CVE-2025-39847

Katalog CVE

CVSS 5.5 · Medium EPSS 0,16%

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: ppp: fix memory leak in pad_compress_skb If alloc_skb() fails in pad_compress_skb(), it returns NULL without releasing the old skb. The caller does: skb = pad_compress_skb(ppp, skb); if (!skb) goto drop; drop: kfree_skb(skb); When pad_compress_skb() returns NULL, the reference to the old skb is lost and kfree_skb(skb) ends up doing nothing, leading to a memory leak. Align pad_compress_skb() semantics with realloc(): only free the old skb if allocation and compression succeed. At the call site, use the new_skb variable so the original skb is not lost when pad_compress_skb() fails.

Rincian

Terbit di NVD

19 September 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)

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

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://git.kernel.org/stable/c/0b21e9cd4559102da798bdcba453b64ecd7be7ee patch
• https://git.kernel.org/stable/c/1d8b354eafb8876d8bdb1bef69c7d2438aacfbe8 patch
• https://git.kernel.org/stable/c/33a5bac5f14772730d2caf632ae97b6c2ee95044 patch
• https://git.kernel.org/stable/c/4844123fe0b853a4982c02666cb3fd863d701d50 patch
• https://git.kernel.org/stable/c/631fc8ab5beb9e0ec8651fb9875b9a968e7b4ae4 patch
• https://git.kernel.org/stable/c/85c1c86a67e09143aa464e9bf09c397816772348 patch
• https://git.kernel.org/stable/c/87a35a36742df328d0badf4fbc2e56061c15846c patch
• https://git.kernel.org/stable/c/9ca6a040f76c0b149293e430dabab446f3fc8ab7 patch
• https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html mailing list · advisory pihak ketiga
• https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html mailing list · advisory pihak ketiga
• https://cert-portal.siemens.com/productcert/html/ssa-032379.html