🛡️ AZL-40082 — kernel

⚪ Unknown ✅ No Known Exploit OSV
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

CVE-2024-26901 affecting package kernel for versions less than 6.6.29.1-3

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.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability high.

Affected software

AZL-40082 is recorded against 1 package.

  • kernel (fixed in 6.6.29.1-3)

Timeline and source

Published on 17 April 2024 and last revised on 21 April 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

nvd.nist.gov (Web)

Details

Severity Unknown
CVSS Score N/A
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE N/A
Public Exploit ✅ No
Source OSV
Published 2024-04-17
Updated 2026-08-12
Modified 2026-04-21
Fix URL N/A

Affected Packages

Software From version Fixed in
kernel — 6.6.29.1-3

Similar Threats

Free Vulnerability Check

Is your site affected by AZL-40082?

BotEraser helps you identify potentially vulnerable plugins and themes by checking your installation against AZL-40082 and other known CVE records.

Scan My Site Free →

No credit card required  ·  Results in minutes

ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.