ext4: avoid resizing to a partial cluster size
Priority LOW 24CWE-1284Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 22 fixed, 2 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat.
Summary
In the Linux kernel, the following vulnerability has been resolved: ext4: avoid resizing to a partial cluster size This patch avoids an attempt to resize the filesystem to an unaligned cluster boundary. An online resize to a size that is not integral to cluster size results in the last iteration attempting to grow the fs by a negative amount, which trips a BUG_ON and leaves the fs with a corrupted in-memory superblock.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00208 11th percentileScored 2026-11-07
Fix Partial Linux (Linux): 4.19.256, 5.4.211, 5.10.138 +3Red Hat: 11 advisoriesRed Hat: 22 fixed, 2 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 4.15 and later | 4.19.256, 5.4.211, 5.10.138, 5.15.63, 5.19.4, 6.0 | Patch available | CNA |
- Linux VendorLinux Affected 4.15 and later Fixed in 4.19.256, 5.4.211, 5.10.138, 5.15.63, 5.19.4, 6.0 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | before 4.9.326; 4.10 to before 4.14.291; 4.15 to before 4.19.256; 4.20 to before 5.4.211; 5.5 to before 5.10.138; 5.11 to before 5.15.63; 5.16 to before 5.19.4 | Vulnerable | Linux |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions before 4.9.326; 4.10 to before 4.14.291; 4.15 to before 4.19.256; 4.20 to before 5.4.211; 5.5 to before 5.10.138; 5.11 to before 5.15.63; 5.16 to before 5.19.4 Vulnerable ·Linux
Remediation
- Fix · CNA Linux (Linux) Fixed in 4.19.256, 5.4.211, 5.10.138, 5.15.63, 5.19.4, 6.0
Red Hat 11 advisories
- RHSA-2025:14748 Released 2025-08-27 · Red Hat rating Importantkernel security update
- Red Hat Enterprise Linux Server (v. 7 ELS) bpftool-3.10.0-1160.137.1.el7, kernel-3.10.0-1160.137.1.el7, kernel-abi-whitelists-3.10.0-1160.137.1.el7 +11
- Red Hat Enterprise Linux Server Optional (v. 7 ELS) kernel-debug-devel-3.10.0-1160.137.1.el7, kernel-tools-libs-devel-3.10.0-1160.137.1.el7
- RHSA-2025:14746 Released 2025-08-27 · Red Hat rating Importantkernel-rt security update
- Red Hat Enterprise Linux for Real Time (v. 7 ELS) kernel-rt-3.10.0-1160.137.1.rt56.1289.el7, kernel-rt-debug-3.10.0-1160.137.1.rt56.1289.el7, kernel-rt-debug-devel-3.10.0-1160.137.1.rt56.1289.el7 +4
- RHSA-2025:14418 Released 2025-08-25 · Red Hat rating Importantkernel security update
- Red Hat Enterprise Linux BaseOS E4S (v.8.8) bpftool-4.18.0-477.106.1.el8_8, kernel-4.18.0-477.106.1.el8_8, kernel-abi-stablelists-4.18.0-477.106.1.el8_8 +14
- Red Hat Enterprise Linux BaseOS TUS (v.8.8) bpftool-4.18.0-477.106.1.el8_8, kernel-4.18.0-477.106.1.el8_8, kernel-abi-stablelists-4.18.0-477.106.1.el8_8 +14
Show 8 more Red Hat advisories
- RHSA-2025:14136 Released 2025-08-20 · Red Hat rating Moderatekernel security update
