| From bippy-1.1.0 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-2022-49852: riscv: process: fix kernel info leakage |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| riscv: process: fix kernel info leakage |
| |
| thread_struct's s[12] may contain random kernel memory content, which |
| may be finally leaked to userspace. This is a security hole. Fix it |
| by clearing the s[12] array in thread_struct when fork. |
| |
| As for kthread case, it's better to clear the s[12] array as well. |
| |
| The Linux kernel CVE team has assigned CVE-2022-49852 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.15 with commit 7db91e57a0acde126a162ababfb1e0ab190130cb and fixed in 4.19.267 with commit c4601d30f7d989b4f354df899ab85b5f7a750d30 |
| Issue introduced in 4.15 with commit 7db91e57a0acde126a162ababfb1e0ab190130cb and fixed in 5.4.225 with commit c5c0b3167537793a7cf936fb240366eefd2fc7fb |
| Issue introduced in 4.15 with commit 7db91e57a0acde126a162ababfb1e0ab190130cb and fixed in 5.10.155 with commit e56d18a976dda653194218df6d40d8122c775712 |
| Issue introduced in 4.15 with commit 7db91e57a0acde126a162ababfb1e0ab190130cb and fixed in 5.15.79 with commit cc36c7fa5d9384602529ba3eea8c5daee7be4dbc |
| Issue introduced in 4.15 with commit 7db91e57a0acde126a162ababfb1e0ab190130cb and fixed in 6.0.9 with commit 358a68f98304b40b201ba5afe94c20355aa3dc68 |
| Issue introduced in 4.15 with commit 7db91e57a0acde126a162ababfb1e0ab190130cb and fixed in 6.1 with commit 6510c78490c490a6636e48b61eeaa6fb65981f4b |
| |
| 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-2022-49852 |
| 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: |
| arch/riscv/kernel/process.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/c4601d30f7d989b4f354df899ab85b5f7a750d30 |
| https://git.kernel.org/stable/c/c5c0b3167537793a7cf936fb240366eefd2fc7fb |
| https://git.kernel.org/stable/c/e56d18a976dda653194218df6d40d8122c775712 |
| https://git.kernel.org/stable/c/cc36c7fa5d9384602529ba3eea8c5daee7be4dbc |
| https://git.kernel.org/stable/c/358a68f98304b40b201ba5afe94c20355aa3dc68 |
| https://git.kernel.org/stable/c/6510c78490c490a6636e48b61eeaa6fb65981f4b |
