# CVE-2022-48840: linux: In the Linux kernel, the following vulnerability has been resolved:  iavf: Fix hang during reboot/shutdown  Recent co...

CVE-2022-48840 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-48840, released July 16, 2024. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2022-48840
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0024
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 16, 2024

## Description

In the Linux kernel, the following vulnerability has been resolved:  iavf: Fix hang during reboot/shutdown  Recent commit 974578017fc1 ("iavf: Add waiting so the port is initialized in remove") adds a wait-loop at the beginning of iavf_remove() to ensure that port initialization is finished prior unregistering net device. This causes a regression in reboot/shutdown scenario because in this case callback iavf_shutdown() is called and this callback detaches the device, makes it down if it is running and sets its state to __IAVF_REMOVE. Later shutdown callback of associated PF driver (e.g. ice_shutdown) is called. That callback calls among other things sriov_disable() that calls indirectly iavf_remove() (see stack trace below). As the adapter state is already __IAVF_REMOVE then the mentioned loop is end-less and shutdown process hangs.  The patch fixes this by checking adapter's state at the beginning of iavf_remove() and skips the rest of the function if the adapter is already in remove state (shutdown is in progress).  Reproducer: 1. Create VF on PF driven by ice or i40e driver 2. Ensure that the VF is bound to iavf driver 3. Reboot  [52625.981294] sysrq: SysRq : Show Blocked State [52625.988377] task:reboot          state:D stack:    0 pid:17359 ppid:     1 f2 [52625.996732] Call Trace: [52625.999187]  __schedule+0x2d1/0x830 [52626.007400]  schedule+0x35/0xa0 [52626.010545]  schedule_hrtimeout_range_clock+0x83/0x100 [52626.020046]  usleep_range+0x5b/0x80 [52626.023540]  iavf_remove+0x63/0x5b0 [iavf] [52626.027645]  pci_device_remove+0x3b/0xc0 [52626.031572]  device_release_driver_internal+0x103/0x1f0 [52626.036805]  pci_stop_bus_device+0x72/0xa0 [52626.040904]  pci_stop_and_remove_bus_device+0xe/0x20 [52626.045870]  pci_iov_remove_virtfn+0xba/0x120 [52626.050232]  sriov_disable+0x2f/0xe0 [52626.053813]  ice_free_vfs+0x7c/0x340 [ice] [52626.057946]  ice_remove+0x220/0x240 [ice] [52626.061967]  ice_shutdown+0x16/0x50 [ice] [52626.065987]  pci_device_shutdown+0x34/0x60 [52626.070086]  device_shutdown+0x165/0x1c5 [52626.074011]  kernel_restart+0xe/0x30 [52626.077593]  __do_sys_reboot+0x1d2/0x210 [52626.093815]  do_syscall_64+0x5b/0x1a0 [52626.097483]  entry_SYSCALL_64_after_hwframe+0x65/0xca

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 5.17.3-1 | [DEBIAN-CVE-2022-48840](https://patchblox.com/security/data/fix/linux/debian-cve-2022-48840.md) | Jul 16, 2024 |
| Linux | linux Debian 13.5 (trixie) | 5.17.3-1 | [DEBIAN-CVE-2022-48840](https://patchblox.com/security/data/fix/linux/debian-cve-2022-48840.md) | Jul 16, 2024 |
| Linux | linux Debian 14 | 5.17.3-1 | [DEBIAN-CVE-2022-48840](https://patchblox.com/security/data/fix/linux/debian-cve-2022-48840.md) | Jul 16, 2024 |

---

Data as of 2026-11-08T00:53:09Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.