loop: Fix use-after-free issues
In the Linux kernel, the following vulnerability has been resolved: loop: Fix use-after-free issues do_req_filebacked() calls blk_mq_complete_request() synchronously or asynchronously when using asynchronous I/O unless memory allocation fails. Hence, modify loop_handle_cmd() such that it does not dereference 'cmd' nor 'rq' after do_req_filebacked() finished unless we are sure that the request has not yet been completed. This patch fixes the following kernel crash: Unable to handle kernel NULL pointer dereference at virtual address 0000000000000054 Call trace: css_put.42938+0x1c/0x1ac loop_process_work+0xc8c/0xfd4 loop_rootcg_workfn+0x24/0x34 process_one_work+0x244/0x558 worker_thread+0x400/0x8fc kthread+0x16c/0x1e0 ret_from_fork+0x10/0x20
CVE-2023-53111
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2023-53111
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "bc07c10a3603a5ab3ef01ba42b3d41f9ac63d1b6",
"lessThan": "407badf73ec9fb0d5744bf2ca1745c1818aa222f",
"versionType": "git"
},
{
"status": "affected",
"version": "bc07c10a3603a5ab3ef01ba42b3d41f9ac63d1b6",
"lessThan": "e3fda704903f6d1fc351412f1bc6620333959ada",
"versionType": "git"
},
{
"status": "affected",
"version": "bc07c10a3603a5ab3ef01ba42b3d41f9ac63d1b6",
"lessThan": "6917395c4667cfb607ed8bf1826205a59414657c",
"versionType": "git"
},
{
"status": "affected",
"version": "bc07c10a3603a5ab3ef01ba42b3d41f9ac63d1b6",
"lessThan": "9b0cb770f5d7b1ff40bea7ca385438ee94570eec",
"versionType": "git"
}
],
"programFiles": [
"drivers/block/loop.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.4"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.4",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.15.104",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.21",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.2.8",
"versionType": "semver",
"lessThanOrEqual": "6.2.*"
},
{
"status": "unaffected",
"version": "6.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/block/loop.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2023-53111
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #30259 · Revision 1
- Added to Heist Feed
- Publisher date