CVE-2026-63868: linux kernel

csirt@kutim:~/threat-intel/cve/CVE-2026-63868

CVSS 5.5 · Medium EPSS 0,12%

Kerentanan Integer Underflow (Wrap or Wraparound) pada linux kernel. Skor CVSS 3.1 5.5 (Medium) menurut NVD.

Deskripsi (NVD)

In the Linux kernel, the following vulnerability has been resolved: net: garp: fix unsigned integer underflow in garp_pdu_parse_attr The receive-side GARP attribute parser computes dlen with reversed operands: dlen = sizeof(*ga) - ga->len; ga->len is the on-wire attribute length and includes the GARP attribute header. For normal attributes with data, ga->len is larger than sizeof(*ga), so the subtraction underflows in unsigned arithmetic. The resulting value is later passed to garp_attr_lookup(), whose length argument is u8. After truncation, the parsed data length usually no longer matches the length stored for locally registered attributes, so received Join/Leave events are ignored. This breaks the GARP receive path for common attributes, such as GVRP VLAN registration attributes. Compute the data length as the attribute length minus the header length.

Rincian

Terbit di NVD: 19 Juli 2026
Terakhir diubah: 26 Oktober 2026
Status NVD: Analyzed
CVSS 3.1: 5.5 (Medium), sumber NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H · uraikan di kalkulator
Jenis kelemahan (CWE): CWE-191: Integer Underflow (Wrap or Wraparound)
EPSS (30 hari): 0,12% peluang dieksploitasi; lebih tinggi dari 1,9% CVE lain

Produk dan versi terdampak

Vendor	Produk	Versi terdampak
linux	linux kernel	Versi 2.6.27 hingga sebelum 5.10.259
linux	linux kernel	Versi 5.11 hingga sebelum 5.15.210
linux	linux kernel	Versi 5.16 hingga sebelum 6.1.176
linux	linux kernel	Versi 6.2 hingga sebelum 6.6.143
linux	linux kernel	Versi 6.7 hingga sebelum 6.12.94
linux	linux kernel	Versi 6.13 hingga sebelum 6.18.36
linux	linux kernel	Versi 6.19 hingga sebelum 7.0.13
linux	linux kernel	Versi 7.1 rc1
linux	linux kernel	Versi 7.1 rc2
linux	linux kernel	Versi 7.1 rc3
linux	linux kernel	Versi 7.1 rc4
linux	linux kernel	Versi 7.1 rc5
linux	linux kernel	Versi 7.1 rc6

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

Sumber: NVD · CVE.org · EPSS. Halaman ini disusun otomatis dari data tersebut; pembaruan terakhir 27 Okt 2026, 06:28 WITA. Kalau sistem di Perangkat Daerah memakai produk ini dan butuh bantuan, laporkan lewat kanal pelaporan.