EUVD-2026-76520
GHSA-m87w-w8mv-rf6c
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Local access with low privileges needed to open an eCryptfs file; OOB read yields kernel memory disclosure and crash potential but no write corruption.
Primary rating from Vendor (Linux).
CVSS VectorVendor: Linux
Lifecycle Timeline
6DescriptionCVE.org
In the Linux kernel, the following vulnerability has been resolved:
ecryptfs: pass packet set buffer size to parser
ecryptfs_parse_packet_set() receives a pointer into the file header, but it calculates the remaining packet buffer size from PAGE_SIZE - 8. For version 1 headers the packet set starts later in the header, so this can overstate the available buffer.
Pass the actual packet set buffer length from the caller and calculate per-packet limits from the remaining bytes in that buffer. Recompute the remaining length after consuming a tag 3 packet before parsing the following tag 11 packet.
AnalysisAI
Out-of-bounds read in the Linux kernel's eCryptfs filesystem packet parser allows a local low-privileged attacker to leak kernel memory or trigger a denial of service by opening a crafted encrypted file with a version 1 header. The root cause is that ecryptfs_parse_packet_set() computes remaining buffer space using a fixed PAGE_SIZE - 8 formula instead of the actual packet-set buffer length, overstating available bytes for version 1 headers where the packet set begins later. …
Unlock full vulnerability intelligence
- Risk assessment & exploitation conditions
- Attack chain visualization
- Remediation with exact patch versions
- Threat intelligence from 22 sources
- Personal watchlist & email alerts
Free forever · No credit card required
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires: (1) eCryptfs filesystem actively configured and mounted on the target system - this is a non-default configuration absent from most modern Linux deployments; (2) the encrypted filesystem uses version 1 file headers, which affects how the packet-set offset is calculated; (3) the attacker holds a local user account with at least read access to the eCryptfs-mounted path (PR:L). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | Real-world risk is moderate-low despite the 7.1 CVSS score. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Apply the vendor-released kernel patch corresponding to your stable branch: upgrade to Linux 6.12.109, 6.18.50, 7.2.4, or 7.3-rc1 (or later). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory Linux systems using eCryptfs and identify which are running vulnerable kernel versions (6.12.x, 6.18.x, 7.2.x pre-release). …
Sign in for detailed remediation steps and compensating controls.
Threat intelligence, references, and detailed analysis are available after sign-in.
Same technique Denial Of Service
View allShare
External POC / Exploit Code
Leaving vuln.today