Description
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
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
b3f9b92a6ec1a9a5e4b4b36e484f2f62cc73277c to < 9ca6a040f76c0b149293e430dabab446f3fc8ab7affectedb3f9b92a6ec1a9a5e4b4b36e484f2f62cc73277c to < 87a35a36742df328d0badf4fbc2e56061c15846caffectedb3f9b92a6ec1a9a5e4b4b36e484f2f62cc73277c to < 0b21e9cd4559102da798bdcba453b64ecd7be7eeaffectedb3f9b92a6ec1a9a5e4b4b36e484f2f62cc73277c to < 1d8b354eafb8876d8bdb1bef69c7d2438aacfbe8affectedb3f9b92a6ec1a9a5e4b4b36e484f2f62cc73277c to < 85c1c86a67e09143aa464e9bf09c397816772348affectedb3f9b92a6ec1a9a5e4b4b36e484f2f62cc73277c to < 631fc8ab5beb9e0ec8651fb9875b9a968e7b4ae4affectedb3f9b92a6ec1a9a5e4b4b36e484f2f62cc73277c to < 33a5bac5f14772730d2caf632ae97b6c2ee95044affectedb3f9b92a6ec1a9a5e4b4b36e484f2f62cc73277c to < 4844123fe0b853a4982c02666cb3fd863d701d50affected
Linux Linux
Default version status: affected
2.6.15affected0 to < 2.6.15unaffected5.4.299 to ≤ 5.4.*unaffected5.10.243 to ≤ 5.10.*unaffected5.15.192 to ≤ 5.15.*unaffected6.1.151 to ≤ 6.1.*unaffected6.6.105 to ≤ 6.6.*unaffected6.12.46 to ≤ 6.12.*unaffected6.16.6 to ≤ 6.16.*unaffected6.17 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/9ca6a040f76c0b149293e430dabab446f3fc8ab7 ↗
- https://git.kernel.org/stable/c/87a35a36742df328d0badf4fbc2e56061c15846c ↗
- https://git.kernel.org/stable/c/0b21e9cd4559102da798bdcba453b64ecd7be7ee ↗
- https://git.kernel.org/stable/c/1d8b354eafb8876d8bdb1bef69c7d2438aacfbe8 ↗
- https://git.kernel.org/stable/c/85c1c86a67e09143aa464e9bf09c397816772348 ↗
- https://git.kernel.org/stable/c/631fc8ab5beb9e0ec8651fb9875b9a968e7b4ae4 ↗
- https://git.kernel.org/stable/c/33a5bac5f14772730d2caf632ae97b6c2ee95044 ↗
- https://git.kernel.org/stable/c/4844123fe0b853a4982c02666cb3fd863d701d50 ↗
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html ↗
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html ↗
- https://cert-portal.siemens.com/productcert/html/ssa-032379.html ↗