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Date: Tue, 27 Feb 2024 19:40:55 +0100 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-cve-announce@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org> Subject: CVE-2021-46953: ACPI: GTDT: Don't corrupt interrupt mappings on watchdow probe failure Description =========== In the Linux kernel, the following vulnerability has been resolved: ACPI: GTDT: Don't corrupt interrupt mappings on watchdow probe failure When failing the driver probe because of invalid firmware properties, the GTDT driver unmaps the interrupt that it mapped earlier. However, it never checks whether the mapping of the interrupt actially succeeded. Even more, should the firmware report an illegal interrupt number that overlaps with the GIC SGI range, this can result in an IPI being unmapped, and subsequent fireworks (as reported by Dann Frazier). Rework the driver to have a slightly saner behaviour and actually check whether the interrupt has been mapped before unmapping things. The Linux kernel CVE team has assigned CVE-2021-46953 to this issue. Affected and fixed versions =========================== Issue introduced in 4.12 with commit ca9ae5ec4ef0 and fixed in 4.14.233 with commit c3385a9122f8 Issue introduced in 4.12 with commit ca9ae5ec4ef0 and fixed in 4.19.191 with commit 7b2162db1498 Issue introduced in 4.12 with commit ca9ae5ec4ef0 and fixed in 5.4.118 with commit 504632a3577a Issue introduced in 4.12 with commit ca9ae5ec4ef0 and fixed in 5.10.36 with commit e0f2d86481ea Issue introduced in 4.12 with commit ca9ae5ec4ef0 and fixed in 5.11.20 with commit 42e69521ee1f Issue introduced in 4.12 with commit ca9ae5ec4ef0 and fixed in 5.12.3 with commit 596e079c362a Issue introduced in 4.12 with commit ca9ae5ec4ef0 and fixed in 5.13 with commit 1ecd5b129252 Please see https://www.kernel.org or 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-2021-46953 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/acpi/arm64/gtdt.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/c3385a9122f8db15b453e07bfc88117fce7f3724 https://git.kernel.org/stable/c/7b2162db1498c71962a4bb2f776fa4e76d4d305b https://git.kernel.org/stable/c/504632a3577a049dd9bb7aabae5b4476f9c586b4 https://git.kernel.org/stable/c/e0f2d86481eaa83df33b0793f75212919db7a19d https://git.kernel.org/stable/c/42e69521ee1fa5abf21f478d147d06bbfe6bf6a8 https://git.kernel.org/stable/c/596e079c362ac17ed02aa1b99fdc444d62072a01 https://git.kernel.org/stable/c/1ecd5b129252249b9bc03d7645a7bda512747277
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