CVE-2025-39847
published 2025-09-19CVE-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…
medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
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
30 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | debian_linux | — | — |
| debian | linux | < linux 6.1.153-1 (bookworm) | linux 6.1.153-1 (bookworm) |
| debian | linux-6.1 | < linux 6.1.153-1 (bookworm) | linux 6.1.153-1 (bookworm) |
| linux | linux | — | — |
| linux | linux | >= b3f9b92a6ec1a9a5e4b4b36e484f2f62cc73277c < 9ca6a040f76c0b149293e430dabab446f3fc8ab7 | 9ca6a040f76c0b149293e430dabab446f3fc8ab7 |
| linux | linux | >= b3f9b92a6ec1a9a5e4b4b36e484f2f62cc73277c < 87a35a36742df328d0badf4fbc2e56061c15846c | 87a35a36742df328d0badf4fbc2e56061c15846c |
| linux | linux | >= b3f9b92a6ec1a9a5e4b4b36e484f2f62cc73277c < 0b21e9cd4559102da798bdcba453b64ecd7be7ee | 0b21e9cd4559102da798bdcba453b64ecd7be7ee |
| linux | linux | >= b3f9b92a6ec1a9a5e4b4b36e484f2f62cc73277c < 1d8b354eafb8876d8bdb1bef69c7d2438aacfbe8 | 1d8b354eafb8876d8bdb1bef69c7d2438aacfbe8 |
| linux | linux | >= b3f9b92a6ec1a9a5e4b4b36e484f2f62cc73277c < 85c1c86a67e09143aa464e9bf09c397816772348 | 85c1c86a67e09143aa464e9bf09c397816772348 |
| linux | linux | >= b3f9b92a6ec1a9a5e4b4b36e484f2f62cc73277c < 631fc8ab5beb9e0ec8651fb9875b9a968e7b4ae4 | 631fc8ab5beb9e0ec8651fb9875b9a968e7b4ae4 |
| linux | linux | >= b3f9b92a6ec1a9a5e4b4b36e484f2f62cc73277c < 33a5bac5f14772730d2caf632ae97b6c2ee95044 | 33a5bac5f14772730d2caf632ae97b6c2ee95044 |
| linux | linux | >= b3f9b92a6ec1a9a5e4b4b36e484f2f62cc73277c < 4844123fe0b853a4982c02666cb3fd863d701d50 | 4844123fe0b853a4982c02666cb3fd863d701d50 |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 0 < 5.10.244-1 | 5.10.244-1 |
| linux | linux_kernel | >= 0 < 6.1.153-1 | 6.1.153-1 |
| linux | linux_kernel | >= 0 < 6.12.48-1 | 6.12.48-1 |
| linux | linux_kernel | >= 0 < 6.16.6-1 | 6.16.6-1 |
| linux | linux_kernel | >= 0 < 5.15.0-163.173 | 5.15.0-163.173 |
| linux | linux_kernel | >= 0 < 6.8.0-106.106 | 6.8.0-106.106 |
| linux | linux_kernel | >= 2.6.15 < 5.4.299 | 5.4.299 |
| linux | linux_kernel | >= 5.11 < 5.15.192 | 5.15.192 |
| linux | linux_kernel | >= 5.16 < 6.1.151 | 6.1.151 |
| linux | linux_kernel | >= 5.5 < 5.10.243 | 5.10.243 |
| linux | linux_kernel | >= 6.13 < 6.16.6 | 6.16.6 |
| linux | linux_kernel | >= 6.2 < 6.6.105 | 6.6.105 |
CVSS provenance
nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv5.5MEDIUM