CVE-2021-47259

Katalog CVE

CVSS 7.8 · High EPSS 0,71%

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

Deskripsi (NVD)

In the Linux kernel, the following vulnerability has been resolved: NFS: Fix use-after-free in nfs4_init_client() KASAN reports a use-after-free when attempting to mount two different exports through two different NICs that belong to the same server. Olga was able to hit this with kernels starting somewhere between 5.7 and 5.10, but I traced the patch that introduced the clear_bit() call to 4.13. So something must have changed in the refcounting of the clp pointer to make this call to nfs_put_client() the very last one.

Rincian

Terbit di NVD

21 Mei 2024

Terakhir diubah

4 Agustus 2026

Status NVD

Modified

CVSS 3.1

7.8 (High), sumber CNA
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)

0,71% peluang dieksploitasi; lebih tinggi dari 52,4% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://git.kernel.org/stable/c/3e3c7ebbfac152d08be75c92802a64a1f6471a15 patch
• https://git.kernel.org/stable/c/42c10b0db064e45f5c5ae7019bbf2168ffab766c patch
• https://git.kernel.org/stable/c/476bdb04c501fc64bf3b8464ffddefc8dbe01577 patch
• https://git.kernel.org/stable/c/72651c6579a25317a90536181d311c663d0329ab patch
• https://git.kernel.org/stable/c/c3b6cf64dfe4ef96e7341508d50d6998da7062c7 patch
• https://git.kernel.org/stable/c/c7eab9e2d7b4e983ce280276fb920af649955897 patch