CVE-2024-49983

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Source
https://cve.org/CVERecord?id=CVE-2024-49983
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2024-49983.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2024-49983
Downstream
Related
Published
2024-10-21T18:02:28.474Z
Modified
2026-03-20T12:39:29.792817Z
Summary
ext4: drop ppath from ext4_ext_replay_update_ex() to avoid double-free
Details

In the Linux kernel, the following vulnerability has been resolved:

ext4: drop ppath from ext4extreplayupdateex() to avoid double-free

When calling ext4forcesplitextentat() in ext4extreplayupdateex(), the 'ppath' is updated but it is the 'path' that is freed, thus potentially triggering a double-free in the following process:

ext4extreplayupdateex ppath = path ext4forcesplitextentat(&ppath) ext4splitextentat ext4extinsertextent ext4extcreatenewleaf ext4extgrowindepth ext4findextent if (depth > path[0].pmaxdepth) kfree(path) ---> path First freed *orig_path = path = NULL ---> null ppath kfree(path) ---> path double-free !!!

So drop the unnecessary ppath and use path directly to avoid this problem. And use ext4findextent() directly to update path, avoiding unnecessary memory allocation and freeing. Also, propagate the error returned by ext4findextent() instead of using strange error codes.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/49xxx/CVE-2024-49983.json",
    "cna_assigner": "Linux"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2
Fixed
8c26d9e53e5fbacda0732a577e97c5a5b7882aaf
Fixed
a34bed978364114390162c27e50fca50791c568d
Fixed
6367d3f04c69e2b8770b8137bd800e0784b0abbc
Fixed
1b558006d98b7b0b730027be0ee98973dd10ee0d
Fixed
3ff710662e8d86a63a39b334e9ca0cb10e5c14b0
Fixed
63adc9016917e6970fb0104ee5fd6770f02b2d80
Fixed
5c0f4cc84d3a601c99bc5e6e6eb1cbda542cce95

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2024-49983.json"