| 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-2024-46715: driver: iio: add missing checks on iio_info's callback access |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| driver: iio: add missing checks on iio_info's callback access |
| |
| Some callbacks from iio_info structure are accessed without any check, so |
| if a driver doesn't implement them trying to access the corresponding |
| sysfs entries produce a kernel oops such as: |
| |
| [ 2203.527791] Unable to handle kernel NULL pointer dereference at virtual address 00000000 when execute |
| [...] |
| [ 2203.783416] Call trace: |
| [ 2203.783429] iio_read_channel_info_avail from dev_attr_show+0x18/0x48 |
| [ 2203.789807] dev_attr_show from sysfs_kf_seq_show+0x90/0x120 |
| [ 2203.794181] sysfs_kf_seq_show from seq_read_iter+0xd0/0x4e4 |
| [ 2203.798555] seq_read_iter from vfs_read+0x238/0x2a0 |
| [ 2203.802236] vfs_read from ksys_read+0xa4/0xd4 |
| [ 2203.805385] ksys_read from ret_fast_syscall+0x0/0x54 |
| [ 2203.809135] Exception stack(0xe0badfa8 to 0xe0badff0) |
| [ 2203.812880] dfa0: 00000003 b6f10f80 00000003 b6eab000 00020000 00000000 |
| [ 2203.819746] dfc0: 00000003 b6f10f80 7ff00000 00000003 00000003 00000000 00020000 00000000 |
| [ 2203.826619] dfe0: b6e1bc88 bed80958 b6e1bc94 b6e1bcb0 |
| [ 2203.830363] Code: bad PC value |
| [ 2203.832695] ---[ end trace 0000000000000000 ]--- |
| |
| The Linux kernel CVE team has assigned CVE-2024-46715 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 6.1.109 with commit 0cc7e0ee31e5c44904e98e2229d591e093282a70 |
| Fixed in 6.6.50 with commit 72f022ebb9deac28663fa4c04ba315ed5d6654d1 |
| Fixed in 6.10.9 with commit dc537a72f64890d883d24ae4ac58733fc5bc523d |
| Fixed in 6.11 with commit c4ec8dedca961db056ec85cb7ca8c9f7e2e92252 |
| |
| 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-2024-46715 |
| 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/iio/industrialio-core.c |
| drivers/iio/industrialio-event.c |
| drivers/iio/inkern.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/0cc7e0ee31e5c44904e98e2229d591e093282a70 |
| https://git.kernel.org/stable/c/72f022ebb9deac28663fa4c04ba315ed5d6654d1 |
| https://git.kernel.org/stable/c/dc537a72f64890d883d24ae4ac58733fc5bc523d |
| https://git.kernel.org/stable/c/c4ec8dedca961db056ec85cb7ca8c9f7e2e92252 |
