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Message-ID: <2024111941-CVE-2024-50281-f70e@gregkh> Date: Tue, 19 Nov 2024 02:32:36 +0100 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-cve-announce@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org> Subject: CVE-2024-50281: KEYS: trusted: dcp: fix NULL dereference in AEAD crypto operation Description =========== In the Linux kernel, the following vulnerability has been resolved: KEYS: trusted: dcp: fix NULL dereference in AEAD crypto operation When sealing or unsealing a key blob we currently do not wait for the AEAD cipher operation to finish and simply return after submitting the request. If there is some load on the system we can exit before the cipher operation is done and the buffer we read from/write to is already removed from the stack. This will e.g. result in NULL pointer dereference errors in the DCP driver during blob creation. Fix this by waiting for the AEAD cipher operation to finish before resuming the seal and unseal calls. The Linux kernel CVE team has assigned CVE-2024-50281 to this issue. Affected and fixed versions =========================== Issue introduced in 6.11 with commit 0e28bf61a5f9 and fixed in 6.11.8 with commit c75e0272289e Issue introduced in 6.11 with commit 0e28bf61a5f9 and fixed in 6.12 with commit 04de7589e0a9 Issue introduced in 6.10.7 with commit 9e3b266afcfe 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-2024-50281 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: security/keys/trusted-keys/trusted_dcp.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/c75e0272289eae18c5379518a9c56ef31d65cc7d https://git.kernel.org/stable/c/04de7589e0a95167d803ecadd115235ba2c14997
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