CVE-2021-29266
published 2021-03-26CVE-2021-29266: An issue was discovered in the Linux kernel before 5.11.9. drivers/vhost/vdpa.c has a use-after-free because v->config_ctx has an invalid value upon re-opening…
PriorityP337high7.8CVSS 3.1
AVLACLPRLUINSUCHIHAH
EPSS
0.32%
24.2th percentile
An issue was discovered in the Linux kernel before 5.11.9. drivers/vhost/vdpa.c has a use-after-free because v->config_ctx has an invalid value upon re-opening a character device, aka CID-f6bbf0010ba0.
Affected
8 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 5.10.26-1 (bookworm) | linux 5.10.26-1 (bookworm) |
| linux | linux_kernel | >= 0 < 5.10.26-1 | 5.10.26-1 |
| linux | linux_kernel | >= 0 < 5.10.26-1 | 5.10.26-1 |
| linux | linux_kernel | >= 0 < 5.10.26-1 | 5.10.26-1 |
| linux | linux_kernel | >= 0 < 5.10.26-1 | 5.10.26-1 |
| linux | linux_kernel | >= 5.11 < 5.11.9 | 5.11.9 |
| linux | linux_kernel | >= 5.8 < 5.10.26 | 5.10.26 |
| msrc | cbl2_kernel_5.10.78.1-1_on_cbl_mariner_2.0 | — | — |
CVSS provenance
nvdv3.17.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
nvdv2.07.2HIGHAV:L/AC:L/Au:N/C:C/I:C/A:C
osv7.8HIGH
vendor_debian7.8LOW
vendor_msrc7.8HIGH
vendor_redhat7.8HIGH
vendor_ubuntu7.8HIGH
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
GHSA
GHSA-cq8m-c9w9-pc58: An issue was discovered in the Linux kernel before 5
ghsa_unreviewed·2022-05-24
CVE-2021-29266 [HIGH] CWE-416 GHSA-cq8m-c9w9-pc58: An issue was discovered in the Linux kernel before 5
An issue was discovered in the Linux kernel before 5.11.9. drivers/vhost/vdpa.c has a use-after-free because v->config_ctx has an invalid value upon re-opening a character device, aka CID-f6bbf0010ba0.
OSV
linux, linux-aws, linux-azure, linux-gcp, linux-hwe-5.8, linux-kvm, linux-oracle, linux-raspi vulnerabilities
osv·2021-05-11·CVSS 4.4
CVE-2021-3489 [MEDIUM] linux, linux-aws, linux-azure, linux-gcp, linux-hwe-5.8, linux-kvm, linux-oracle, linux-raspi vulnerabilities
linux, linux-aws, linux-azure, linux-gcp, linux-hwe-5.8, linux-kvm, linux-oracle, linux-raspi vulnerabilities
Ryota Shiga discovered that the eBPF implementation in the Linux kernel did
not properly verify that a BPF program only reserved as much memory for a
ring buffer as was allocated. A local attacker could use this to cause a
denial of service (system crash) or execute arbitrary code. (CVE-2021-3489)
Manfred Paul discovered that the eBPF implementation in the Linux kernel
did not properly track bounds on bitwise operations. A local attacker could
use this to cause a denial of service (system crash) or execute arbitrary
code. (CVE-2021-3490)
Billy Jheng Bing-Jhong discovered that the io_uring implementation of the
Linux kernel did not properly enforce the MAX_RW_COUNT limit in some
OSV
linux-oem-5.10 vulnerabilities
osv·2021-05-11·CVSS 7.8
CVE-2021-3489 [HIGH] linux-oem-5.10 vulnerabilities
linux-oem-5.10 vulnerabilities
Ryota Shiga discovered that the eBPF implementation in the Linux kernel did
not properly verify that a BPF program only reserved as much memory for a
ring buffer as was allocated. A local attacker could use this to cause a
denial of service (system crash) or execute arbitrary code. (CVE-2021-3489)
Manfred Paul discovered that the eBPF implementation in the Linux kernel
did not properly track bounds on bitwise operations. A local attacker could
use this to cause a denial of service (system crash) or execute arbitrary
code. (CVE-2021-3490)
Billy Jheng Bing-Jhong discovered that the io_uring implementation of the
Linux kernel did not properly enforce the MAX_RW_COUNT limit in some
situations. A local attacker could use this to cause a denial of service
(syste
OSV
CVE-2021-29266: An issue was discovered in the Linux kernel before 5
osv·2021-03-26·CVSS 7.8
CVE-2021-29266 [HIGH] CVE-2021-29266: An issue was discovered in the Linux kernel before 5
An issue was discovered in the Linux kernel before 5.11.9. drivers/vhost/vdpa.c has a use-after-free because v->config_ctx has an invalid value upon re-opening a character device, aka CID-f6bbf0010ba0.
