CVE-2023-53783
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2023
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
blk-iocost: fix divide by 0 error in calc_lcoefs()
In the Linux kernel, the following vulnerability has been resolved: blk-iocost: fix divide by 0 error in calc_lcoefs() echo max of u64 to cost.model can cause divide by 0 error. # echo 8:0 rbps=18446744073709551615 > /sys/fs/cgroup/io.cost.model divide error: 0000 [#1] PREEMPT SMP RIP: 0010:calc_lcoefs+0x4c/0xc0 Call Trace: <TASK> ioc_refresh_params+0x2b3/0x4f0 ioc_cost_model_write+0x3cb/0x4c0 ? _copy_from_iter+0x6d/0x6c0 ? kernfs_fop_write_iter+0xfc/0x270 cgroup_file_write+0xa0/0x200 kernfs_fop_write_iter+0x17d/0x270 vfs_write+0x414/0x620 ksys_write+0x73/0x160 __x64_sys_write+0x1e/0x30 do_syscall_64+0x35/0x80 entry_SYSCALL_64_after_hwframe+0x63/0xcd calc_lcoefs() uses the input value of cost.model in DIV_ROUND_UP_ULL, overflow would happen if bps plus IOC_PAGE_SIZE is greater than ULLONG_MAX, it can cause divide by 0 error. Fix the problem by setting basecost
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 7caa47151ab2e644dd221f741ec7578d9532c9a3 | affected | git | 9e8bf9f95f7a299fa9ea45b678d001806ad5e12c | Unavailable | None listed |
| 7caa47151ab2e644dd221f741ec7578d9532c9a3 | affected | git | 6e291810fe83a384700eb24a1f714966391ed562 | Unavailable | None listed |
| 7caa47151ab2e644dd221f741ec7578d9532c9a3 | affected | git | 3538ade9d8c2ba41088e395de916f2599fadba8f | Unavailable | None listed |
| 7caa47151ab2e644dd221f741ec7578d9532c9a3 | affected | git | bf8eb1fd6110871e6232e8e7efe399276ef7e6f6 | Unavailable | None listed |
| 7caa47151ab2e644dd221f741ec7578d9532c9a3 | affected | git | b96d7b4a9745fbd0c8384608ceb1f50415e862fa | Unavailable | None listed |
| 7caa47151ab2e644dd221f741ec7578d9532c9a3 | affected | git | 984af1e66b4126cf145153661cc24c213e2ec231 | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 5.4 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 5.4 | Unavailable | None listed |
| 5.4.235 | unaffected | semver | Unavailable | 5.4.* | None listed |
| 5.10.173 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.99 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.16 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.2.3 | unaffected | semver | Unavailable | 6.2.* | None listed |
| 6.3 | unaffected | original_commit_for_fix | Unavailable | * | None listed |