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Message-ID: <2024051750-CVE-2023-52679-948f@gregkh> Date: Fri, 17 May 2024 16:26:52 +0200 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-cve-announce@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org> Subject: CVE-2023-52679: of: Fix double free in of_parse_phandle_with_args_map Description =========== In the Linux kernel, the following vulnerability has been resolved: of: Fix double free in of_parse_phandle_with_args_map In of_parse_phandle_with_args_map() the inner loop that iterates through the map entries calls of_node_put(new) to free the reference acquired by the previous iteration of the inner loop. This assumes that the value of "new" is NULL on the first iteration of the inner loop. Make sure that this is true in all iterations of the outer loop by setting "new" to NULL after its value is assigned to "cur". Extend the unittest to detect the double free and add an additional test case that actually triggers this path. The Linux kernel CVE team has assigned CVE-2023-52679 to this issue. Affected and fixed versions =========================== Issue introduced in 4.17 with commit bd6f2fd5a1d5 and fixed in 4.19.306 with commit 26b4d702c44f Issue introduced in 4.17 with commit bd6f2fd5a1d5 and fixed in 5.4.268 with commit a0a061151a62 Issue introduced in 4.17 with commit bd6f2fd5a1d5 and fixed in 5.10.209 with commit d5f490343c77 Issue introduced in 4.17 with commit bd6f2fd5a1d5 and fixed in 5.15.148 with commit 454100408452 Issue introduced in 4.17 with commit bd6f2fd5a1d5 and fixed in 6.1.75 with commit b9d760dae5b1 Issue introduced in 4.17 with commit bd6f2fd5a1d5 and fixed in 6.6.14 with commit b64d09a4e859 Issue introduced in 4.17 with commit bd6f2fd5a1d5 and fixed in 6.7.2 with commit cafa99213412 Issue introduced in 4.17 with commit bd6f2fd5a1d5 and fixed in 6.8 with commit 4dde83569832 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-2023-52679 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/of/base.c drivers/of/unittest-data/tests-phandle.dtsi drivers/of/unittest.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/26b4d702c44f9e5cf3c5c001ae619a4a001889db https://git.kernel.org/stable/c/a0a061151a6200c13149dbcdb6c065203c8425d2 https://git.kernel.org/stable/c/d5f490343c77e6708b6c4aa7dbbfbcbb9546adea https://git.kernel.org/stable/c/4541004084527ce9e95a818ebbc4e6b293ffca21 https://git.kernel.org/stable/c/b9d760dae5b10e73369b769073525acd7b3be2bd https://git.kernel.org/stable/c/b64d09a4e8596f76d27f4b4a90a1cf6baf6a82f8 https://git.kernel.org/stable/c/cafa992134124e785609a406da4ff2b54052aff7 https://git.kernel.org/stable/c/4dde83569832f9377362e50f7748463340c5db6b
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