| 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-2022-49731: ata: libata-core: fix NULL pointer deref in ata_host_alloc_pinfo() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| ata: libata-core: fix NULL pointer deref in ata_host_alloc_pinfo() |
| |
| In an unlikely (and probably wrong?) case that the 'ppi' parameter of |
| ata_host_alloc_pinfo() points to an array starting with a NULL pointer, |
| there's going to be a kernel oops as the 'pi' local variable won't get |
| reassigned from the initial value of NULL. Initialize 'pi' instead to |
| '&ata_dummy_port_info' to fix the possible kernel oops for good... |
| |
| Found by Linux Verification Center (linuxtesting.org) with the SVACE static |
| analysis tool. |
| |
| The Linux kernel CVE team has assigned CVE-2022-49731 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 4.9.320 with commit ca4693e6e06e4fd2b240c0fec47aa2498c94848e |
| Fixed in 4.14.285 with commit 1ac5efee33f29e704226506d429b84575a5d66f8 |
| Fixed in 4.19.249 with commit a810bd5af06977a847d1f202b22d7defd5c62497 |
| Fixed in 5.4.200 with commit 253334f84c81bc6a43af489f108c0bddad989eef |
| Fixed in 5.10.124 with commit 36cd19e7d4e5571d77a2ed20c5b6ef50cf57734a |
| Fixed in 5.15.49 with commit ff128fbea720bf763fa345680dda5f050bc24a47 |
| Fixed in 5.18.6 with commit 07cbdb4807d369fbda73062a91b570c4dc5ec429 |
| Fixed in 5.19 with commit bf476fe22aa1851bab4728e0c49025a6a0bea307 |
| |
| 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-2022-49731 |
| 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/ata/libata-core.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/ca4693e6e06e4fd2b240c0fec47aa2498c94848e |
| https://git.kernel.org/stable/c/1ac5efee33f29e704226506d429b84575a5d66f8 |
| https://git.kernel.org/stable/c/a810bd5af06977a847d1f202b22d7defd5c62497 |
| https://git.kernel.org/stable/c/253334f84c81bc6a43af489f108c0bddad989eef |
| https://git.kernel.org/stable/c/36cd19e7d4e5571d77a2ed20c5b6ef50cf57734a |
| https://git.kernel.org/stable/c/ff128fbea720bf763fa345680dda5f050bc24a47 |
| https://git.kernel.org/stable/c/07cbdb4807d369fbda73062a91b570c4dc5ec429 |
| https://git.kernel.org/stable/c/bf476fe22aa1851bab4728e0c49025a6a0bea307 |
