CVE-2024-56558

linux kernel

TLP:CLEAR

csirt@kutim:~/threat-intel/cve/CVE-2024-56558

Katalog CVE

CVSS 7.8 · High EPSS 0,24%

Kerentanan Use After Free pada linux kernel. Skor CVSS 3.1 7.8 (High) menurut CISA ADP.

Deskripsi (NVD)

In the Linux kernel, the following vulnerability has been resolved: nfsd: make sure exp active before svc_export_show The function `e_show` was called with protection from RCU. This only ensures that `exp` will not be freed. Therefore, the reference count for `exp` can drop to zero, which will trigger a refcount use-after-free warning when `exp_get` is called. To resolve this issue, use `cache_get_rcu` to ensure that `exp` remains active. ------------[ cut here ]------------ refcount_t: addition on 0; use-after-free. WARNING: CPU: 3 PID: 819 at lib/refcount.c:25 refcount_warn_saturate+0xb1/0x120 CPU: 3 UID: 0 PID: 819 Comm: cat Not tainted 6.12.0-rc3+ #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.1-2.fc37 04/01/2014 RIP: 0010:refcount_warn_saturate+0xb1/0x120 ... Call Trace: <TASK> e_show+0x20b/0x230 [nfsd] seq_read_iter+0x589/0x770 seq_read+0x1e5/0x270 vfs_read+0x125/0x530 ksys_read+0xc1/0x160 do_syscall_64+0x5f/0x170 entry_SYSCALL_64_after_hwframe+0x76/0x7e

Rincian

Terbit di NVD
27 Desember 2024
Terakhir diubah
17 Juni 2026
Status NVD
Modified
CVSS 3.1
7.8 (High), sumber CISA ADP
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H · uraikan di kalkulator
Jenis kelemahan (CWE)
CWE-416: Use After Free
EPSS (30 hari)
0,24% peluang dieksploitasi; lebih tinggi dari 14,3% CVE lain

Produk dan versi terdampak

VendorProdukVersi terdampak
linux linux kernel Versi 3.17 hingga sebelum 5.4.287
linux linux kernel Versi 5.5 hingga sebelum 5.10.231
linux linux kernel Versi 5.11 hingga sebelum 5.15.174
linux linux kernel Versi 5.16 hingga sebelum 6.1.120
linux linux kernel Versi 6.2 hingga sebelum 6.6.64
linux linux kernel Versi 6.7 hingga sebelum 6.12.4

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

Sumber: NVD · CVE.org · EPSS. Halaman ini disusun otomatis dari data tersebut; pembaruan terakhir 5 Okt 2026, 20:11 WITA. Kalau sistem di Perangkat Daerah memakai produk ini dan butuh bantuan, laporkan lewat kanal pelaporan.