CVE-2025-39847In 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.
Updated under an hour ago ()
Does this affect you?
It affects linux_kernel and 1 other product. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Free account, 1 product
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.
- CVSS
- 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-401
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Modified
- Record last updated
- Oct 19, 2026
- First seen by InfoSec Signals
- Oct 19, 2026
Affected products
linux linux_kernel linux:linux_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; from 6.13 before 6.16.6; 6.17; and 3 more ranges | NVD |
debian debian_linux debian:debian_linux | 11.0 | NVD |
References
- https://git.kernel.org/stable/c/0b21e9cd4559102da798bdcba453b64ecd7be7eepatch
- https://git.kernel.org/stable/c/1d8b354eafb8876d8bdb1bef69c7d2438aacfbe8patch
- https://git.kernel.org/stable/c/33a5bac5f14772730d2caf632ae97b6c2ee95044patch
- https://git.kernel.org/stable/c/4844123fe0b853a4982c02666cb3fd863d701d50patch
- https://git.kernel.org/stable/c/631fc8ab5beb9e0ec8651fb9875b9a968e7b4ae4patch
- https://git.kernel.org/stable/c/85c1c86a67e09143aa464e9bf09c397816772348patch
- https://git.kernel.org/stable/c/87a35a36742df328d0badf4fbc2e56061c15846cpatch
- https://git.kernel.org/stable/c/9ca6a040f76c0b149293e430dabab446f3fc8ab7patch
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.htmlmailing-list, third-party-advisory
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.htmlmailing-list, third-party-advisory
- https://cert-portal.siemens.com/productcert/html/ssa-032379.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.