| 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-2023-52566: nilfs2: fix potential use after free in nilfs_gccache_submit_read_data() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| nilfs2: fix potential use after free in nilfs_gccache_submit_read_data() |
| |
| In nilfs_gccache_submit_read_data(), brelse(bh) is called to drop the |
| reference count of bh when the call to nilfs_dat_translate() fails. If |
| the reference count hits 0 and its owner page gets unlocked, bh may be |
| freed. However, bh->b_page is dereferenced to put the page after that, |
| which may result in a use-after-free bug. This patch moves the release |
| operation after unlocking and putting the page. |
| |
| NOTE: The function in question is only called in GC, and in combination |
| with current userland tools, address translation using DAT does not occur |
| in that function, so the code path that causes this issue will not be |
| executed. However, it is possible to run that code path by intentionally |
| modifying the userland GC library or by calling the GC ioctl directly. |
| |
| [konishi.ryusuke@gmail.com: NOTE added to the commit log] |
| |
| The Linux kernel CVE team has assigned CVE-2023-52566 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 2.6.30 with commit a3d93f709e893187d301aa5458b2248db9f22bd1 and fixed in 4.14.327 with commit fb1084e63ee56958b0a56e17a50a4fd86445b9c1 |
| Issue introduced in 2.6.30 with commit a3d93f709e893187d301aa5458b2248db9f22bd1 and fixed in 4.19.296 with commit bb61224f6abc8e71bfdf06d7c984e23460875f5b |
| Issue introduced in 2.6.30 with commit a3d93f709e893187d301aa5458b2248db9f22bd1 and fixed in 5.4.258 with commit 193b5a1c6c67c36b430989dc063fe7ea4e200a33 |
| Issue introduced in 2.6.30 with commit a3d93f709e893187d301aa5458b2248db9f22bd1 and fixed in 5.10.198 with commit 7130a87ca32396eb9bf48b71a2d42259ae44c6c7 |
| Issue introduced in 2.6.30 with commit a3d93f709e893187d301aa5458b2248db9f22bd1 and fixed in 5.15.134 with commit 3936e8714907cd55e37c7cc50e50229e4a9042e8 |
| Issue introduced in 2.6.30 with commit a3d93f709e893187d301aa5458b2248db9f22bd1 and fixed in 6.1.56 with commit 980663f1d189eedafd18d80053d9cf3e2ceb5c8c |
| Issue introduced in 2.6.30 with commit a3d93f709e893187d301aa5458b2248db9f22bd1 and fixed in 6.5.6 with commit 28df4646ad8b433340772edc90ca709cdefc53e2 |
| Issue introduced in 2.6.30 with commit a3d93f709e893187d301aa5458b2248db9f22bd1 and fixed in 6.6 with commit 7ee29facd8a9c5a26079148e36bcf07141b3a6bc |
| |
| 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-2023-52566 |
| 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/nilfs2/gcinode.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/fb1084e63ee56958b0a56e17a50a4fd86445b9c1 |
| https://git.kernel.org/stable/c/bb61224f6abc8e71bfdf06d7c984e23460875f5b |
| https://git.kernel.org/stable/c/193b5a1c6c67c36b430989dc063fe7ea4e200a33 |
| https://git.kernel.org/stable/c/7130a87ca32396eb9bf48b71a2d42259ae44c6c7 |
| https://git.kernel.org/stable/c/3936e8714907cd55e37c7cc50e50229e4a9042e8 |
| https://git.kernel.org/stable/c/980663f1d189eedafd18d80053d9cf3e2ceb5c8c |
| https://git.kernel.org/stable/c/28df4646ad8b433340772edc90ca709cdefc53e2 |
| https://git.kernel.org/stable/c/7ee29facd8a9c5a26079148e36bcf07141b3a6bc |
