CVE-2026-31657

Katalog CVE

CVSS 9.8 · Critical EPSS 0,76%

Kerentanan NULL Pointer Dereference pada linux kernel. Skor CVSS 3.1 9.8 (Critical) menurut CNA.

Deskripsi (NVD)

In the Linux kernel, the following vulnerability has been resolved: batman-adv: hold claim backbone gateways by reference batadv_bla_add_claim() can replace claim->backbone_gw and drop the old gateway's last reference while readers still follow the pointer. The netlink claim dump path dereferences claim->backbone_gw->orig and takes claim->backbone_gw->crc_lock without pinning the underlying backbone gateway. batadv_bla_check_claim() still has the same naked pointer access pattern. Reuse batadv_bla_claim_get_backbone_gw() in both readers so they operate on a stable gateway reference until the read-side work is complete. This keeps the dump and claim-check paths aligned with the lifetime rules introduced for the other BLA claim readers.

Rincian

Terbit di NVD

24 April 2026

Terakhir diubah

17 Juni 2026

Status NVD

Modified

CVSS 3.1

9.8 (Critical), sumber CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-476: NULL Pointer Dereference

EPSS (30 hari)

0,76% peluang dieksploitasi; lebih tinggi dari 53,9% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://git.kernel.org/stable/c/1f2dc36c297d27733f1b380ea644cf15a361bd7b patch
• https://git.kernel.org/stable/c/2f55b58b5a0bbed192d60c444a45a49cdf1b545f patch
• https://git.kernel.org/stable/c/4dee4c0688443aaf5bbec74aa203c851d1d53c35 patch
• https://git.kernel.org/stable/c/7962b522222628596ca9ecc8722efc95367aadbd patch
• https://git.kernel.org/stable/c/82d8701b2c930d0e96b0dbc9115a218d791cb0d2 patch
• https://git.kernel.org/stable/c/f4858832ddef2f39f21e30b7226bbcd3c4b2bc96 patch
• https://git.kernel.org/stable/c/5202f071b367ffbc8e279fc7a00db14f5e587f52
• https://git.kernel.org/stable/c/69d1ce9c72eca91203ffdb8d08bacd511100aec6