AI Score
Confidence
Low
EPSS
Percentile
10.3%
SSVC
Exploitation
none
Automatable
no
Technical Impact
partial
In the Linux kernel, the following vulnerability has been resolved:
block/rnbd-srv: Check for unlikely string overflow
Since “dev_search_path” can technically be as large as PATH_MAX,
there was a risk of truncation when copying it and a second string
into “full_path” since it was also PATH_MAX sized. The W=1 builds were
reporting this warning:
drivers/block/rnbd/rnbd-srv.c: In function ‘process_msg_open.isra’:
drivers/block/rnbd/rnbd-srv.c:616:51: warning: ‘%s’ directive output may be truncated writing up to 254 bytes into a region of size between 0 and 4095 [-Wformat-truncation=]
616 | snprintf(full_path, PATH_MAX, “%s/%s”,
| ^~
In function ‘rnbd_srv_get_full_path’,
inlined from ‘process_msg_open.isra’ at drivers/block/rnbd/rnbd-srv.c:721:14: drivers/block/rnbd/rnbd-srv.c:616:17: note: ‘snprintf’ output between 2 and 4351 bytes into a destination of size 4096
616 | snprintf(full_path, PATH_MAX, “%s/%s”,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
617 | dev_search_path, dev_name);
| ~~~~~~~~~~~~~~~~~~~~~~~~~~
To fix this, unconditionally check for truncation (as was already done
for the case where “%SESSNAME%” was present).
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "1da177e4c3f4",
"lessThan": "95bc866c1197",
"versionType": "git"
},
{
"status": "affected",
"version": "1da177e4c3f4",
"lessThan": "f6abd5e17da3",
"versionType": "git"
},
{
"status": "affected",
"version": "1da177e4c3f4",
"lessThan": "af7bbdac8973",
"versionType": "git"
},
{
"status": "affected",
"version": "1da177e4c3f4",
"lessThan": "5b9ea86e6620",
"versionType": "git"
},
{
"status": "affected",
"version": "1da177e4c3f4",
"lessThan": "a2c6206f1810",
"versionType": "git"
},
{
"status": "affected",
"version": "1da177e4c3f4",
"lessThan": "9e4bf6a08d1e",
"versionType": "git"
}
],
"programFiles": [
"drivers/block/rnbd/rnbd-srv.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "unaffected",
"version": "5.10.210",
"versionType": "custom",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.149",
"versionType": "custom",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.77",
"versionType": "custom",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.16",
"versionType": "custom",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.7.4",
"versionType": "custom",
"lessThanOrEqual": "6.7.*"
},
{
"status": "unaffected",
"version": "6.8",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/block/rnbd/rnbd-srv.c"
],
"defaultStatus": "affected"
}
]
git.kernel.org/stable/c/5b9ea86e662035a886ccb5c76d56793cba618827
git.kernel.org/stable/c/95bc866c11974d3e4a9d922275ea8127ff809cf7
git.kernel.org/stable/c/9e4bf6a08d1e127bcc4bd72557f2dfafc6bc7f41
git.kernel.org/stable/c/a2c6206f18104fba7f887bf4dbbfe4c41adc4339
git.kernel.org/stable/c/af7bbdac89739e2e7380387fda598848d3b7010f
git.kernel.org/stable/c/f6abd5e17da33eba15df2bddc93413e76c2b55f7
lists.debian.org/debian-lts-announce/2024/06/msg00017.html