CVE-2025-38465

Katalog CVE

CVSS 5.5 · Medium EPSS 0,18%

Kerentanan Missing Release of Memory after Effective Lifetime pada linux kernel, debian linux. Skor CVSS 3.1 5.5 (Medium) menurut NVD.

Deskripsi (NVD)

In the Linux kernel, the following vulnerability has been resolved: netlink: Fix wraparounds of sk->sk_rmem_alloc. Netlink has this pattern in some places if (atomic_read(&sk->sk_rmem_alloc) > sk->sk_rcvbuf) atomic_add(skb->truesize, &sk->sk_rmem_alloc); , which has the same problem fixed by commit 5a465a0da13e ("udp: Fix multiple wraparounds of sk->sk_rmem_alloc."). For example, if we set INT_MAX to SO_RCVBUFFORCE, the condition is always false as the two operands are of int. Then, a single socket can eat as many skb as possible until OOM happens, and we can see multiple wraparounds of sk->sk_rmem_alloc. Let's fix it by using atomic_add_return() and comparing the two variables as unsigned int. Before: [root@fedora ~]# ss -f netlink Recv-Q Send-Q Local Address:Port Peer Address:Port -1668710080 0 rtnl:nl_wraparound/293 * After: [root@fedora ~]# ss -f netlink Recv-Q Send-Q Local Address:Port Peer Address:Port 2147483072 0 rtnl:nl_wraparound/290 * ^ `--- INT_MAX - 576

Rincian

Terbit di NVD

25 Juli 2025

Terakhir diubah

17 Juni 2026

Status NVD

Modified

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-401: Missing Release of Memory after Effective Lifetime

EPSS (30 hari)

0,18% peluang dieksploitasi; lebih tinggi dari 6,4% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://git.kernel.org/stable/c/4b8e18af7bea92f8b7fb92d40aeae729209db250 patch
• https://git.kernel.org/stable/c/55baecb9eb90238f60a8350660d6762046ebd3bd patch
• https://git.kernel.org/stable/c/76602d8e13864524382b0687dc32cd8f19164d5a patch
• https://git.kernel.org/stable/c/9da025150b7c14a8390fc06aea314c0a4011e82c patch
• https://git.kernel.org/stable/c/ae8f160e7eb24240a2a79fc4c815c6a0d4ee16cc patch
• https://git.kernel.org/stable/c/c4ceaac5c5ba0b992ee1dc88e2a02421549e5c98 patch
• https://git.kernel.org/stable/c/cd7ff61bfffd7000143c42bbffb85eeb792466d6 patch
• https://git.kernel.org/stable/c/fd69af06101090eaa60b3d216ae715f9c0a58e5b patch
• https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html advisory pihak ketiga
• https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html advisory pihak ketiga
• https://cert-portal.siemens.com/productcert/html/ssa-082556.html