| 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-2022-48879: efi: fix NULL-deref in init error path |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| efi: fix NULL-deref in init error path |
| |
| In cases where runtime services are not supported or have been disabled, |
| the runtime services workqueue will never have been allocated. |
| |
| Do not try to destroy the workqueue unconditionally in the unlikely |
| event that EFI initialisation fails to avoid dereferencing a NULL |
| pointer. |
| |
| The Linux kernel CVE team has assigned CVE-2022-48879 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.19.142 with commit 2ff3c97b47521d6700cc6485c7935908dcd2c27c and fixed in 4.19.270 with commit 585a0b2b3ae7903c6abee3087d09c69e955a7794 |
| Issue introduced in 5.4.61 with commit 5167f194da6947e19a3e970485ee3ccb44f7958d and fixed in 5.4.229 with commit 5fcf75a8a4c3e7ee9122d143684083c9faf20452 |
| Issue introduced in 5.9 with commit 98086df8b70c06234a8f4290c46064e44dafa0ed and fixed in 5.10.164 with commit 4ca71bc0e1995d15486cd7b60845602a28399cb5 |
| Issue introduced in 5.9 with commit 98086df8b70c06234a8f4290c46064e44dafa0ed and fixed in 5.15.89 with commit e2ea55564229e4bea1474af15b111b3a3043b76f |
| Issue introduced in 5.9 with commit 98086df8b70c06234a8f4290c46064e44dafa0ed and fixed in 6.1.7 with commit adc96d30f6503d30dc68670c013716f1d9fcc747 |
| Issue introduced in 5.9 with commit 98086df8b70c06234a8f4290c46064e44dafa0ed and fixed in 6.2 with commit 703c13fe3c9af557d312f5895ed6a5fda2711104 |
| Issue introduced in 5.7.18 with commit f591a42b8f9a9d20e01d0462f4f55d2176ac52ec |
| Issue introduced in 5.8.4 with commit e6584124b9823151ef586d10dedf565ade50cea6 |
| |
| 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-2022-48879 |
| 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/firmware/efi/efi.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/585a0b2b3ae7903c6abee3087d09c69e955a7794 |
| https://git.kernel.org/stable/c/5fcf75a8a4c3e7ee9122d143684083c9faf20452 |
| https://git.kernel.org/stable/c/4ca71bc0e1995d15486cd7b60845602a28399cb5 |
| https://git.kernel.org/stable/c/e2ea55564229e4bea1474af15b111b3a3043b76f |
| https://git.kernel.org/stable/c/adc96d30f6503d30dc68670c013716f1d9fcc747 |
| https://git.kernel.org/stable/c/703c13fe3c9af557d312f5895ed6a5fda2711104 |
