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 ]—
Vendor | Product | Version | CPE |
---|---|---|---|
linux | linux_kernel | * | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
[
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"drivers/iio/industrialio-core.c",
"drivers/iio/industrialio-event.c",
"drivers/iio/inkern.c"
],
"versions": [
{
"version": "1da177e4c3f4",
"lessThan": "0cc7e0ee31e5",
"status": "affected",
"versionType": "git"
},
{
"version": "1da177e4c3f4",
"lessThan": "72f022ebb9de",
"status": "affected",
"versionType": "git"
},
{
"version": "1da177e4c3f4",
"lessThan": "dc537a72f648",
"status": "affected",
"versionType": "git"
},
{
"version": "1da177e4c3f4",
"lessThan": "c4ec8dedca96",
"status": "affected",
"versionType": "git"
}
]
},
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "affected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"drivers/iio/industrialio-core.c",
"drivers/iio/industrialio-event.c",
"drivers/iio/inkern.c"
],
"versions": [
{
"version": "6.1.109",
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "6.6.50",
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "6.10.9",
"lessThanOrEqual": "6.10.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "6.11",
"lessThanOrEqual": "*",
"status": "unaffected",
"versionType": "original_commit_for_fix"
}
]
}
]