- Red Hat Enterprise Linux BaseOS AUS (v. 8.2) bpftool-4.18.0-193.164.1.el8_2, kernel-4.18.0-193.164.1.el8_2, kernel-abi-whitelists-4.18.0-193.164.1.el8_2 +14
- RHSA-2025:14094 Released 2025-08-19 · Red Hat rating Moderatekernel-rt security update
- Red Hat Enterprise Linux NFV E4S (v.9.0) kernel-rt-5.14.0-70.142.1.rt21.214.el9_0, kernel-rt-core-5.14.0-70.142.1.rt21.214.el9_0, kernel-rt-debug-5.14.0-70.142.1.rt21.214.el9_0 +9
- Red Hat Enterprise Linux Real Time E4S (v.9.0) kernel-rt-5.14.0-70.142.1.rt21.214.el9_0, kernel-rt-core-5.14.0-70.142.1.rt21.214.el9_0, kernel-rt-debug-5.14.0-70.142.1.rt21.214.el9_0 +7
- RHSA-2025:14054 Released 2025-08-19 · Red Hat rating Importantkernel security update
- Red Hat Enterprise Linux AppStream E4S (v.9.0) kernel-debug-devel-5.14.0-70.142.1.el9_0, kernel-debug-devel-matched-5.14.0-70.142.1.el9_0, kernel-devel-5.14.0-70.142.1.el9_0 +5
- Red Hat Enterprise Linux BaseOS E4S (v.9.0) bpftool-5.14.0-70.142.1.el9_0, kernel-5.14.0-70.142.1.el9_0, kernel-abi-stablelists-5.14.0-70.142.1.el9_0 +14
- RHSA-2025:13805 Released 2025-08-13 · Red Hat rating Moderatekernel security update
- Red Hat Enterprise Linux BaseOS AUS (v.8.4) bpftool-4.18.0-305.168.1.el8_4, kernel-4.18.0-305.168.1.el8_4, kernel-abi-stablelists-4.18.0-305.168.1.el8_4 +14
- Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) bpftool-4.18.0-305.168.1.el8_4, kernel-4.18.0-305.168.1.el8_4, kernel-abi-stablelists-4.18.0-305.168.1.el8_4 +14
- RHSA-2025:13776 Released 2025-08-13 · Red Hat rating Importantkernel security update
- Red Hat Enterprise Linux BaseOS AUS (v.8.6) bpftool-4.18.0-372.157.1.el8_6, kernel-4.18.0-372.157.1.el8_6, kernel-abi-stablelists-4.18.0-372.157.1.el8_6 +14
- Red Hat Enterprise Linux BaseOS E4S (v.8.6) bpftool-4.18.0-372.157.1.el8_6, kernel-4.18.0-372.157.1.el8_6, kernel-abi-stablelists-4.18.0-372.157.1.el8_6 +19
- Red Hat Enterprise Linux BaseOS TUS (v.8.6) bpftool-4.18.0-372.157.1.el8_6, kernel-4.18.0-372.157.1.el8_6, kernel-abi-stablelists-4.18.0-372.157.1.el8_6 +14
- RHSA-2025:12752 Released 2025-08-04 · Red Hat rating Importantkernel security update
- Red Hat Enterprise Linux BaseOS (v. 8) bpftool-4.18.0-553.66.1.el8_10, kernel-4.18.0-553.66.1.el8_10, kernel-abi-stablelists-4.18.0-553.66.1.el8_10 +19
- Red Hat Enterprise Linux CRB (v. 8) kernel-tools-libs-devel-4.18.0-553.66.1.el8_10
- RHSA-2025:12753 Released 2025-08-04 · Red Hat rating Importantkernel-rt security update
- Red Hat Enterprise Linux NFV (v. 8) kernel-rt-4.18.0-553.66.1.rt7.407.el8_10, kernel-rt-core-4.18.0-553.66.1.rt7.407.el8_10, kernel-rt-debug-4.18.0-553.66.1.rt7.407.el8_10 +9
- Red Hat Enterprise Linux RT (v. 8) kernel-rt-4.18.0-553.66.1.rt7.407.el8_10, kernel-rt-core-4.18.0-553.66.1.rt7.407.el8_10, kernel-rt-debug-4.18.0-553.66.1.rt7.407.el8_10 +7
- RHSA-2023:2458 Released 2023-05-09 · Red Hat rating Importantkernel security, bug fix, and enhancement update
- Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-284.11.1.el9_2, kernel-64k-debug-devel-matched-5.14.0-284.11.1.el9_2, kernel-64k-devel-5.14.0-284.11.1.el9_2 +10
