| 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-2023-52448: gfs2: Fix kernel NULL pointer dereference in gfs2_rgrp_dump |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| gfs2: Fix kernel NULL pointer dereference in gfs2_rgrp_dump |
| |
| Syzkaller has reported a NULL pointer dereference when accessing |
| rgd->rd_rgl in gfs2_rgrp_dump(). This can happen when creating |
| rgd->rd_gl fails in read_rindex_entry(). Add a NULL pointer check in |
| gfs2_rgrp_dump() to prevent that. |
| |
| The Linux kernel CVE team has assigned CVE-2023-52448 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.20 with commit 72244b6bc752b5c496f09de9a13c18adc314a53c and fixed in 5.4.268 with commit efc8ef87ab9185a23d5676f2f7d986022d91bcde |
| Issue introduced in 4.20 with commit 72244b6bc752b5c496f09de9a13c18adc314a53c and fixed in 5.10.209 with commit 5c28478af371a1c3fdb570ca67f110e1ae60fc37 |
| Issue introduced in 4.20 with commit 72244b6bc752b5c496f09de9a13c18adc314a53c and fixed in 5.15.148 with commit ee0586d73cbaf0e7058bc640d62a9daf2dfa9178 |
| Issue introduced in 4.20 with commit 72244b6bc752b5c496f09de9a13c18adc314a53c and fixed in 6.1.75 with commit d69d7804cf9e2ba171a27e5f98bc266f13d0414a |
| Issue introduced in 4.20 with commit 72244b6bc752b5c496f09de9a13c18adc314a53c and fixed in 6.6.14 with commit 067a7c48c2c70f05f9460d6f0e8423e234729f05 |
| Issue introduced in 4.20 with commit 72244b6bc752b5c496f09de9a13c18adc314a53c and fixed in 6.7.2 with commit c323efd620c741168c8e0cc6fc0be04ab57e331a |
| Issue introduced in 4.20 with commit 72244b6bc752b5c496f09de9a13c18adc314a53c and fixed in 6.8 with commit 8877243beafa7c6bfc42022cbfdf9e39b25bd4fa |
| |
| 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-2023-52448 |
| 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/gfs2/rgrp.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/efc8ef87ab9185a23d5676f2f7d986022d91bcde |
| https://git.kernel.org/stable/c/5c28478af371a1c3fdb570ca67f110e1ae60fc37 |
| https://git.kernel.org/stable/c/ee0586d73cbaf0e7058bc640d62a9daf2dfa9178 |
| https://git.kernel.org/stable/c/d69d7804cf9e2ba171a27e5f98bc266f13d0414a |
| https://git.kernel.org/stable/c/067a7c48c2c70f05f9460d6f0e8423e234729f05 |
| https://git.kernel.org/stable/c/c323efd620c741168c8e0cc6fc0be04ab57e331a |
| https://git.kernel.org/stable/c/8877243beafa7c6bfc42022cbfdf9e39b25bd4fa |
