NetSight
IP …
medium5.5

CVE-2025-39847

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 ret…

Impact

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.

Affected products

VendorProductAffected versions
LinuxLinux Kernel
from 2.6.15 before 5.4.299
from 5.5 before 5.10.243
from 5.11 before 5.15.192
from 5.16 before 6.1.151
from 6.2 before 6.6.105
from 6.7 before 6.12.46
DebianDebian Linux
Version 11.0

Weakness classification

CWE-401

References