CVE-2023-53796

f2fs: fix information leak in f2fs_move_inline_dirents()

N/A

Published: December 9, 2025 at 12:00 AM UTC

Updated: June 17, 2026 at 06:46 AM UTC

1 product affected across 1 vendorLinux Kernel

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Severity

N/A

Exploit prediction

EPSS 0.2%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel · Linux

95%

4.3 ≤ v < 4.14.3084.3 ≤ v < 4.19.2764.3 ≤ v < 5.10.1734.3 ≤ v < 5.15.994.3 ≤ v < 5.4.2354.3 ≤ v < 6.1.164.3 ≤ v < 6.2.34.3 ≤ v < 6.34.34ec17d688d74b6b7cb10043c57ff4818cde2b0ca

Vendor states this is fixed in 00b5587326625d0fddb2a5f5a3d4acd950102ace (fixed)

Vendor states this is fixed in 117d4f6687b1f74423b5d398ea95c63b262a8e73 (fixed)

Vendor states this is fixed in 2bef8314fcf94ddc27e22d03f237c0fafd00de33 (fixed)

Vendor states this is fixed in 4e3b4b170bd43db1d8a93a6bd0ea434b17cc86f7 (fixed)

Vendor states this is fixed in 9a5571cff4ffcfc24847df9fd545cc5799ac0ee5 (fixed)

Vendor states this is fixed in a6807ef0f3b3d8508d3b07a2e35de8a91820a014 (fixed)

Vendor states this is fixed in eebaecef0095bb8f493c03982da75c6e7bae1056 (fixed)

Vendor states this is fixed in f07a8d61b6ea81bb3cbe0638af40f8824d6147fd (fixed)

Vendor states this is fixed in 4.14.308 (unaffected)

Vendor states this is fixed in 4.19.276 (unaffected)

Vendor states this is fixed in 4.3 (unaffected)

Vendor states this is fixed in 5.10.173 (unaffected)