CVE-2024-49983ext4: drop ppath from ext4_ext_replay_update_ex() to avoid double-free
- 7.8HighCVSS base score
- 0.25%Exploitation in 30 daysEPSS · top 83% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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.
Timeline
ID reserved
By Linux
Published
- 22 months later
· 22 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.25% · top 83% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 – < 8c26d9e53e5fbacda0732a577e97c5a5b7882aaf
- affected 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 – < a34bed978364114390162c27e50fca50791c568d
- affected 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 – < 6367d3f04c69e2b8770b8137bd800e0784b0abbc
- affected 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 – < 1b558006d98b7b0b730027be0ee98973dd10ee0d
- affected 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 – < 3ff710662e8d86a63a39b334e9ca0cb10e5c14b0
- affected 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 – < 63adc9016917e6970fb0104ee5fd6770f02b2d80
- affected 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 – < 5c0f4cc84d3a601c99bc5e6e6eb1cbda542cce95
- affected 5.10
- unaffected < 5.10
- unaffected 5.10.227 – ≤ 5.10.*
- unaffected 5.15.168 – ≤ 5.15.*
- unaffected 6.1.113 – ≤ 6.1.*
- unaffected 6.6.55 – ≤ 6.6.*
- unaffected 6.10.14 – ≤ 6.10.*
- unaffected 6.11.3 – ≤ 6.11.*
- unaffected 6.12 – ≤ *
References
References9
- https://git.kernel.org/stable/c/8c26d9e53e5fbacda0732a577e97c5a5b7882aaf (opens in a new tab)
- https://git.kernel.org/stable/c/a34bed978364114390162c27e50fca50791c568d (opens in a new tab)
- https://git.kernel.org/stable/c/6367d3f04c69e2b8770b8137bd800e0784b0abbc (opens in a new tab)
- https://git.kernel.org/stable/c/1b558006d98b7b0b730027be0ee98973dd10ee0d (opens in a new tab)
- https://git.kernel.org/stable/c/3ff710662e8d86a63a39b334e9ca0cb10e5c14b0 (opens in a new tab)
- https://git.kernel.org/stable/c/63adc9016917e6970fb0104ee5fd6770f02b2d80 (opens in a new tab)
- https://git.kernel.org/stable/c/5c0f4cc84d3a601c99bc5e6e6eb1cbda542cce95 (opens in a new tab)
- https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html (opens in a new tab)
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2024-43661 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2024-49983)Record last updated .