CVE-2022-48635
fsdax: Fix infinite loop in dax_iomap_rw()
- Published
- Updated
- Reserved
- Assigned by
- Linux
Description
In the Linux kernel, the following vulnerability has been resolved: fsdax: Fix infinite loop in dax_iomap_rw() I got an infinite loop and a WARNING report when executing a tail command in virtiofs. WARNING: CPU: 10 PID: 964 at fs/iomap/iter.c:34 iomap_iter+0x3a2/0x3d0 Modules linked in: CPU: 10 PID: 964 Comm: tail Not tainted 5.19.0-rc7 Call Trace: <TASK> dax_iomap_rw+0xea/0x620 ? __this_cpu_preempt_check+0x13/0x20 fuse_dax_read_iter+0x47/0x80 fuse_file_read_iter+0xae/0xd0 new_sync_read+0xfe/0x180 ? 0xffffffff81000000 vfs_read+0x14d/0x1a0 ksys_read+0x6d/0xf0 __x64_sys_read+0x1a/0x20 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd The tail command will call read() with a count of 0. In this case, iomap_iter() will report this WARNING, and always return 1 which casuing the infinite loop in dax_iomap_rw(). Fixing by checking count whether is 0 in dax_iomap_rw().
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | Medium6.2 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVDNVD · Modified | 3.1 | Medium6.2 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.23% · top 86% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.2.
Weakness
Affected products
- affected 8df4919cb921b28809d05feae3e98dc5d8b48146 – < 463f36137c40342fb03bba380c1bf703c40d89a6
- affected ca289e0b95afa973d204c77a4ad5c37e06145fbf – < 929ef155e1da41c06f4d8ca86ae12b851a83a744
- affected ca289e0b95afa973d204c77a4ad5c37e06145fbf – < 60644dffac87b1bb47bdb393aa29d5f2ffcf41a0
- affected ca289e0b95afa973d204c77a4ad5c37e06145fbf – < 17d9c15c9b9e7fb285f7ac5367dfb5f00ff575e3
- affected 5.15
- unaffected < 5.15
- unaffected 5.15.71 – ≤ 5.15.*
- unaffected 5.19.12 – ≤ 5.19.*
- unaffected 6.0 – ≤ *
References (4)
- https://git.kernel.org/stable/c/463f36137c40342fb03bba380c1bf703c40d89a6 (opens in a new tab)
- https://git.kernel.org/stable/c/929ef155e1da41c06f4d8ca86ae12b851a83a744 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/60644dffac87b1bb47bdb393aa29d5f2ffcf41a0 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/17d9c15c9b9e7fb285f7ac5367dfb5f00ff575e3 (opens in a new tab)x_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2022-48635)Record last updated .