- Red Hat Enterprise Linux BaseOS (v. 9) bpftool-7.0.0-284.11.1.el9_2, kernel-5.14.0-284.11.1.el9_2, kernel-64k-5.14.0-284.11.1.el9_2 +29
- Red Hat Enterprise Linux CRB (v. 9) kernel-tools-libs-devel-5.14.0-284.11.1.el9_2
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 9 | Affected | No fix yet |
| Red Hat Enterprise Linux AppStream (v. 9) | Fixed | RHSA-2023:2458 |
| Red Hat Enterprise Linux AppStream E4S (v.9.0) | Fixed | RHSA-2025:14054 |
| Red Hat Enterprise Linux BaseOS (v. 8) | Fixed | RHSA-2025:12752 |
| Red Hat Enterprise Linux BaseOS (v. 9) | Fixed | RHSA-2023:2458 |
| Red Hat Enterprise Linux BaseOS AUS (v. 8.2) | Fixed | RHSA-2025:14136 |
| Red Hat Enterprise Linux BaseOS AUS (v.8.4) | Fixed | RHSA-2025:13805 |
| Red Hat Enterprise Linux BaseOS AUS (v.8.6) | Fixed | RHSA-2025:13776 |
| Red Hat Enterprise Linux BaseOS E4S (v.8.6) | Fixed | RHSA-2025:13776 |
| Red Hat Enterprise Linux BaseOS E4S (v.8.8) | Fixed | RHSA-2025:14418 |
| Red Hat Enterprise Linux BaseOS E4S (v.9.0) | Fixed | RHSA-2025:14054 |
| Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) | Fixed | RHSA-2025:13805 |
| Red Hat Enterprise Linux BaseOS TUS (v.8.6) | Fixed | RHSA-2025:13776 |
| Red Hat Enterprise Linux BaseOS TUS (v.8.8) | Fixed | RHSA-2025:14418 |
| Red Hat Enterprise Linux CRB (v. 8) | Fixed | RHSA-2025:12752 |
| Red Hat Enterprise Linux CRB (v. 9) | Fixed | RHSA-2023:2458 |
| Red Hat Enterprise Linux NFV (v. 8) | Fixed | RHSA-2025:12753 |
| Red Hat Enterprise Linux NFV E4S (v.9.0) | Fixed | RHSA-2025:14094 |
| Red Hat Enterprise Linux RT (v. 8) | Fixed | RHSA-2025:12753 |
| Red Hat Enterprise Linux Real Time E4S (v.9.0) | Fixed | RHSA-2025:14094 |
| Red Hat Enterprise Linux Server (v. 7 ELS) | Fixed | RHSA-2025:14748 |
| Red Hat Enterprise Linux Server Optional (v. 7 ELS) | Fixed | RHSA-2025:14748 |
| Red Hat Enterprise Linux for Real Time (v. 7 ELS) | Fixed | RHSA-2025:14746 |
Not affected: 1 product
- Red Hat Enterprise Linux 10
Timeline
- 2026-10-02 Threatist record created from CVE-2022-50020
- 2026-10-03 Alias added: GHSA-hhx5-crr2-8g8p
- 2026-11-05 CISA SSVC decision points changed
References
Patch 6
- https://git.kernel.org/stable/c/7bdfb01fc5f6b3696728aeb527c50386e0ee09a1
- https://git.kernel.org/stable/c/a6805b3dcf5cd41f2ae3a03dca43411135b99849
- https://git.kernel.org/stable/c/80288883294c5b4ed18bae0d8bd9c4a12f297074
- https://git.kernel.org/stable/c/72b850a2a996f72541172e7cf686d54a2b29bcd8
- https://git.kernel.org/stable/c/0082e99a9074ff88eff729c70c93454c8588d8e1
- https://git.kernel.org/stable/c/69cb8e9d8cd97cdf5e293b26d70a9dee3e35e6bd
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Sources
- CVE-2022-50020 · CVE Program
- CVE-2022-50020 · NVD
- FIRST EPSS
- GHSA-hhx5-crr2-8g8p · GitHub Advisory Database · CC BY 4.0
- CVE-2022-50020 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences