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CVE-2023-53796

UnknownEPSS 0.18%

Last modified

CVE-2023-53796 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 0.18% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability
0.18%

7.4th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 4ec17d688d74b6b7cb10043c57ff4818cde2b0ca, < 4e3b4b170bd43db1d8a93a6bd0ea434b17cc86f7; >= 4ec17d688d74b6b7cb10043c57ff4818cde2b0ca, < a6807ef0f3b3d8508d3b07a2e35de8a91820a014; >= 4ec17d688d74b6b7cb10043c57ff4818cde2b0ca, < 2bef8314fcf94ddc27e22d03f237c0fafd00de33; >= 4ec17d688d74b6b7cb10043c57ff4818cde2b0ca, < 00b5587326625d0fddb2a5f5a3d4acd950102ace; >= 4ec17d688d74b6b7cb10043c57ff4818cde2b0ca, < 117d4f6687b1f74423b5d398ea95c63b262a8e73; >= 4ec17d688d74b6b7cb10043c57ff4818cde2b0ca, < f07a8d61b6ea81bb3cbe0638af40f8824d6147fd; >= 4ec17d688d74b6b7cb10043c57ff4818cde2b0ca, < eebaecef0095bb8f493c03982da75c6e7bae1056; >= 4ec17d688d74b6b7cb10043c57ff4818cde2b0ca, < 9a5571cff4ffcfc24847df9fd545cc5799ac0ee5
LinuxLinux4.3

References

Timeline

Published
Last Modified
Status
Deferred

Frequently Asked Questions

What is CVE-2023-53796?
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 severe is CVE-2023-53796?
Severity scoring for CVE-2023-53796 is pending analysis. The EPSS model estimates a 0.18% probability of exploitation in the next 30 days.
How do I fix CVE-2023-53796?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST