| From bippy-1.2.0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@kernel.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2025-37963: arm64: bpf: Only mitigate cBPF programs loaded by unprivileged users |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| arm64: bpf: Only mitigate cBPF programs loaded by unprivileged users |
| |
| Support for eBPF programs loaded by unprivileged users is typically |
| disabled. This means only cBPF programs need to be mitigated for BHB. |
| |
| In addition, only mitigate cBPF programs that were loaded by an |
| unprivileged user. Privileged users can also load the same program |
| via eBPF, making the mitigation pointless. |
| |
| The Linux kernel CVE team has assigned CVE-2025-37963 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 6.1.139 with commit 6e52d043f7dbf1839a24a3fab2b12b0d3839de7a |
| Fixed in 6.6.91 with commit 80251f62028f1ab2e09be5ca3123f84e8b00389a |
| Fixed in 6.12.29 with commit e5f5100f1c64ac6c72671b2cf6b46542fce93706 |
| Fixed in 6.14.7 with commit 477481c4348268136227348984b6699d6370b685 |
| Fixed in 6.15 with commit f300769ead032513a68e4a02e806393402e626f8 |
| |
| Please see https://www.kernel.org for a full list of currently supported |
| kernel versions by the kernel community. |
| |
| Unaffected versions might change over time as fixes are backported to |
| older supported kernel versions. The official CVE entry at |
| https://cve.org/CVERecord/?id=CVE-2025-37963 |
| will be updated if fixes are backported, please check that for the most |
| up to date information about this issue. |
| |
| |
| Affected files |
| ============== |
| |
| The file(s) affected by this issue are: |
| arch/arm64/net/bpf_jit_comp.c |
| |
| |
| Mitigation |
| ========== |
| |
| The Linux kernel CVE team recommends that you update to the latest |
| stable kernel version for this, and many other bugfixes. Individual |
| changes are never tested alone, but rather are part of a larger kernel |
| release. Cherry-picking individual commits is not recommended or |
| supported by the Linux kernel community at all. If however, updating to |
| the latest release is impossible, the individual changes to resolve this |
| issue can be found at these commits: |
| https://git.kernel.org/stable/c/6e52d043f7dbf1839a24a3fab2b12b0d3839de7a |
| https://git.kernel.org/stable/c/80251f62028f1ab2e09be5ca3123f84e8b00389a |
| https://git.kernel.org/stable/c/e5f5100f1c64ac6c72671b2cf6b46542fce93706 |
| https://git.kernel.org/stable/c/477481c4348268136227348984b6699d6370b685 |
| https://git.kernel.org/stable/c/f300769ead032513a68e4a02e806393402e626f8 |
