| From bippy-5f407fcff5a0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.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 0e28bf61a5f9ab30be3f3b4eafb8d097e39446bb and fixed in 6.11.8 with commit c75e0272289eae18c5379518a9c56ef31d65cc7d |
| Issue introduced in 6.11 with commit 0e28bf61a5f9ab30be3f3b4eafb8d097e39446bb and fixed in 6.12 with commit 04de7589e0a95167d803ecadd115235ba2c14997 |
| Issue introduced in 6.10.7 with commit 9e3b266afcfe4294e84496f50f006f029d3100db |
| |
| 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 |
