ≤ 4.19.*
- unaffected 5.4.273 – ≤ 5.4.*
- unaffected 5.10.214 – ≤ 5.10.*
- unaffected 5.15.153 – ≤ 5.15.*
- unaffected 6.1.83 – ≤ 6.1.*
- unaffected 6.6.23 – ≤ 6.6.*
- unaffected 6.7.11 – ≤ 6.7.*
- unaffected 6.8.2 – ≤ 6.8.*
- unaffected 6.9 – ≤ *
References
References13
- https://git.kernel.org/stable/c/4bac28f441e3cc9d3f1a84c8d023228a68d8a7c1 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/772a7def9868091da3bcb0d6c6ff9f0c03d7fa8b (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/cde76b3af247f615447bcfecf610bb76c3529126 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/423b6bdf19bbc5e1f7e7461045099917378f7e71 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/e6450d5e46a737a008b4885aa223486113bf0ad6 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/c1362eae861db28b1608b9dc23e49634fe87b63b (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/cba138f1ef37ec6f961baeab62f312dedc7cf730 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/bf9ec1b24ab4e94345aa1c60811dd329f069c38b (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/3948abaa4e2be938ccdfc289385a27342fb13d43 (opens in a new tab)x_transferred
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html (opens in a new tab)x_transferred
- https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html (opens in a new tab)x_transferred
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2024-24163 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2024-26901)Record last updated .