5.5

CVE-2024-26901: linux Use of Uninitialized Resource

CVSS: 5.5v3.1MediumModified
AliasesUBUNTU-CVE-2024-26901DEBIAN-CVE-2024-26901
Published 17-04-2024Last modified 15-10-2026
Open JSON

Vulnerability summary

CVE-2024-26901 is a medium (CVSS 5.5) Use of Uninitialized Resource vulnerability in linux. EPSS estimates a 0.83% chance of exploitation in the next 30 days, higher than 56.7% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.83%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 42 · Related 35
DLA-3840-1DLA-3842-1DSA-5681-1RHSA-2024:3618RHSA-2024:3627RHSA-2024:9315

Timeline

  1. 17-04-2024
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.83%

Chance of exploitation in the next 30 days

Percentile

57%

Versus all other CVEs

30-day change

0.00 pp

From 0.83% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.83%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubuntu117 products
  • linuxAll versions (No fix recorded) | < 4.4.0-257.291 | < 4.15.0-227.239 | < 5.4.0-189.209 | < 5.15.0-112.122 | < 6.8.0-35.35
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 4.4.0-1134.140 | < 4.4.0-1172.187 | < 4.15.0-1170.183 | < 5.4.0-1128.138 | < 5.15.0-1063.69 | < 6.8.0-1009.9
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 990d6c2d7aee921e3bce22b2d6a750fd552262be, < 4bac28f441e3cc9d3f1a84c8d023228a68d8a7c1 | ≥ 990d6c2d7aee921e3bce22b2d6a750fd552262be, < 772a7def9868091da3bcb0d6c6ff9f0c03d7fa8b | ≥ 990d6c2d7aee921e3bce22b2d6a750fd552262be, < cde76b3af247f615447bcfecf610bb76c3529126 | ≥ 990d6c2d7aee921e3bce22b2d6a750fd552262be, < 423b6bdf19bbc5e1f7e7461045099917378f7e71 | ≥ 990d6c2d7aee921e3bce22b2d6a750fd552262be, < e6450d5e46a737a008b4885aa223486113bf0ad6 | ≥ 990d6c2d7aee921e3bce22b2d6a750fd552262be, < c1362eae861db28b1608b9dc23e49634fe87b63b | ≥ 990d6c2d7aee921e3bce22b2d6a750fd552262be, < cba138f1ef37ec6f961baeab62f312dedc7cf730 | ≥ 990d6c2d7aee921e3bce22b2d6a750fd552262be, < bf9ec1b24ab4e94345aa1c60811dd329f069c38b | ≥ 990d6c2d7aee921e3bce22b2d6a750fd552262be, < 3948abaa4e2be938ccdfc289385a27342fb13d43 | 2.6.39
  • linux_kernel≥ 2.6.39, < 4.19.311 | ≥ 4.20, < 5.4.273 | ≥ 5.5, < 5.10.214 | ≥ 5.11, < 5.15.153 | ≥ 5.16, < 6.1.83 | ≥ 6.2, < 6.6.23 | ≥ 6.7, < 6.7.11 | ≥ 6.8, < 6.8.2
Debian1 product
  • linux< 6.1.85-1 | < 6.7.12-1

3 vendors · 120 products

References

42 links
Show all 42 references