| 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-2024-33619: efi: libstub: only free priv.runtime_map when allocated |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| efi: libstub: only free priv.runtime_map when allocated |
| |
| priv.runtime_map is only allocated when efi_novamap is not set. |
| Otherwise, it is an uninitialized value. In the error path, it is freed |
| unconditionally. Avoid passing an uninitialized value to free_pool. |
| Free priv.runtime_map only when it was allocated. |
| |
| This bug was discovered and resolved using Coverity Static Analysis |
| Security Testing (SAST) by Synopsys, Inc. |
| |
| The Linux kernel CVE team has assigned CVE-2024-33619 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.1 with commit f80d26043af91ceb5036c478101c015edb9e7630 and fixed in 6.1.93 with commit b8938d6f570f010a1dcdbfed3e5b5d3258c2a908 |
| Issue introduced in 6.1 with commit f80d26043af91ceb5036c478101c015edb9e7630 and fixed in 6.6.33 with commit 9dce01f386c9ce6990c0a83fa14b1c95330b037e |
| Issue introduced in 6.1 with commit f80d26043af91ceb5036c478101c015edb9e7630 and fixed in 6.9.4 with commit 6ca67a5fe1c606d1fbe24c30a9fc0bdc43a18554 |
| Issue introduced in 6.1 with commit f80d26043af91ceb5036c478101c015edb9e7630 and fixed in 6.10 with commit 4b2543f7e1e6b91cfc8dd1696e3cdf01c3ac8974 |
| |
| 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-2024-33619 |
| 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: |
| drivers/firmware/efi/libstub/fdt.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/b8938d6f570f010a1dcdbfed3e5b5d3258c2a908 |
| https://git.kernel.org/stable/c/9dce01f386c9ce6990c0a83fa14b1c95330b037e |
| https://git.kernel.org/stable/c/6ca67a5fe1c606d1fbe24c30a9fc0bdc43a18554 |
| https://git.kernel.org/stable/c/4b2543f7e1e6b91cfc8dd1696e3cdf01c3ac8974 |
