| 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-2022-48703: thermal/int340x_thermal: handle data_vault when the value is ZERO_SIZE_PTR |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| thermal/int340x_thermal: handle data_vault when the value is ZERO_SIZE_PTR |
| |
| In some case, the GDDV returns a package with a buffer which has |
| zero length. It causes that kmemdup() returns ZERO_SIZE_PTR (0x10). |
| |
| Then the data_vault_read() got NULL point dereference problem when |
| accessing the 0x10 value in data_vault. |
| |
| [ 71.024560] BUG: kernel NULL pointer dereference, address: |
| 0000000000000010 |
| |
| This patch uses ZERO_OR_NULL_PTR() for checking ZERO_SIZE_PTR or |
| NULL value in data_vault. |
| |
| The Linux kernel CVE team has assigned CVE-2022-48703 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.8 with commit 0ba13c763aacb27ab32bde5d559bf40e88465921 and fixed in 5.19.9 with commit dae42083b045a4ddf71c57cf350cb2412b5915c2 |
| Issue introduced in 5.8 with commit 0ba13c763aacb27ab32bde5d559bf40e88465921 and fixed in 6.0 with commit 7931e28098a4c1a2a6802510b0cbe57546d2049d |
| |
| 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-2022-48703 |
| 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/thermal/intel/int340x_thermal/int3400_thermal.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/dae42083b045a4ddf71c57cf350cb2412b5915c2 |
| https://git.kernel.org/stable/c/7931e28098a4c1a2a6802510b0cbe57546d2049d |
