| 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-2024-35878: of: module: prevent NULL pointer dereference in vsnprintf() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| of: module: prevent NULL pointer dereference in vsnprintf() |
| |
| In of_modalias(), we can get passed the str and len parameters which would |
| cause a kernel oops in vsnprintf() since it only allows passing a NULL ptr |
| when the length is also 0. Also, we need to filter out the negative values |
| of the len parameter as these will result in a really huge buffer since |
| snprintf() takes size_t parameter while ours is ssize_t... |
| |
| Found by Linux Verification Center (linuxtesting.org) with the Svace static |
| analysis tool. |
| |
| The Linux kernel CVE team has assigned CVE-2024-35878 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 6.6.26 with commit e4a449368a2ce6d57a775d0ead27fc07f5a86e5b |
| Fixed in 6.8.5 with commit 544561dc56f7e69a053c25e11e6170f48bb97898 |
| Fixed in 6.9 with commit a1aa5390cc912934fee76ce80af5f940452fa987 |
| |
| 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-2024-35878 |
| 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/of/module.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/e4a449368a2ce6d57a775d0ead27fc07f5a86e5b |
| https://git.kernel.org/stable/c/544561dc56f7e69a053c25e11e6170f48bb97898 |
| https://git.kernel.org/stable/c/a1aa5390cc912934fee76ce80af5f940452fa987 |
