CVE-2024-27022fork: defer linking file vma until vma is fully initialized
- 7.8HighCVSS base score
- 0.27%Exploitation in 30 daysEPSS · top 80% 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: fork: defer linking file vma until vma is fully initialized Thorvald reported a WARNING [1]. And the root cause is below race: CPU 1 CPU 2 fork hugetlbfs_fallocate dup_mmap hugetlbfs_punch_hole i_mmap_lock_write(mapping); vma_interval_tree_insert_after -- Child vma is visible through i_mmap tree. i_mmap_unlock_write(mapping); hugetlb_dup_vma_private -- Clear vma_lock outside i_mmap_rwsem! i_mmap_lock_write(mapping); hugetlb_vmdelete_list vma_interval_tree_foreach hugetlb_vma_trylock_write -- Vma_lock is cleared. tmp->vm_ops->open -- Alloc new vma_lock outside i_mmap_rwsem! hugetlb_vma_unlock_write -- Vma_lock is assigned!!! i_mmap_unlock_write(mapping); hugetlb_dup_vma_private() and hugetlb_vm_op_open() are called outside i_mmap_rwsem lock while vma lock can be used in the same time. Fix this by deferring linking file vma until vma is fully initialized. Those vmas should be initialized first before they can be used.
Timeline
ID reserved
By Linux
- 2 months later
· 2 months later
Published
- 2 years later
· 2 years 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)
- 0.27% · top 80% 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 8d9bfb2608145cf3e408428c224099e1585471af – < 087de0e15e6830ed630c793fa4bebd62e8348da1
- affected 8d9bfb2608145cf3e408428c224099e1585471af – < 2e5cbab8ccbfc7d4a3d8a21d3c2a1f2c1aa29b5b
- affected 8d9bfb2608145cf3e408428c224099e1585471af – < abdb88dd272bbeb93efe01d8e0b7b17e24af3a34
- affected 8d9bfb2608145cf3e408428c224099e1585471af – < 35e351780fa9d8240dd6f7e4f245f9ea37e96c19
- affected 6.1
- unaffected < 6.1
- unaffected 6.1.191 – ≤ 6.1.*
- unaffected 6.6.134 – ≤ 6.6.*
- unaffected 6.8.8 – ≤ 6.8.*
- unaffected 6.9 – ≤ *
References
References11
- https://git.kernel.org/stable/c/087de0e15e6830ed630c793fa4bebd62e8348da1 (opens in a new tab)
- https://git.kernel.org/stable/c/2e5cbab8ccbfc7d4a3d8a21d3c2a1f2c1aa29b5b (opens in a new tab)
- https://git.kernel.org/stable/c/abdb88dd272bbeb93efe01d8e0b7b17e24af3a34 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/35e351780fa9d8240dd6f7e4f245f9ea37e96c19 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/0c42f7e039aba3de6d7dbf92da708e2b2ecba557 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/04b0c41912349aff11a1bbaef6a722bd7fbb90ac (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/cec11fa2eb512ebe3a459c185f4aca1d44059bbf (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/dd782da470761077f4d1120e191f1a35787cda6e (opens in a new tab)x_transferred
- https://lists.fedoraproject.org/archives/list/[email protected]/message/DAMSOZXJEPUOXW33WZYWCVAY7Z5S7OOY/ (opens in a new tab)
- https://lists.fedoraproject.org/archives/list/[email protected]/message/4EZ6PJW7VOZ224TD7N4JZNU6KV32ZJ53/ (opens in a new tab)
- https://lists.fedoraproject.org/archives/list/[email protected]/message/GCBZZEC7L7KTWWAS2NLJK6SO3IZIL4WW/ (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-2024-24284 (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-2024-27022)Record last updated .