| 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-2025-21793: spi: sn-f-ospi: Fix division by zero |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| spi: sn-f-ospi: Fix division by zero |
| |
| When there is no dummy cycle in the spi-nor commands, both dummy bus cycle |
| bytes and width are zero. Because of the cpu's warning when divided by |
| zero, the warning should be avoided. Return just zero to avoid such |
| calculations. |
| |
| The Linux kernel CVE team has assigned CVE-2025-21793 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.2 with commit 1b74dd64c8612619e399e5a31da79a3636914495 and fixed in 6.6.79 with commit 966328191b4c389c0f2159fa242915f51cbc1679 |
| Issue introduced in 6.2 with commit 1b74dd64c8612619e399e5a31da79a3636914495 and fixed in 6.12.16 with commit 4df6f005bef04a3dd16c028124a1b5684db3922b |
| Issue introduced in 6.2 with commit 1b74dd64c8612619e399e5a31da79a3636914495 and fixed in 6.13.4 with commit 7434135553bc03809a55803ee6a8dcaae6240d55 |
| Issue introduced in 6.2 with commit 1b74dd64c8612619e399e5a31da79a3636914495 and fixed in 6.14 with commit 3588b1c0fde2f58d166e3f94a5a58d64b893526c |
| |
| 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-2025-21793 |
| 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/spi/spi-sn-f-ospi.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/966328191b4c389c0f2159fa242915f51cbc1679 |
| https://git.kernel.org/stable/c/4df6f005bef04a3dd16c028124a1b5684db3922b |
| https://git.kernel.org/stable/c/7434135553bc03809a55803ee6a8dcaae6240d55 |
| https://git.kernel.org/stable/c/3588b1c0fde2f58d166e3f94a5a58d64b893526c |
