In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to do sanity check on f2fs_get_node_folio_ra() kernel BUG at… (CVE-2026-63819)
A vulnerability in the Linux kernel's f2fs filesystem code was resolved by adding a sanity check in the f2fs_get_node_folio_ra() function to prevent a kernel BUG triggered by corrupted inode data. The issue could cause a system panic due to an invalid node chain in the inode mapping table. The fix introduces a new node type to detect inconsistent node chains and prevent the kernel crash.
AI Analysis
Technical Summary
The vulnerability in the Linux kernel's f2fs filesystem arises from missing sanity checks in the f2fs_get_node_folio_ra() function, which can lead to a kernel BUG triggered by corrupted inode data containing a direct node with conflicting inode and node IDs. This causes the function f2fs_do_truncate_blocks() to calculate an invalid address range, resulting in a system panic (kernel BUG). The patch adds a NODE_TYPE_NON_IXNODE to detect and reject inconsistent node chains in the inode mapping table, preventing the panic.
Potential Impact
Exploitation of this vulnerability can cause a kernel panic leading to a denial of service (system crash). There is no information about privilege escalation or data corruption beyond the kernel crash. No known exploits are reported in the wild.
Mitigation Recommendations
A fix for this vulnerability has been implemented in the Linux kernel by adding sanity checks in the f2fs filesystem code. Users should apply the official kernel updates that include this patch once available. Patch status is not yet confirmed in the provided data; check the vendor advisory for current remediation guidance.
In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to do sanity check on f2fs_get_node_folio_ra() kernel BUG at… (CVE-2026-63819)
Description
A vulnerability in the Linux kernel's f2fs filesystem code was resolved by adding a sanity check in the f2fs_get_node_folio_ra() function to prevent a kernel BUG triggered by corrupted inode data. The issue could cause a system panic due to an invalid node chain in the inode mapping table. The fix introduces a new node type to detect inconsistent node chains and prevent the kernel crash.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in the Linux kernel's f2fs filesystem arises from missing sanity checks in the f2fs_get_node_folio_ra() function, which can lead to a kernel BUG triggered by corrupted inode data containing a direct node with conflicting inode and node IDs. This causes the function f2fs_do_truncate_blocks() to calculate an invalid address range, resulting in a system panic (kernel BUG). The patch adds a NODE_TYPE_NON_IXNODE to detect and reject inconsistent node chains in the inode mapping table, preventing the panic.
Potential Impact
Exploitation of this vulnerability can cause a kernel panic leading to a denial of service (system crash). There is no information about privilege escalation or data corruption beyond the kernel crash. No known exploits are reported in the wild.
Mitigation Recommendations
A fix for this vulnerability has been implemented in the Linux kernel by adding sanity checks in the f2fs filesystem code. Users should apply the official kernel updates that include this patch once available. Patch status is not yet confirmed in the provided data; check the vendor advisory for current remediation guidance.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-x28c-5hrw-xmh5
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-63819"]
- Ecosystems
- []
- Database Specific Severity
- null
- Cvss Version
- null
Threat ID: 6a5d27ac2a4a8d5989130fc4
Added to database: 07/19/2026, 19:38:20 UTC
Last enriched: 07/19/2026, 20:17:41 UTC
Last updated: 07/20/2026, 17:26:47 UTC
Views: 10
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.