CVE-2019-20934
published 2020-11-28CVE-2019-20934: An issue was discovered in the Linux kernel before 5.2.6. On NUMA systems, the Linux fair scheduler has a use-after-free in show_numa_stats() because NUMA…
PriorityP423medium5.3CVSS 3.1
AVLACHPRLUINSUCLINAH
EPSS
0.31%
23.7th percentile
An issue was discovered in the Linux kernel before 5.2.6. On NUMA systems, the Linux fair scheduler has a use-after-free in show_numa_stats() because NUMA fault statistics are inappropriately freed, aka CID-16d51a590a8c.
Affected
8 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 5.2.6-1 (bookworm) | linux 5.2.6-1 (bookworm) |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 0 < 5.2.6-1 | 5.2.6-1 |
| linux | linux_kernel | >= 0 < 5.2.6-1 | 5.2.6-1 |
| linux | linux_kernel | >= 0 < 5.2.6-1 | 5.2.6-1 |
| linux | linux_kernel | >= 0 < 5.2.6-1 | 5.2.6-1 |
| linux | linux_kernel | >= 4.19 < 4.19.64 | 4.19.64 |
| linux | linux_kernel | 5.2 – 5.2.17 | — |
CVSS provenance
nvdv3.15.3MEDIUMCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:H
nvdv2.05.4MEDIUMAV:L/AC:M/Au:N/C:P/I:N/A:C
osv5.3MEDIUM
vendor_debian5.3MEDIUM
vendor_redhat5.3MEDIUM
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Red Hat
kernel: use-after-free in show_numa_stats function
vendor_redhat·2020-07-16·CVSS 5.3
CVE-2019-20934 [MEDIUM] CWE-416 kernel: use-after-free in show_numa_stats function
kernel: use-after-free in show_numa_stats function
An issue was discovered in the Linux kernel before 5.2.6. On NUMA systems, the Linux fair scheduler has a use-after-free in show_numa_stats() because NUMA fault statistics are inappropriately freed, aka CID-16d51a590a8c.
A flaw was found in the Linux kernel’s implementation of displaying NUMA statistics, where displaying the scheduler statistics could trigger a use-after-free in show_numa_stats() and display the kernel memory to userspace. The highest threat from this vulnerability is to system availability.
Mitigation: As the NUMA features are built-in and enabled by default, the NUMA functionality can be disabled at boot time by providing the kernel parameter, numa=off.
The method of providing this parameter depends on the operating s
Debian
CVE-2019-20934: linux - An issue was discovered in the Linux kernel before 5.2.6. On NUMA systems, the L...
vendor_debian·2019·CVSS 5.3
CVE-2019-20934 [MEDIUM] CVE-2019-20934: linux - An issue was discovered in the Linux kernel before 5.2.6. On NUMA systems, the L...
An issue was discovered in the Linux kernel before 5.2.6. On NUMA systems, the Linux fair scheduler has a use-after-free in show_numa_stats() because NUMA fault statistics are inappropriately freed, aka CID-16d51a590a8c.
Scope: local
bookworm: resolved (fixed in 5.2.6-1)
bullseye: resolved (fixed in 5.2.6-1)
forky: resolved (fixed in 5.2.6-1)
sid: resolved (fixed in 5.2.6-1)
trixie: resolved (fixed in 5.2.6-1)
GHSA
GHSA-hm82-rjqc-48fq: An issue was discovered in the Linux kernel before 5
ghsa_unreviewed·2022-05-24
CVE-2019-20934 [LOW] CWE-416 GHSA-hm82-rjqc-48fq: An issue was discovered in the Linux kernel before 5
An issue was discovered in the Linux kernel before 5.2.6. On NUMA systems, the Linux fair scheduler has a use-after-free in show_numa_stats() because NUMA fault statistics are inappropriately freed, aka CID-16d51a590a8c.
OSV
CVE-2019-20934: An issue was discovered in the Linux kernel before 5
osv·2020-11-28·CVSS 5.3
CVE-2019-20934 [MEDIUM] CVE-2019-20934: An issue was discovered in the Linux kernel before 5
An issue was discovered in the Linux kernel before 5.2.6. On NUMA systems, the Linux fair scheduler has a use-after-free in show_numa_stats() because NUMA fault statistics are inappropriately freed, aka CID-16d51a590a8c.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
https://bugs.chromium.org/p/project-zero/issues/detail?id=1913https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.2.6https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=16d51a590a8ce3befb1308e0e7ab77f3b661af33https://bugs.chromium.org/p/project-zero/issues/detail?id=1913https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.2.6https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=16d51a590a8ce3befb1308e0e7ab77f3b661af33
2020-11-28
Published