AI Score
Confidence
Low
EPSS
Percentile
5.1%
SSVC
Exploitation
none
Automatable
no
Technical Impact
partial
In the Linux kernel, the following vulnerability has been resolved:
bcache: fix variable length array abuse in btree_iter
btree_iter is used in two ways: either allocated on the stack with a
fixed size MAX_BSETS, or from a mempool with a dynamic size based on the
specific cache set. Previously, the struct had a fixed-length array of
size MAX_BSETS which was indexed out-of-bounds for the dynamically-sized
iterators, which causes UBSAN to complain.
This patch uses the same approach as in bcachefs’s sort_iter and splits
the iterator into a btree_iter with a flexible array member and a
btree_iter_stack which embeds a btree_iter as well as a fixed-length
data array.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "1da177e4c3f4",
"lessThan": "2c3d7b03b658",
"versionType": "git"
},
{
"status": "affected",
"version": "1da177e4c3f4",
"lessThan": "5a1922adc579",
"versionType": "git"
},
{
"status": "affected",
"version": "1da177e4c3f4",
"lessThan": "934e1e433185",
"versionType": "git"
},
{
"status": "affected",
"version": "1da177e4c3f4",
"lessThan": "6479b9f41583",
"versionType": "git"
},
{
"status": "affected",
"version": "1da177e4c3f4",
"lessThan": "0c31344e22dd",
"versionType": "git"
},
{
"status": "affected",
"version": "1da177e4c3f4",
"lessThan": "3a861560ccb3",
"versionType": "git"
}
],
"programFiles": [
"drivers/md/bcache/bset.c",
"drivers/md/bcache/bset.h",
"drivers/md/bcache/btree.c",
"drivers/md/bcache/super.c",
"drivers/md/bcache/sysfs.c",
"drivers/md/bcache/writeback.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "unaffected",
"version": "5.10.221",
"versionType": "custom",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.162",
"versionType": "custom",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.94",
"versionType": "custom",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.34",
"versionType": "custom",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.9.5",
"versionType": "custom",
"lessThanOrEqual": "6.9.*"
},
{
"status": "unaffected",
"version": "6.10",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/md/bcache/bset.c",
"drivers/md/bcache/bset.h",
"drivers/md/bcache/btree.c",
"drivers/md/bcache/super.c",
"drivers/md/bcache/sysfs.c",
"drivers/md/bcache/writeback.c"
],
"defaultStatus": "affected"
}
]
git.kernel.org/stable/c/0c31344e22dd8d6b1394c6e4c41d639015bdc671
git.kernel.org/stable/c/2c3d7b03b658dc8bfa6112b194b67b92a87e081b
git.kernel.org/stable/c/3a861560ccb35f2a4f0a4b8207fa7c2a35fc7f31
git.kernel.org/stable/c/5a1922adc5798b7ec894cd3f197afb6f9591b023
git.kernel.org/stable/c/6479b9f41583b013041943c4602e1ad61cec8148
git.kernel.org/stable/c/934e1e4331859183a861f396d7dfaf33cb5afb02