---
cve: "CVE-2024-56534"
severity: "MEDIUM"
cvss: 5.5
epss: "25%"
vendor: "Linux"
kev: false
exploited: false
published: "2024-12-27 14:15:32"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-09T15:32:39+02:00"
---

# CVE-2024-56534

> 5.5 MEDIUM

## Beschreibung

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):
    [] kmemleak_alloc+0xb8/0xc8
    [] __kmalloc_node_track_caller_noprof+0x380/0x474
    [] kstrdup+0x70/0xfc
    [] isofs_parse_param+0x228/0x2c0 [isofs]
    [] vfs_parse_fs_param+0xf4/0x164
    [] vfs_parse_fs_string+0x8c/0xd4
    [] vfs_parse_monolithic_sep+0xb0/0xfc
    [] generic_parse_monolithic+0x30/0x3c
    [] parse_monolithic_mount_data+0x40/0x4c
    [] path_mount+0x6c4/0x9ec
    [] do_mount+0xac/0xc4
    [] __arm64_sys_mount+0x16c/0x2b0
    [] invoke_syscall+0x7c/0x104
    [] el0_svc_common.constprop.1+0xe0/0x104
    [] do_el0_svc+0x2c/0x38
    [] 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.

## CVSS-Vektor

```
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Lokal | good |
| AC Komplexität | Gering | bad |
| PR Privilegien | Gering | warn |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Keine | good |
| I Integrität | Keine | good |
| A Verfügbarkeit | Hoch | bad |

## Patch verfügbar (OSV)

- Kernel ≥ 6.11.11
- Kernel ≥ 6.12.2

## Referenzen

- <https://git.kernel.org/stable/c/34f090ddb3630a26e5a6b220bf3bfaf5c7b70393>
- <https://git.kernel.org/stable/c/0fbab266ca8000333c966f5b58cb9b9cac658573>
- <https://git.kernel.org/stable/c/0b5bbeee4de616a268db77e2f40f19ab010a367b>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2024-56534) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_