In the Linux kernel, the following vulnerability has been resolved: afs: fix NULL pointer dereference in afs_get_tree() afs_alloc_sbi() uses kzalloc… (CVE-2026-74426)
A NULL pointer dereference vulnerability in the Linux kernel's AFS filesystem code was identified and resolved. The issue occurs in the afs_get_tree() function when afs_alloc_sbi() allocates memory but certain pointers (as->cell and as->volume) remain null and are subsequently dereferenced. This leads to a kernel crash detected by KASAN. The vulnerability was found by the Linux Verification Center using Syzkaller and has been fixed in the kernel.
AI Analysis
Technical Summary
The vulnerability involves a NULL pointer dereference in the afs_get_tree() function of the Linux kernel's AFS filesystem implementation. Specifically, afs_alloc_sbi() uses kzalloc for memory allocation, but if ctx->dyn_root is not null, the pointers as->cell and as->volume remain null. These null pointers are dereferenced in trace_afs_get_tree(), causing a kernel crash. The issue was detected by KASAN and traced through kernel functions related to mounting. This vulnerability has been resolved in the Linux kernel.
Potential Impact
Exploitation of this vulnerability can cause a kernel NULL pointer dereference leading to a denial of service (system crash). There is no indication of privilege escalation or code execution. No known exploits are reported in the wild.
Mitigation Recommendations
A fix for this vulnerability has been applied in the Linux kernel. Users should update to the latest kernel version containing this patch. Since this is a kernel-level issue, applying the official kernel update is the recommended remediation. No additional mitigations are indicated.
In the Linux kernel, the following vulnerability has been resolved: afs: fix NULL pointer dereference in afs_get_tree() afs_alloc_sbi() uses kzalloc… (CVE-2026-74426)
Description
A NULL pointer dereference vulnerability in the Linux kernel's AFS filesystem code was identified and resolved. The issue occurs in the afs_get_tree() function when afs_alloc_sbi() allocates memory but certain pointers (as->cell and as->volume) remain null and are subsequently dereferenced. This leads to a kernel crash detected by KASAN. The vulnerability was found by the Linux Verification Center using Syzkaller and has been fixed in the kernel.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability involves a NULL pointer dereference in the afs_get_tree() function of the Linux kernel's AFS filesystem implementation. Specifically, afs_alloc_sbi() uses kzalloc for memory allocation, but if ctx->dyn_root is not null, the pointers as->cell and as->volume remain null. These null pointers are dereferenced in trace_afs_get_tree(), causing a kernel crash. The issue was detected by KASAN and traced through kernel functions related to mounting. This vulnerability has been resolved in the Linux kernel.
Potential Impact
Exploitation of this vulnerability can cause a kernel NULL pointer dereference leading to a denial of service (system crash). There is no indication of privilege escalation or code execution. No known exploits are reported in the wild.
Mitigation Recommendations
A fix for this vulnerability has been applied in the Linux kernel. Users should update to the latest kernel version containing this patch. Since this is a kernel-level issue, applying the official kernel update is the recommended remediation. No additional mitigations are indicated.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-8xv3-wjfw-qm6v
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-74426"]
- Ecosystems
- []
- Database Specific Severity
- null
- Cvss Version
- null
Threat ID: 6a808b68bf8831d5394f53c4
Added to database: 08/15/2026, 15:53:12 UTC
Last enriched: 08/15/2026, 15:58:42 UTC
Last updated: 08/15/2026, 15:59:56 UTC
Views: 2
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