CVE-2024-46735
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2024-46735
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2024-46735.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2024-46735
- Downstream
- Related
- Published
- 2024-09-18T08:15:03Z
- Modified
- 2025-08-09T20:01:26Z
- Severity
-
- 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- [none]
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
ublkdrv: fix NULL pointer dereference in ublkctrlstartrecovery()
When two UBLKCMDSTARTUSERRECOVERY commands are submitted, the first one sets 'ubq->ubqdaemon' to NULL, and the second one triggers WARN in ublkqueue_reinit() and subsequently a NULL pointer dereference issue.
Fix it by adding the check in ublkctrlstartrecovery() and return immediately in case of zero 'ub->nrqueues_ready'.
BUG: kernel NULL pointer dereference, address: 0000000000000028 RIP: 0010:ublkctrlstartrecovery.constprop.0+0x82/0x180 Call Trace: <TASK> ? _die+0x20/0x70 ? pagefaultoops+0x75/0x170 ? excpagefault+0x64/0x140 ? asmexcpagefault+0x22/0x30 ? ublkctrlstartrecovery.constprop.0+0x82/0x180 ublkctrluringcmd+0x4f7/0x6c0 ? picknexttaskidle+0x26/0x40 iouringcmd+0x9a/0x1b0 ioissuesqe+0x193/0x3f0 iowqsubmitwork+0x9b/0x390 ioworkerhandlework+0x165/0x360 iowqworker+0xcb/0x2f0 ? finishtaskswitch.isra.0+0x203/0x290 ? finishtaskswitch.isra.0+0x203/0x290 ? _pfxiowqworker+0x10/0x10 retfromfork+0x2d/0x50 ? _pfxiowqworker+0x10/0x10 retfromfork_asm+0x1a/0x30 </TASK>
- References