CVE-2020-29373
published 2020-11-28CVE-2020-29373: An issue was discovered in fs/io_uring.c in the Linux kernel before 5.6. It unsafely handles the root directory during path lookups, and thus a process inside…
PriorityP427medium6.5CVSS 3.1
AVLACLPRLUINSCCHINAN
EPSS
0.51%
40.8th percentile
An issue was discovered in fs/io_uring.c in the Linux kernel before 5.6. It unsafely handles the root directory during path lookups, and thus a process inside a mount namespace can escape to unintended filesystem locations, aka CID-ff002b30181d.
Affected
7 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 5.6.7-1 (bookworm) | linux 5.6.7-1 (bookworm) |
| linux | linux_kernel | < 5.6 | 5.6 |
| linux | linux_kernel | >= 0 < 5.6.7-1 | 5.6.7-1 |
| linux | linux_kernel | >= 0 < 5.6.7-1 | 5.6.7-1 |
| linux | linux_kernel | >= 0 < 5.6.7-1 | 5.6.7-1 |
| linux | linux_kernel | >= 0 < 5.6.7-1 | 5.6.7-1 |
| msrc | cm1_kernel_5.4.91-1_on_cbl_mariner_1.0 | — | — |
CVSS provenance
nvdv3.16.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
nvdv2.02.1LOWAV:L/AC:L/Au:N/C:P/I:N/A:N
osv6.5MEDIUM
vendor_debian6.5MEDIUM
vendor_msrc6.5MEDIUM
vendor_redhat6.5MEDIUM
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Microsoft
An issue was discovered in fs/io_uring.c in the Linux kernel before 5.6. It unsafely handles the root directory during path lookups and thus a process inside a mount namespace can escape to unintended
vendor_msrc·2020-11-10·CVSS 6.5
CVE-2020-29373 [MEDIUM] CWE-22 An issue was discovered in fs/io_uring.c in the Linux kernel before 5.6. It unsafely handles the root directory during path lookups and thus a process inside a mount namespace can escape to unintended
An issue was discovered in fs/io_uring.c in the Linux kernel before 5.6. It unsafely handles the root directory during path lookups and thus a process inside a mount namespace can escape to unintended filesystem locations aka CID-ff002b30181d.
FAQ: Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability?
One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the most recent and most secure versions of the open source libraries with which the distro is composed. Microsoft is committed to transparency in this work which is why we began publishing CSAF/VEX in October 2025. See this blog post for more information. If impact to additional
Red Hat
kernel: Insecure handling of root directory for path lookups via io_uring
vendor_redhat·2020-05-07·CVSS 6.5
CVE-2020-29373 [MEDIUM] CWE-552 kernel: Insecure handling of root directory for path lookups via io_uring
kernel: Insecure handling of root directory for path lookups via io_uring
An issue was discovered in fs/io_uring.c in the Linux kernel before 5.6. It unsafely handles the root directory during path lookups, and thus a process inside a mount namespace can escape to unintended filesystem locations, aka CID-ff002b30181d.
Package: kernel (Red Hat Enterprise Linux 5) - Not affected
Package: kernel (Red Hat Enterprise Linux 6) - Not affected
Package: kernel (Red Hat Enterprise Linux 7) - Not affected
Package: kernel-alt (Red Hat Enterprise Linux 7) - Not affected
Package: kernel-rt (Red Hat Enterprise Linux 7) - Not affected
Package: kernel (Red Hat Enterprise Linux 8) - Not affected
Package: kernel-rt (Red Hat Enterprise Linux 8) - Not affected
Package: kernel (Red Hat Enterprise MRG 2
Debian
CVE-2020-29373: linux - An issue was discovered in fs/io_uring.c in the Linux kernel before 5.6. It unsa...
vendor_debian·2020·CVSS 6.5
CVE-2020-29373 [MEDIUM] CVE-2020-29373: linux - An issue was discovered in fs/io_uring.c in the Linux kernel before 5.6. It unsa...
An issue was discovered in fs/io_uring.c in the Linux kernel before 5.6. It unsafely handles the root directory during path lookups, and thus a process inside a mount namespace can escape to unintended filesystem locations, aka CID-ff002b30181d.
Scope: local
bookworm: resolved (fixed in 5.6.7-1)
bullseye: resolved (fixed in 5.6.7-1)
forky: resolved (fixed in 5.6.7-1)
sid: resolved (fixed in 5.6.7-1)
trixie: resolved (fixed in 5.6.7-1)
GHSA
GHSA-gv63-32vm-56hx: An issue was discovered in fs/io_uring
ghsa_unreviewed·2022-05-24
CVE-2020-29373 [MEDIUM] CWE-22 GHSA-gv63-32vm-56hx: An issue was discovered in fs/io_uring
An issue was discovered in fs/io_uring.c in the Linux kernel before 5.6. It unsafely handles the root directory during path lookups, and thus a process inside a mount namespace can escape to unintended filesystem locations, aka CID-ff002b30181d.
OSV
CVE-2020-29373: An issue was discovered in fs/io_uring
osv·2020-11-28·CVSS 6.5
CVE-2020-29373 [MEDIUM] CVE-2020-29373: An issue was discovered in fs/io_uring
An issue was discovered in fs/io_uring.c in the Linux kernel before 5.6. It unsafely handles the root directory during path lookups, and thus a process inside a mount namespace can escape to unintended filesystem locations, aka CID-ff002b30181d.
No detection rules found.
No public exploits indexed.
https://bugs.chromium.org/p/project-zero/issues/detail?id=2011https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.6https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ff002b30181d30cdfbca316dadd099c3ca0d739chttps://bugs.chromium.org/p/project-zero/issues/detail?id=2011https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.6https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ff002b30181d30cdfbca316dadd099c3ca0d739c
2020-11-28
Published