CVE-2026-72426
- Source
- https://cve.org/CVERecord?id=CVE-2026-72426
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72426.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-72426
- Downstream
- Published
- 2026-08-15T05:56:43Z
- Modified
- 2026-08-18T03:56:55Z
- Severity
-
- 8.4 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- bpf: Preserve pointer spill metadata during half-slot cleanup
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
bpf: Preserve pointer spill metadata during half-slot cleanup
__clean_func_state() cleans dead stack slots in 4-byte halves. When the high half of a STACK_SPILL slot is dead and the low half remains live, cleanup converts the live low half to STACK_MISC or STACK_ZERO and clears the saved spilled_ptr metadata.
That conversion is safe only for scalar spills. For a pointer spill, this metadata clear lets a later 32-bit fill from the still-live half avoid the normal non-scalar register-fill check and be treated as an ordinary scalar stack read.
Leave non-scalar spill slots intact in this half-live shape. This is conservative for pruning and preserves the existing check_stack_read_fixed_off() rejection path for partial fills from pointer spills.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72426.json" }- References
-
- https://git.kernel.org/stable/c/0f9278b22cda6fd2525049930157b79b4036b4ef
- https://git.kernel.org/stable/c/3a354149bceacadbcf7d7b4766f5ef26a85892ab
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72426.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-72426
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git