TI-2025-15997 Aliases CVE-2025-22048 GHSA-4vfw-gvwq-xw7v

LoongArch: BPF: Don't override subprog's return value

LOW 33Published 2025-04-16 · Updated 2026-10-30

Key facts

Attack vector: Local
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

In the Linux kernel, the following vulnerability has been resolved: LoongArch: BPF: Don't override subprog's return value The verifier test `calls: div by 0 in subprog` triggers a panic at the ld.bu instruction. The ld.bu insn is trying to load byte from memory address returned by the subprog. The subprog actually set the correct address at the a5 register (dedicated register for BPF return values). But at commit 73c359d1d356 ("LoongArch: BPF: Sign-extend return values") we also sign extended a5 to the a0 register (return value in LoongArch). For function call insn, we later propagate the a0 register back to a5 register. This is right for native calls but wrong for bpf2bpf calls which expect zero-extended return value in a5 register. So only move a0 to a5 for native calls (i.e. non-BPF_PSEUDO_CALL).

Why it matters now

EPSS 0.00215 11th percentileScored 2026-11-07

Fix Fixed Linux (Linux): 6.1.191, 6.6.87, 6.12.23 +4

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Linux	Linux	6.1.120 to before 6.1.191; 6.6.64 to before 6.6.87; 6.12.2 to before 6.12.23; 6.11.11 to before 6.12	6.1.191, 6.6.87, 6.12.23, 6.12	Patch available	CNA
Linux	Linux	6.13 and later	6.1.191, 6.6.87, 6.12.23, 6.13.11, 6.14.2, 6.15	Patch available	CNA

Linux VendorLinux Affected 6.1.120 to before 6.1.191; 6.6.64 to before 6.6.87; 6.12.2 to before 6.12.23; 6.11.11 to before 6.12 Fixed in 6.1.191, 6.6.87, 6.12.23, 6.12 Patch available CNA
Linux VendorLinux Affected 6.13 and later Fixed in 6.1.191, 6.6.87, 6.12.23, 6.13.11, 6.14.2, 6.15 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:o:linux:linux_kernel::::::::	6.1.120 to before 6.2; 6.6.64 to before 6.6.87; 6.11.11 to before 6.12; 6.12.2 to before 6.12.23; 6.13 to before 6.13.11; 6.14 to before 6.14.2	Vulnerable	Linux

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 6.1.120 to before 6.2; 6.6.64 to before 6.6.87; 6.11.11 to before 6.12; 6.12.2 to before 6.12.23; 6.13 to before 6.13.11; 6.14 to before 6.14.2 Vulnerable ·Linux

Remediation

Fix · CNA Linux (Linux) Fixed in 6.1.191, 6.6.87, 6.12.23, 6.12
Fix · CNA Linux (Linux) Fixed in 6.1.191, 6.6.87, 6.12.23, 6.13.11, 6.14.2, 6.15

Vendor assessments

Red Hat

Red Hat rating: Low. Red Hat's page for this CVE →

Not affected: 5 products

Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 9

Timeline

2026-10-02 Threatist record created from CVE-2025-22048
2026-10-03 Alias added: GHSA-4vfw-gvwq-xw7v
2026-10-30 Fix available: Linux/[email protected], Linux/Linux@d99845f672cce0b610f7c51248ef95d7df63927e · CNA
2026-10-30 1 new reference · CNA
2026-11-07 Affected versions changed · Red Hat

References

Patch 5

Other 1

https://git.kernel.org/stable/c/d99845f672cce0b610f7c51248ef95d7df63927e

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Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences