| 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-2021-47260: NFS: Fix a potential NULL dereference in nfs_get_client() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| NFS: Fix a potential NULL dereference in nfs_get_client() |
| |
| None of the callers are expecting NULL returns from nfs_get_client() so |
| this code will lead to an Oops. It's better to return an error |
| pointer. I expect that this is dead code so hopefully no one is |
| affected. |
| |
| The Linux kernel CVE team has assigned CVE-2021-47260 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 3.17 with commit 31434f496abb9f3410b10f541462fe58613dd3ad and fixed in 4.4.273 with commit fab8bfdfb4aac9e4e8363666333adfdf21e89106 |
| Issue introduced in 3.17 with commit 31434f496abb9f3410b10f541462fe58613dd3ad and fixed in 4.9.273 with commit a979e601000982a3ca693171a6d4dffc47f8ad00 |
| Issue introduced in 3.17 with commit 31434f496abb9f3410b10f541462fe58613dd3ad and fixed in 4.14.237 with commit 634f17ff1d59905eb3b4bbbc00805961d08beaee |
| Issue introduced in 3.17 with commit 31434f496abb9f3410b10f541462fe58613dd3ad and fixed in 4.19.195 with commit 4b380a7d84ef2ce3f4f5bec5d8706ed937ac6502 |
| Issue introduced in 3.17 with commit 31434f496abb9f3410b10f541462fe58613dd3ad and fixed in 5.4.126 with commit 0057ecef9f324007c0ba5fcca4ddd131178ce78b |
| Issue introduced in 3.17 with commit 31434f496abb9f3410b10f541462fe58613dd3ad and fixed in 5.10.44 with commit 279ad78a00f8b9c5ff24171a59297187a3bd44b7 |
| Issue introduced in 3.17 with commit 31434f496abb9f3410b10f541462fe58613dd3ad and fixed in 5.12.11 with commit 58ddf61f10b8f9b7b1341644bfee2f1c6508d4e1 |
| Issue introduced in 3.17 with commit 31434f496abb9f3410b10f541462fe58613dd3ad and fixed in 5.13 with commit 09226e8303beeec10f2ff844d2e46d1371dc58e0 |
| |
| 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-2021-47260 |
| 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: |
| fs/nfs/client.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/fab8bfdfb4aac9e4e8363666333adfdf21e89106 |
| https://git.kernel.org/stable/c/a979e601000982a3ca693171a6d4dffc47f8ad00 |
| https://git.kernel.org/stable/c/634f17ff1d59905eb3b4bbbc00805961d08beaee |
| https://git.kernel.org/stable/c/4b380a7d84ef2ce3f4f5bec5d8706ed937ac6502 |
| https://git.kernel.org/stable/c/0057ecef9f324007c0ba5fcca4ddd131178ce78b |
| https://git.kernel.org/stable/c/279ad78a00f8b9c5ff24171a59297187a3bd44b7 |
| https://git.kernel.org/stable/c/58ddf61f10b8f9b7b1341644bfee2f1c6508d4e1 |
| https://git.kernel.org/stable/c/09226e8303beeec10f2ff844d2e46d1371dc58e0 |
