A flaw was found in the JFS filesystem code in the Linux Kernel which allows a local attacker with the ability to set extended attributes to panic the system, causing memory corruption or escalating privileges. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.
An official patch is available. Apply the patch as soon as possible.
CVSS v4.0 Metrics
Exploitability
Attack VectorLocal
ComplexityLow
RequirementsPresent
PrivilegesLow
User InteractionNone
Threat
Exploit MaturityPoC
Vulnerable System
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
Subsequent System
ConfidentialityNone
IntegrityNone
AvailabilityNone
Supplemental
SafetyNegligible
AutomatableYes
RecoveryAutomatic
Value DensityConcentrated
UrgencyMedium
Patch StatusOfficial Patch
Change Log
| Date | Source | Changes | Score |
|---|
| 2026-07-21 | PoC | E: U→P | 4.4 → 6.4 |
| 2026-07-21 | nvd | AV: P→L, AC: H→L, PR: H→L, UI: A→N, VC: N→H, VI: N→H, VA: N→H | 0.0 → 4.4 |
| 2026-07-21 | nvd | patch: Unavailable→Official Patch | 0.0 → 0.0 |
| 2026-07-21 | cve.org | initial, patch: Unavailable | 0.0 |
Affected Software
| Vendor | Product | Version |
|---|
| debian | debian_linux | 10.0 |
| debian | debian_linux | 9.0 |
| linux | linux_kernel | ≥ 4.5, < 4.9.249 |
| linux | linux_kernel | ≥ 4.10, < 4.14.213 |
| linux | linux_kernel | ≥ 4.15, < 4.19.164 |
| linux | linux_kernel | ≥ 4.20, < 5.4.86 |
| linux | linux_kernel | ≥ 5.5, < 5.10.4 |
| linux | linux_kernel | > 4.4.249 |
| n/a | Linux Kernel | 5.9.6 |
| netapp | aff_a250_firmware | All versions |
| netapp | fas500f_firmware | All versions |
| netapp | h300e_firmware | All versions |
| netapp | h300s_firmware | All versions |
| netapp | h410c_firmware | All versions |
| netapp | h410s_firmware | All versions |
| netapp | h500e_firmware | All versions |
| netapp | h500s_firmware | All versions |
| netapp | h700e_firmware | All versions |
| netapp | h700s_firmware | All versions |
Published: 2021-05-26
