From bippy-c9c4e1df01b2 Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman To: Reply-to: , 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 f80d26043af9 and fixed in 6.1.93 with commit b8938d6f570f Issue introduced in 6.1 with commit f80d26043af9 and fixed in 6.6.33 with commit 9dce01f386c9 Issue introduced in 6.1 with commit f80d26043af9 and fixed in 6.9.4 with commit 6ca67a5fe1c6 Issue introduced in 6.1 with commit f80d26043af9 and fixed in 6.10 with commit 4b2543f7e1e6 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