| From bippy-1.1.0 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-2022-49821: mISDN: fix possible memory leak in mISDN_dsp_element_register() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| mISDN: fix possible memory leak in mISDN_dsp_element_register() |
| |
| Afer commit 1fa5ae857bb1 ("driver core: get rid of struct device's |
| bus_id string array"), the name of device is allocated dynamically, |
| use put_device() to give up the reference, so that the name can be |
| freed in kobject_cleanup() when the refcount is 0. |
| |
| The 'entry' is going to be freed in mISDN_dsp_dev_release(), so the |
| kfree() is removed. list_del() is called in mISDN_dsp_dev_release(), |
| so it need be initialized. |
| |
| The Linux kernel CVE team has assigned CVE-2022-49821 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 2.6.30 with commit 1fa5ae857bb14f6046205171d98506d8112dd74e and fixed in 4.9.334 with commit bbd53d05c4c892080ef3b617eff4f57903acecb9 |
| Issue introduced in 2.6.30 with commit 1fa5ae857bb14f6046205171d98506d8112dd74e and fixed in 4.14.300 with commit b119bedbefb7dd9ed8bf8cb9f1056504250d610e |
| Issue introduced in 2.6.30 with commit 1fa5ae857bb14f6046205171d98506d8112dd74e and fixed in 4.19.267 with commit 727ed7d28348c026c7ef4d852f3d0e5054d376e8 |
| Issue introduced in 2.6.30 with commit 1fa5ae857bb14f6046205171d98506d8112dd74e and fixed in 5.4.225 with commit 0f2c681900a01e3f23789bca26d88268c3d5b51d |
| Issue introduced in 2.6.30 with commit 1fa5ae857bb14f6046205171d98506d8112dd74e and fixed in 5.10.156 with commit 083a2c9ef82e184bdf0b9f9a1e5fc38d32afbb47 |
| Issue introduced in 2.6.30 with commit 1fa5ae857bb14f6046205171d98506d8112dd74e and fixed in 5.15.80 with commit 7a05e3929668c8cfef495c69752a9e91fac4878f |
| Issue introduced in 2.6.30 with commit 1fa5ae857bb14f6046205171d98506d8112dd74e and fixed in 6.0.10 with commit d4b8394725079670be309f9a35ad88a8cbbaaefd |
| Issue introduced in 2.6.30 with commit 1fa5ae857bb14f6046205171d98506d8112dd74e and fixed in 6.1 with commit 98a2ac1ca8fd6eca6867726fe238d06e75eb1acd |
| |
| 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-2022-49821 |
| 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/isdn/mISDN/dsp_pipeline.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/bbd53d05c4c892080ef3b617eff4f57903acecb9 |
| https://git.kernel.org/stable/c/b119bedbefb7dd9ed8bf8cb9f1056504250d610e |
| https://git.kernel.org/stable/c/727ed7d28348c026c7ef4d852f3d0e5054d376e8 |
| https://git.kernel.org/stable/c/0f2c681900a01e3f23789bca26d88268c3d5b51d |
| https://git.kernel.org/stable/c/083a2c9ef82e184bdf0b9f9a1e5fc38d32afbb47 |
| https://git.kernel.org/stable/c/7a05e3929668c8cfef495c69752a9e91fac4878f |
| https://git.kernel.org/stable/c/d4b8394725079670be309f9a35ad88a8cbbaaefd |
| https://git.kernel.org/stable/c/98a2ac1ca8fd6eca6867726fe238d06e75eb1acd |
