| 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-2024-27406: lib/Kconfig.debug: TEST_IOV_ITER depends on MMU |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| lib/Kconfig.debug: TEST_IOV_ITER depends on MMU |
| |
| Trying to run the iov_iter unit test on a nommu system such as the qemu |
| kc705-nommu emulation results in a crash. |
| |
| KTAP version 1 |
| # Subtest: iov_iter |
| # module: kunit_iov_iter |
| 1..9 |
| BUG: failure at mm/nommu.c:318/vmap()! |
| Kernel panic - not syncing: BUG! |
| |
| The test calls vmap() directly, but vmap() is not supported on nommu |
| systems, causing the crash. TEST_IOV_ITER therefore needs to depend on |
| MMU. |
| |
| The Linux kernel CVE team has assigned CVE-2024-27406 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.6 with commit 2d71340ff1d41a5b9fc1b30ded12d638b2e2ae96 and fixed in 6.6.19 with commit e6316749d603fe9c4c91f6ec3694e06e4de632a3 |
| Issue introduced in 6.6 with commit 2d71340ff1d41a5b9fc1b30ded12d638b2e2ae96 and fixed in 6.7.7 with commit 9e6e541b97762d5b1143070067f7c68f39a408f8 |
| Issue introduced in 6.6 with commit 2d71340ff1d41a5b9fc1b30ded12d638b2e2ae96 and fixed in 6.8 with commit 1eb1e984379e2da04361763f66eec90dd75cf63e |
| |
| 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-2024-27406 |
| 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: |
| lib/Kconfig.debug |
| |
| |
| 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/e6316749d603fe9c4c91f6ec3694e06e4de632a3 |
| https://git.kernel.org/stable/c/9e6e541b97762d5b1143070067f7c68f39a408f8 |
| https://git.kernel.org/stable/c/1eb1e984379e2da04361763f66eec90dd75cf63e |
