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🛡️ CVE-2024-56534 — kernel

🟡 CVSS 5.5 — Medium ✅ No Known Exploit NVD
5.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

isofs: avoid memory leak in iocharset

In the Linux kernel, the following vulnerability has been resolved:

isofs: avoid memory leak in iocharset

A memleak was found as below:

unreferenced object 0xffff0000d10164d8 (size 8):

comm "pool-udisksd", pid 108217, jiffies 4295408555

hex dump (first 8 bytes):

75 74 66 38 00 cc cc cc utf8....

backtrace (crc de430d31):

[<ffff800081046e6c>] kmemleak_alloc+0xb8/0xc8

[<ffff8000803e6c3c>] __kmalloc_node_track_caller_noprof+0x380/0x474

[<ffff800080363b74>] kstrdup+0x70/0xfc

[<ffff80007bb3c6a4>] isofs_parse_param+0x228/0x2c0 [isofs]

[<ffff8000804d7f68>] vfs_parse_fs_param+0xf4/0x164

[<ffff8000804d8064>] vfs_parse_fs_string+0x8c/0xd4

[<ffff8000804d815c>] vfs_parse_monolithic_sep+0xb0/0xfc

[<ffff8000804d81d8>] generic_parse_monolithic+0x30/0x3c

[<ffff8000804d8bfc>] parse_monolithic_mount_data+0x40/0x4c

[<ffff8000804b6a64>] path_mount+0x6c4/0x9ec

[<ffff8000804b6e38>] do_mount+0xac/0xc4

[<ffff8000804b7494>] __arm64_sys_mount+0x16c/0x2b0

[<ffff80008002b8dc>] invoke_syscall+0x7c/0x104

[<ffff80008002ba44>] el0_svc_common.constprop.1+0xe0/0x104

[<ffff80008002ba94>] do_el0_svc+0x2c/0x38

[<ffff800081041108>] el0_svc+0x3c/0x1b8

The opt->iocharset is freed inside the isofs_fill_super function,

But there may be situations where it's not possible to

enter this function.

For example, in the get_tree_bdev_flags function,when

encountering the situation where "Can't mount, would change RO state,"

In such a case, isofs_fill_super will not have the opportunity

to be called,which means that opt->iocharset will not have the chance

to be freed,ultimately leading to a memory leak.

Let's move the memory freeing of opt->iocharset into

isofs_free_fc function.

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.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

  • Attack vector: Local — a local account, shell or session on the host is needed.
  • Attack complexity: Low — the attack works reliably, with no preparation.
  • Privileges required: Low — an ordinary user account is enough.
  • User interaction: None — nobody has to be tricked into anything.
  • Scope: Unchanged — the damage stays inside the vulnerable component.
  • Confidentiality impact: None.
  • Integrity impact: None.
  • Availability impact: High — total loss, or loss the attacker controls.

Affected software

CVE-2024-56534 is recorded against 2 packages.

  • kernel (from 6.12.0 up to 6.12.2)
  • linux-kernel (from 6.12 up to 6.12.2)

Timeline and source

Published on 27 December 2024 and last revised on 12 August 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
github.com (Advisory)
nvd.nist.gov (Advisory)
git.kernel.org (Package)

Other advisories for this package

kernel has other advisories on record. If you are patching this one, these are worth checking on the same host:

CVE-2024-56534 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity Medium
CVSS Score 5.5
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 NVD
Published 2024-12-27
Updated 2026-08-20
Modified 2026-08-12

Affected Packages

Software From version Fixed in
kernel 6.12.0 6.12.2
linux-kernel 6.12 6.12.2

Similar Threats

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ⓘ 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.

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