CVE-2022-50314
nbd: Fix hung when signal interrupts nbd_start_device_ioctl()
- Published
- Updated
- Reserved
- Assigned by
- Linux
Description
In the Linux kernel, the following vulnerability has been resolved: nbd: Fix hung when signal interrupts nbd_start_device_ioctl() syzbot reported hung task [1]. The following program is a simplified version of the reproducer: int main(void) { int sv[2], fd; if (socketpair(AF_UNIX, SOCK_STREAM, 0, sv) < 0) return 1; if ((fd = open("/dev/nbd0", 0)) < 0) return 1; if (ioctl(fd, NBD_SET_SIZE_BLOCKS, 0x81) < 0) return 1; if (ioctl(fd, NBD_SET_SOCK, sv[0]) < 0) return 1; if (ioctl(fd, NBD_DO_IT) < 0) return 1; return 0; } When signal interrupt nbd_start_device_ioctl() waiting the condition atomic_read(&config->recv_threads) == 0, the task can hung because it waits the completion of the inflight IOs. This patch fixes the issue by clearing queue, not just shutdown, when signal interrupt nbd_start_device_ioctl().
Timeline
ID reserved
By Linux
Published
- 14 months later
· 14 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Analyzed | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.16% · top 95% of all CVEs (7 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 5.5.
Affected products
- affected 5ea8d10802ec4c153a6e21eebaf412e2abd29736 – < 3ba3846cb3e2fb3c6fbf79e998472821b298419e
- affected 5ea8d10802ec4c153a6e21eebaf412e2abd29736 – < c7b4641bd2395c2f3cd3b0a0cbf292ed9d489398
- affected 5ea8d10802ec4c153a6e21eebaf412e2abd29736 – < 3575949513ea3b387b30dac1e69468a923c86caf
- affected 5ea8d10802ec4c153a6e21eebaf412e2abd29736 – < b2700f98b3f4dd19fb4315b70581e5caff89eb49
- affected 5ea8d10802ec4c153a6e21eebaf412e2abd29736 – < c0d73be0af8c1310713bc39a8d7a22e35084e14f
- affected 5ea8d10802ec4c153a6e21eebaf412e2abd29736 – < 62006a72b05e0d38727eef5188700f2488be5e89
- affected 5ea8d10802ec4c153a6e21eebaf412e2abd29736 – < 35fb7d4a53d9e36d1b91161ea9870d9c6d57dccf
- affected 5ea8d10802ec4c153a6e21eebaf412e2abd29736 – < 1de7c3cf48fc41cd95adb12bd1ea9033a917798a
- affected 4.12
- unaffected < 4.12
- unaffected 4.14.296 – ≤ 4.14.*
- unaffected 4.19.262 – ≤ 4.19.*
- unaffected 5.4.220 – ≤ 5.4.*
- unaffected 5.10.150 – ≤ 5.10.*
- unaffected 5.15.75 – ≤ 5.15.*
- unaffected 5.19.17 – ≤ 5.19.*
- unaffected 6.0.3 – ≤ 6.0.*
- unaffected 6.1 – ≤ *
References (8)
- https://git.kernel.org/stable/c/3ba3846cb3e2fb3c6fbf79e998472821b298419e (opens in a new tab)
- https://git.kernel.org/stable/c/c7b4641bd2395c2f3cd3b0a0cbf292ed9d489398 (opens in a new tab)
- https://git.kernel.org/stable/c/3575949513ea3b387b30dac1e69468a923c86caf (opens in a new tab)
- https://git.kernel.org/stable/c/b2700f98b3f4dd19fb4315b70581e5caff89eb49 (opens in a new tab)
- https://git.kernel.org/stable/c/c0d73be0af8c1310713bc39a8d7a22e35084e14f (opens in a new tab)
- https://git.kernel.org/stable/c/62006a72b05e0d38727eef5188700f2488be5e89 (opens in a new tab)
- https://git.kernel.org/stable/c/35fb7d4a53d9e36d1b91161ea9870d9c6d57dccf (opens in a new tab)
- https://git.kernel.org/stable/c/1de7c3cf48fc41cd95adb12bd1ea9033a917798a (opens in a new tab)
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)
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[](https://trackcve.app/cve/CVE-2022-50314)Record last updated .