CVE-2024-49983 (GCVE-0-2024-49983)

Vulnerability from cvelistv5 – Published: 2024-10-21 18:02 – Updated: 2025-11-03 22:24
VLAI?
Title
ext4: drop ppath from ext4_ext_replay_update_ex() to avoid double-free
Summary
In the Linux kernel, the following vulnerability has been resolved: ext4: drop ppath from ext4_ext_replay_update_ex() to avoid double-free When calling ext4_force_split_extent_at() in ext4_ext_replay_update_ex(), the 'ppath' is updated but it is the 'path' that is freed, thus potentially triggering a double-free in the following process: ext4_ext_replay_update_ex ppath = path ext4_force_split_extent_at(&ppath) ext4_split_extent_at ext4_ext_insert_extent ext4_ext_create_new_leaf ext4_ext_grow_indepth ext4_find_extent if (depth > path[0].p_maxdepth) 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 ext4_find_extent() directly to update path, avoiding unnecessary memory allocation and freeing. Also, propagate the error returned by ext4_find_extent() instead of using strange error codes.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 , < 8c26d9e53e5fbacda0732a577e97c5a5b7882aaf (git)
Affected: 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 , < a34bed978364114390162c27e50fca50791c568d (git)
Affected: 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 , < 6367d3f04c69e2b8770b8137bd800e0784b0abbc (git)
Affected: 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 , < 1b558006d98b7b0b730027be0ee98973dd10ee0d (git)
Affected: 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 , < 3ff710662e8d86a63a39b334e9ca0cb10e5c14b0 (git)
Affected: 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 , < 63adc9016917e6970fb0104ee5fd6770f02b2d80 (git)
Affected: 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 , < 5c0f4cc84d3a601c99bc5e6e6eb1cbda542cce95 (git)
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    Linux Linux Affected: 5.10
Unaffected: 0 , < 5.10 (semver)
Unaffected: 5.10.227 , ≤ 5.10.* (semver)
Unaffected: 5.15.168 , ≤ 5.15.* (semver)
Unaffected: 6.1.113 , ≤ 6.1.* (semver)
Unaffected: 6.6.55 , ≤ 6.6.* (semver)
Unaffected: 6.10.14 , ≤ 6.10.* (semver)
Unaffected: 6.11.3 , ≤ 6.11.* (semver)
Unaffected: 6.12 , ≤ * (original_commit_for_fix)
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