| 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-2023-52606: powerpc/lib: Validate size for vector operations |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| powerpc/lib: Validate size for vector operations |
| |
| Some of the fp/vmx code in sstep.c assume a certain maximum size for the |
| instructions being emulated. The size of those operations however is |
| determined separately in analyse_instr(). |
| |
| Add a check to validate the assumption on the maximum size of the |
| operations, so as to prevent any unintended kernel stack corruption. |
| |
| The Linux kernel CVE team has assigned CVE-2023-52606 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 4.19.307 with commit 42084a428a139f1a429f597d44621e3a18f3e414 |
| Fixed in 5.4.269 with commit 0580f4403ad33f379eef865c2a6fe94de37febdf |
| Fixed in 5.10.210 with commit beee482cc4c9a6b1dcffb2e190b4fd8782258678 |
| Fixed in 5.15.149 with commit de4f5ed63b8a199704d8cdcbf810309d7eb4b36b |
| Fixed in 6.1.77 with commit abd26515d4b767ba48241eea77b28ce0872aef3e |
| Fixed in 6.6.16 with commit 28b8ba8eebf26f66d9f2df4ba550b6b3b136082c |
| Fixed in 6.7.4 with commit 848e1d7fd710900397e1d0e7584680c1c04e3afd |
| Fixed in 6.8 with commit 8f9abaa6d7de0a70fc68acaedce290c1f96e2e59 |
| |
| 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-2023-52606 |
| 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/powerpc/lib/sstep.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/42084a428a139f1a429f597d44621e3a18f3e414 |
| https://git.kernel.org/stable/c/0580f4403ad33f379eef865c2a6fe94de37febdf |
| https://git.kernel.org/stable/c/beee482cc4c9a6b1dcffb2e190b4fd8782258678 |
| https://git.kernel.org/stable/c/de4f5ed63b8a199704d8cdcbf810309d7eb4b36b |
| https://git.kernel.org/stable/c/abd26515d4b767ba48241eea77b28ce0872aef3e |
| https://git.kernel.org/stable/c/28b8ba8eebf26f66d9f2df4ba550b6b3b136082c |
| https://git.kernel.org/stable/c/848e1d7fd710900397e1d0e7584680c1c04e3afd |
| https://git.kernel.org/stable/c/8f9abaa6d7de0a70fc68acaedce290c1f96e2e59 |
