| 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-2021-47466: mm, slub: fix potential memoryleak in kmem_cache_open() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| mm, slub: fix potential memoryleak in kmem_cache_open() |
| |
| In error path, the random_seq of slub cache might be leaked. Fix this |
| by using __kmem_cache_release() to release all the relevant resources. |
| |
| The Linux kernel CVE team has assigned CVE-2021-47466 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.8 with commit 210e7a43fa905bccafa9bb5966fba1d71f33eb8b and fixed in 5.4.156 with commit 4f5d1c29cfab5cb0ab885059818751bdef32e2bb |
| Issue introduced in 4.8 with commit 210e7a43fa905bccafa9bb5966fba1d71f33eb8b and fixed in 5.10.76 with commit 568f906340b43120abd6fcc67c37396482f85930 |
| Issue introduced in 4.8 with commit 210e7a43fa905bccafa9bb5966fba1d71f33eb8b and fixed in 5.14.15 with commit 42b81946e3ac9ea0372ba16e05160dc11e02694f |
| Issue introduced in 4.8 with commit 210e7a43fa905bccafa9bb5966fba1d71f33eb8b and fixed in 5.15 with commit 9037c57681d25e4dcc442d940d6dbe24dd31f461 |
| |
| 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-2021-47466 |
| 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: |
| mm/slub.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/4f5d1c29cfab5cb0ab885059818751bdef32e2bb |
| https://git.kernel.org/stable/c/568f906340b43120abd6fcc67c37396482f85930 |
| https://git.kernel.org/stable/c/42b81946e3ac9ea0372ba16e05160dc11e02694f |
| https://git.kernel.org/stable/c/9037c57681d25e4dcc442d940d6dbe24dd31f461 |
