CVE-2026-89789

Katalog CVE

CVSS 7.8 · High EPSS 0,16%

Skor CVSS 3.1 7.8 (High) menurut CNA.

Deskripsi (NVD)

In the Linux kernel, the following vulnerability has been resolved: gtp: add synchronize_net() in gtp_newlink() error path to prevent use-after-free gtp_newlink()'s error path frees tid_hash and addr_hash without waiting for an RCU grace period after clearing sk_user_data. A concurrent gtp_encap_recv() in softirq may still hold the gtp_dev pointer obtained via rcu_dereference_sk_user_data() and access the freed memory. BUG: KASAN: slab-use-after-free in gtp0_pdp_find+0x1f6/0x200 (gtp.c:152) Call Trace: <IRQ> gtp0_pdp_find+0x1f6/0x200 gtp_encap_recv+0x527/0x24b0 udp_queue_rcv_one_skb+0x75f/0xc10 Add synchronize_net() before the kfree calls in out_hashtable, which covers all error paths from both gtp_encap_enable() and gtp_create_sockets().

Rincian

Terbit di NVD

16 September 2026

Terakhir diubah

16 September 2026

Status NVD

Received

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

EPSS (30 hari)

0,16% peluang dieksploitasi; lebih tinggi dari 5,1% CVE lain

Produk dan versi terdampak

NVD belum mencantumkan data produk (CPE) untuk CVE ini. Produk yang terdampak biasanya disebut di deskripsi dan di advisory vendor pada daftar referensi.

Referensi dan perbaikan

• https://git.kernel.org/stable/c/3ca3da5c305caa873ddb81e8c6b118143f6dd3d1
• https://git.kernel.org/stable/c/6f815c2fb6ab20385f81c353cdad0ea3b88132af
• https://git.kernel.org/stable/c/7677eb2cbf2cc7446de474c01a6b06277c0051e5
• https://git.kernel.org/stable/c/8d85498016a5bb56339734a14c276209fa65bafc
• https://git.kernel.org/stable/c/d989e22ae9802c52c56ad4284d0caf26696cf6ae
• https://git.kernel.org/stable/c/e3b9aa0773abd5d4ed90be41ce5306c146d5b09e
• https://git.kernel.org/stable/c/fcafb2b1430824bae4258c01a439ec97ca0c6973
• https://git.kernel.org/stable/c/fd8396cfecbd904468c71362f08aaa25f96d5337