| From bippy-1.2.0 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-2022-48747: block: Fix wrong offset in bio_truncate() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| block: Fix wrong offset in bio_truncate() |
| |
| bio_truncate() clears the buffer outside of last block of bdev, however |
| current bio_truncate() is using the wrong offset of page. So it can |
| return the uninitialized data. |
| |
| This happened when both of truncated/corrupted FS and userspace (via |
| bdev) are trying to read the last of bdev. |
| |
| The Linux kernel CVE team has assigned CVE-2022-48747 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.4.9 with commit 943cd69efac437d82a7aea0659fccbcc071730de and fixed in 5.4.176 with commit 6cbf4c731d7812518cd857c2cfc3da9fd120f6ae |
| Issue introduced in 5.5 with commit 85a8ce62c2eabe28b9d76ca4eecf37922402df93 and fixed in 5.10.96 with commit b63e120189fd92aff00096d11e2fc5253f60248b |
| Issue introduced in 5.5 with commit 85a8ce62c2eabe28b9d76ca4eecf37922402df93 and fixed in 5.15.19 with commit 4633a79ff8bc82770486a063a08b55e5162521d8 |
| Issue introduced in 5.5 with commit 85a8ce62c2eabe28b9d76ca4eecf37922402df93 and fixed in 5.16.5 with commit 941d5180c430ce5b0f7a3622ef9b76077bfa3d82 |
| Issue introduced in 5.5 with commit 85a8ce62c2eabe28b9d76ca4eecf37922402df93 and fixed in 5.17 with commit 3ee859e384d453d6ac68bfd5971f630d9fa46ad3 |
| |
| 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-2022-48747 |
| 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: |
| block/bio.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/6cbf4c731d7812518cd857c2cfc3da9fd120f6ae |
| https://git.kernel.org/stable/c/b63e120189fd92aff00096d11e2fc5253f60248b |
| https://git.kernel.org/stable/c/4633a79ff8bc82770486a063a08b55e5162521d8 |
| https://git.kernel.org/stable/c/941d5180c430ce5b0f7a3622ef9b76077bfa3d82 |
| https://git.kernel.org/stable/c/3ee859e384d453d6ac68bfd5971f630d9fa46ad3 |
