| 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-2023-52450: perf/x86/intel/uncore: Fix NULL pointer dereference issue in upi_fill_topology() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| perf/x86/intel/uncore: Fix NULL pointer dereference issue in upi_fill_topology() |
| |
| Get logical socket id instead of physical id in discover_upi_topology() |
| to avoid out-of-bound access on 'upi = &type->topology[nid][idx];' line |
| that leads to NULL pointer dereference in upi_fill_topology() |
| |
| The Linux kernel CVE team has assigned CVE-2023-52450 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.2 with commit f680b6e6062ef3c944ffc966d685f067958fca33 and fixed in 6.6.14 with commit bf1bf09e6b599758851457f3999779622a48d015 |
| Issue introduced in 6.2 with commit f680b6e6062ef3c944ffc966d685f067958fca33 and fixed in 6.7.2 with commit 3d6f4a78b104c65e4256c3776c9949f49a1b459e |
| Issue introduced in 6.2 with commit f680b6e6062ef3c944ffc966d685f067958fca33 and fixed in 6.8 with commit 1692cf434ba13ee212495b5af795b6a07e986ce4 |
| |
| 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-2023-52450 |
| 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/x86/events/intel/uncore_snbep.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/bf1bf09e6b599758851457f3999779622a48d015 |
| https://git.kernel.org/stable/c/3d6f4a78b104c65e4256c3776c9949f49a1b459e |
| https://git.kernel.org/stable/c/1692cf434ba13ee212495b5af795b6a07e986ce4 |
