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Date: Mon, 18 Mar 2024 10:15:01 +0000 From: Lee Jones <lee@...nel.org> To: linux-cve-announce@...r.kernel.org Cc: Lee Jones <lee@...nel.org> Subject: CVE-2023-52616: crypto: lib/mpi - Fix unexpected pointer access in mpi_ec_init Description =========== In the Linux kernel, the following vulnerability has been resolved: crypto: lib/mpi - Fix unexpected pointer access in mpi_ec_init When the mpi_ec_ctx structure is initialized, some fields are not cleared, causing a crash when referencing the field when the structure was released. Initially, this issue was ignored because memory for mpi_ec_ctx is allocated with the __GFP_ZERO flag. For example, this error will be triggered when calculating the Za value for SM2 separately. The Linux kernel CVE team has assigned CVE-2023-52616 to this issue. Affected and fixed versions =========================== Issue introduced in 5.10 with commit d58bb7e55a8a and fixed in 5.10.210 with commit 0c3687822259 Issue introduced in 5.10 with commit d58bb7e55a8a and fixed in 5.15.149 with commit 2bb86817b33c Issue introduced in 5.10 with commit d58bb7e55a8a and fixed in 6.1.79 with commit bb44477d4506 Issue introduced in 5.10 with commit d58bb7e55a8a and fixed in 6.6.15 with commit 7ebf812b7019 Issue introduced in 5.10 with commit d58bb7e55a8a and fixed in 6.7.3 with commit 7abdfd45a650 Issue introduced in 5.10 with commit d58bb7e55a8a and fixed in 6.8 with commit ba3c55742030 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-2023-52616 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/crypto/mpi/ec.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/0c3687822259a7628c85cd21a3445cbe3c367165 https://git.kernel.org/stable/c/2bb86817b33c9d704e127f92b838035a72c315b6 https://git.kernel.org/stable/c/bb44477d4506e52785693a39f03cdc6a2c5e8598 https://git.kernel.org/stable/c/7ebf812b7019fd2d4d5a7ca45ef4bf3a6f4bda0a https://git.kernel.org/stable/c/7abdfd45a650c714d5ebab564bb1b988f14d9b49 https://git.kernel.org/stable/c/ba3c5574203034781ac4231acf117da917efcd2a
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