CVE-2023-53796
Description
In the Linux kernel, the following vulnerability has been resolved: f2fs: fix information leak in f2fs_move_inline_dirents() When converting an inline directory to a regular one, f2fs is leaking uninitialized memory to disk because it doesn't initialize the entire directory block. Fix this by zero-initializing the block. This bug was introduced by commit 4ec17d688d74 ("f2fs: avoid unneeded initializing when converting inline dentry"), which didn't consider the security implications of leaking uninitialized memory to disk. This was found by running xfstest generic/435 on a KMSAN-enabled kernel.
How to fix
- Linux Linux4e3b4b170bd43db1d8a93a6bd0ea434b17cc86f7, a6807ef0f3b3d8508d3b07a2e35de8a91820a014, 2bef8314fcf94ddc27e22d03f237c0fafd00de33, 00b5587326625d0fddb2a5f5a3d4acd950102ace, 117d4f6687b1f74423b5d398ea95c63b262a8e73, f07a8d61b6ea81bb3cbe0638af40f8824d6147fd, eebaecef0095bb8f493c03982da75c6e7bae1056, 9a5571cff4ffcfc24847df9fd545cc5799ac0ee5 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 4ec17d688d74b6b7cb10043c57ff4818cde2b0ca ≤ v < 4e3b4b170bd43db1d8a93a6bd0ea434b17cc86f7, 4ec17d688d74b6b7cb10043c57ff4818cde2b0ca ≤ v < a6807ef0f3b3d8508d3b07a2e35de8a91820a014, 4ec17d688d74b6b7cb10043c57ff4818cde2b0ca ≤ v < 2bef8314fcf94ddc27e22d03f237c0fafd00de33, 4ec17d688d74b6b7cb10043c57ff4818cde2b0ca ≤ v < 00b5587326625d0fddb2a5f5a3d4acd950102ace, 4ec17d688d74b6b7cb10043c57ff4818cde2b0ca ≤ v < 117d4f6687b1f74423b5d398ea95c63b262a8e73, 4ec17d688d74b6b7cb10043c57ff4818cde2b0ca ≤ v < f07a8d61b6ea81bb3cbe0638af40f8824d6147fd, 4ec17d688d74b6b7cb10043c57ff4818cde2b0ca ≤ v < eebaecef0095bb8f493c03982da75c6e7bae1056, 4ec17d688d74b6b7cb10043c57ff4818cde2b0ca ≤ v < 9a5571cff4ffcfc24847df9fd545cc5799ac0ee5, 4.3 | 4e3b4b170bd43db1d8a93a6bd0ea434b17cc86f7, a6807ef0f3b3d8508d3b07a2e35de8a91820a014, 2bef8314fcf94ddc27e22d03f237c0fafd00de33, 00b5587326625d0fddb2a5f5a3d4acd950102ace, 117d4f6687b1f74423b5d398ea95c63b262a8e73, f07a8d61b6ea81bb3cbe0638af40f8824d6147fd, eebaecef0095bb8f493c03982da75c6e7bae1056, 9a5571cff4ffcfc24847df9fd545cc5799ac0ee5 |
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