| From bippy-5f407fcff5a0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2025-21728: bpf: Send signals asynchronously if !preemptible |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| bpf: Send signals asynchronously if !preemptible |
| |
| BPF programs can execute in all kinds of contexts and when a program |
| running in a non-preemptible context uses the bpf_send_signal() kfunc, |
| it will cause issues because this kfunc can sleep. |
| Change `irqs_disabled()` to `!preemptible()`. |
| |
| The Linux kernel CVE team has assigned CVE-2025-21728 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.4.33 with commit fd29a0242f86b2d95ad666aa9f92a3d0f7bfdab6 and fixed in 5.4.291 with commit feba1308bc5e8e04cee751d39fae8a9b407a9034 |
| Issue introduced in 5.6 with commit 1bc7896e9ef44fd77858b3ef0b8a6840be3a4494 and fixed in 5.10.235 with commit ce51eab2070e295d298f42a2f1db269cd1b56d55 |
| Issue introduced in 5.6 with commit 1bc7896e9ef44fd77858b3ef0b8a6840be3a4494 and fixed in 5.15.179 with commit e306eaaa3d78b462db5f5b11e0171f9d2b6ca3f4 |
| Issue introduced in 5.6 with commit 1bc7896e9ef44fd77858b3ef0b8a6840be3a4494 and fixed in 6.1.129 with commit be42a09fe898635b0093c0c8dac1bfabe225c240 |
| Issue introduced in 5.6 with commit 1bc7896e9ef44fd77858b3ef0b8a6840be3a4494 and fixed in 6.6.76 with commit eeef8e65041a031bd8a747a392c14b76a123a12c |
| Issue introduced in 5.6 with commit 1bc7896e9ef44fd77858b3ef0b8a6840be3a4494 and fixed in 6.12.13 with commit 78b97783496b454435639937db3303e900a24d3f |
| Issue introduced in 5.6 with commit 1bc7896e9ef44fd77858b3ef0b8a6840be3a4494 and fixed in 6.13.2 with commit 092fc76b7ab4163e008f9cde596a58dad2108260 |
| Issue introduced in 5.6 with commit 1bc7896e9ef44fd77858b3ef0b8a6840be3a4494 and fixed in 6.14 with commit 87c544108b612512b254c8f79aa5c0a8546e2cc4 |
| Issue introduced in 5.5.18 with commit 7930d01afb7281edd9782971e0cca6fe587c7a7b |
| |
| 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-2025-21728 |
| 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: |
| kernel/trace/bpf_trace.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/feba1308bc5e8e04cee751d39fae8a9b407a9034 |
| https://git.kernel.org/stable/c/ce51eab2070e295d298f42a2f1db269cd1b56d55 |
| https://git.kernel.org/stable/c/e306eaaa3d78b462db5f5b11e0171f9d2b6ca3f4 |
| https://git.kernel.org/stable/c/be42a09fe898635b0093c0c8dac1bfabe225c240 |
| https://git.kernel.org/stable/c/eeef8e65041a031bd8a747a392c14b76a123a12c |
| https://git.kernel.org/stable/c/78b97783496b454435639937db3303e900a24d3f |
| https://git.kernel.org/stable/c/092fc76b7ab4163e008f9cde596a58dad2108260 |
| https://git.kernel.org/stable/c/87c544108b612512b254c8f79aa5c0a8546e2cc4 |
