# CVE-2022-49928: linux: In the Linux kernel, the following vulnerability has been resolved:  SUNRPC: Fix null-ptr-deref when xps sysfs alloc...

CVE-2022-49928 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-49928, released May 1, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2022-49928
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0036
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 1, 2025

## Description

In the Linux kernel, the following vulnerability has been resolved:  SUNRPC: Fix null-ptr-deref when xps sysfs alloc failed  There is a null-ptr-deref when xps sysfs alloc failed:   BUG: KASAN: null-ptr-deref in sysfs_do_create_link_sd+0x40/0xd0   Read of size 8 at addr 0000000000000030 by task gssproxy/457    CPU: 5 PID: 457 Comm: gssproxy Not tainted 6.0.0-09040-g02357b27ee03 #9   Call Trace:    <TASK>    dump_stack_lvl+0x34/0x44    kasan_report+0xa3/0x120    sysfs_do_create_link_sd+0x40/0xd0    rpc_sysfs_client_setup+0x161/0x1b0    rpc_new_client+0x3fc/0x6e0    rpc_create_xprt+0x71/0x220    rpc_create+0x1d4/0x350    gssp_rpc_create+0xc3/0x160    set_gssp_clnt+0xbc/0x140    write_gssp+0x116/0x1a0    proc_reg_write+0xd6/0x130    vfs_write+0x177/0x690    ksys_write+0xb9/0x150    do_syscall_64+0x35/0x80    entry_SYSCALL_64_after_hwframe+0x46/0xb0  When the xprt_switch sysfs alloc failed, should not add xprt and switch sysfs to it, otherwise, maybe null-ptr-deref; also initialize the 'xps_sysfs' to NULL to avoid oops when destroy it.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.0.8-1 | [DEBIAN-CVE-2022-49928](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49928.md) | May 1, 2025 |
| Linux | linux Debian 13.5 (trixie) | 6.0.8-1 | [DEBIAN-CVE-2022-49928](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49928.md) | May 1, 2025 |
| Linux | linux Debian 14 | 6.0.8-1 | [DEBIAN-CVE-2022-49928](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49928.md) | May 1, 2025 |

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Data as of 2026-11-08T06:59:42Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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