CVE-2025-39847None▾ SunlitIn 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_com…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Nov 5.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.2%
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.
Linux >= b3f9b92a6ec1a9a5e4b4b36e484f2f62cc73277c < 9ca6a040f76c0b149293e430dabab446f3fc8ab7Linux >= b3f9b92a6ec1a9a5e4b4b36e484f2f62cc73277c < 87a35a36742df328d0badf4fbc2e56061c15846cLinux >= b3f9b92a6ec1a9a5e4b4b36e484f2f62cc73277c < 0b21e9cd4559102da798bdcba453b64ecd7be7eeLinux >= b3f9b92a6ec1a9a5e4b4b36e484f2f62cc73277c < 1d8b354eafb8876d8bdb1bef69c7d2438aacfbe8Linux >= b3f9b92a6ec1a9a5e4b4b36e484f2f62cc73277c < 85c1c86a67e09143aa464e9bf09c397816772348Linux >= b3f9b92a6ec1a9a5e4b4b36e484f2f62cc73277c < 631fc8ab5beb9e0ec8651fb9875b9a968e7b4ae4Linux >= b3f9b92a6ec1a9a5e4b4b36e484f2f62cc73277c < 33a5bac5f14772730d2caf632ae97b6c2ee95044Linux >= b3f9b92a6ec1a9a5e4b4b36e484f2f62cc73277c < 4844123fe0b853a4982c02666cb3fd863d701d50Linux 2.6.15Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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