| 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-2024-26945: crypto: iaa - Fix nr_cpus < nr_iaa case |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| crypto: iaa - Fix nr_cpus < nr_iaa case |
| |
| If nr_cpus < nr_iaa, the calculated cpus_per_iaa will be 0, which |
| causes a divide-by-0 in rebalance_wq_table(). |
| |
| Make sure cpus_per_iaa is 1 in that case, and also in the nr_iaa == 0 |
| case, even though cpus_per_iaa is never used if nr_iaa == 0, for |
| paranoia. |
| |
| The Linux kernel CVE team has assigned CVE-2024-26945 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.8 with commit ea7a5cbb43696cfacf73e61916d1860ac30b5b2f and fixed in 6.8.3 with commit a5ca1be7f9817de4e93085778b3ee2219bdc2664 |
| Issue introduced in 6.8 with commit ea7a5cbb43696cfacf73e61916d1860ac30b5b2f and fixed in 6.9 with commit 5a7e89d3315d1be86aff8a8bf849023cda6547f7 |
| |
| 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-2024-26945 |
| 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/crypto/intel/iaa/iaa_crypto_main.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/a5ca1be7f9817de4e93085778b3ee2219bdc2664 |
| https://git.kernel.org/stable/c/5a7e89d3315d1be86aff8a8bf849023cda6547f7 |
