Bugzilla – Bug 1227943
VUL-0: CVE-2022-48782: kernel: mctp: fix use after free
Last modified: 2024-07-18 15:49:21 UTC
Description =========== In the Linux kernel, the following vulnerability has been resolved: mctp: fix use after free Clang static analysis reports this problem route.c:425:4: warning: Use of memory after it is freed trace_mctp_key_acquire(key); ^~~~~~~~~~~~~~~~~~~~~~~~~~~ When mctp_key_add() fails, key is freed but then is later used in trace_mctp_key_acquire(). Add an else statement to use the key only when mctp_key_add() is successful. The Linux kernel CVE team has assigned CVE-2022-48782 to this issue. Affected and fixed versions =========================== Issue introduced in 5.16 with commit 4f9e1ba6de45 and fixed in 5.16.11 with commit 1dd3ecbec5f6 Issue introduced in 5.16 with commit 4f9e1ba6de45 and fixed in 5.17 with commit 7e5b6a5c8c44 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-2022-48782 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: net/mctp/route.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/1dd3ecbec5f606b2a526c47925c8634b1a6bb81e https://git.kernel.org/stable/c/7e5b6a5c8c44310784c88c1c198dde79f6402f7b References: http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2022-48782 https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2022/CVE-2022-48782.mbox https://git.kernel.org/stable/c/1dd3ecbec5f606b2a526c47925c8634b1a6bb81e https://git.kernel.org/stable/c/7e5b6a5c8c44310784c88c1c198dde79f6402f7b