| 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-2025-37820: xen-netfront: handle NULL returned by xdp_convert_buff_to_frame() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| xen-netfront: handle NULL returned by xdp_convert_buff_to_frame() |
| |
| The function xdp_convert_buff_to_frame() may return NULL if it fails |
| to correctly convert the XDP buffer into an XDP frame due to memory |
| constraints, internal errors, or invalid data. Failing to check for NULL |
| may lead to a NULL pointer dereference if the result is used later in |
| processing, potentially causing crashes, data corruption, or undefined |
| behavior. |
| |
| On XDP redirect failure, the associated page must be released explicitly |
| if it was previously retained via get_page(). Failing to do so may result |
| in a memory leak, as the pages reference count is not decremented. |
| |
| The Linux kernel CVE team has assigned CVE-2025-37820 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.9 with commit 6c5aa6fc4defc2a0977a2c59e4710d50fa1e834c and fixed in 6.1.136 with commit 5b83d30c63f9964acb1bc63eb8e670b9e0d2c240 |
| Issue introduced in 5.9 with commit 6c5aa6fc4defc2a0977a2c59e4710d50fa1e834c and fixed in 6.6.89 with commit cefd8a2e2de46209ce66e6d30c237eb59b6c5bfa |
| Issue introduced in 5.9 with commit 6c5aa6fc4defc2a0977a2c59e4710d50fa1e834c and fixed in 6.12.26 with commit d6a9c4e6f9b3ec3ad98468c950ad214af8a2efb9 |
| Issue introduced in 5.9 with commit 6c5aa6fc4defc2a0977a2c59e4710d50fa1e834c and fixed in 6.14.5 with commit eefccd889df3b49d92e7349d94c4aa7e1ba19f6c |
| Issue introduced in 5.9 with commit 6c5aa6fc4defc2a0977a2c59e4710d50fa1e834c and fixed in 6.15 with commit cc3628dcd851ddd8d418bf0c897024b4621ddc92 |
| |
| 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-2025-37820 |
| 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: |
| drivers/net/xen-netfront.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/5b83d30c63f9964acb1bc63eb8e670b9e0d2c240 |
| https://git.kernel.org/stable/c/cefd8a2e2de46209ce66e6d30c237eb59b6c5bfa |
| https://git.kernel.org/stable/c/d6a9c4e6f9b3ec3ad98468c950ad214af8a2efb9 |
| https://git.kernel.org/stable/c/eefccd889df3b49d92e7349d94c4aa7e1ba19f6c |
| https://git.kernel.org/stable/c/cc3628dcd851ddd8d418bf0c897024b4621ddc92 |