Ubuntu
Linux kernel (OEM) vulnerabilities
vendor_ubuntu·2021-05-11·CVSS 7.8
CVE-2021-3489 [HIGH] Linux kernel (OEM) vulnerabilities
Title: Linux kernel (OEM) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Ryota Shiga discovered that the eBPF implementation in the Linux kernel did
not properly verify that a BPF program only reserved as much memory for a
ring buffer as was allocated. A local attacker could use this to cause a
denial of service (system crash) or execute arbitrary code. (CVE-2021-3489)
Manfred Paul discovered that the eBPF implementation in the Linux kernel
did not properly track bounds on bitwise operations. A local attacker could
use this to cause a denial of service (system crash) or execute arbitrary
code. (CVE-2021-3490)
Billy Jheng Bing-Jhong discovered that the io_uring implementation of the
Linux kernel did not properly enforce the MAX_RW_COUNT limit in some
si
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2021-05-11·CVSS 4.4
CVE-2021-29265 [MEDIUM] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Ryota Shiga discovered that the eBPF implementation in the Linux kernel did
not properly verify that a BPF program only reserved as much memory for a
ring buffer as was allocated. A local attacker could use this to cause a
denial of service (system crash) or execute arbitrary code. (CVE-2021-3489)
Manfred Paul discovered that the eBPF implementation in the Linux kernel
did not properly track bounds on bitwise operations. A local attacker could
use this to cause a denial of service (system crash) or execute arbitrary
code. (CVE-2021-3490)
Billy Jheng Bing-Jhong discovered that the io_uring implementation of the
Linux kernel did not properly enforce the MAX_RW_COUNT limit in some
situatio
Red Hat
kernel: use-after-free in drivers/vhost/vdpa.c because v->config_ctx has an invalid value upon re-opening a character device
vendor_redhat·2021-03-14·CVSS 7.8
CVE-2021-29266 [HIGH] CWE-416 kernel: use-after-free in drivers/vhost/vdpa.c because v->config_ctx has an invalid value upon re-opening a character device
kernel: use-after-free in drivers/vhost/vdpa.c because v->config_ctx has an invalid value upon re-opening a character device
An issue was discovered in the Linux kernel before 5.11.9. drivers/vhost/vdpa.c has a use-after-free because v->config_ctx has an invalid value upon re-opening a character device, aka CID-f6bbf0010ba0.
A flaw was found in the Linux kernel. An invalid value upon reopening a character device can cause a use-after-free memory corruption. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
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 Ente
Microsoft
An issue was discovered in the Linux kernel before 5.11.9. drivers/vhost/vdpa.c has a use-after-free because v->config_ctx has an invalid value upon re-opening a character device aka CID-f6bbf0010ba0.
vendor_msrc·2021-03-09·CVSS 7.8
CVE-2021-29266 [HIGH] CWE-416 An issue was discovered in the Linux kernel before 5.11.9. drivers/vhost/vdpa.c has a use-after-free because v->config_ctx has an invalid value upon re-opening a character device aka CID-f6bbf0010ba0.
An issue was discovered in the Linux kernel before 5.11.9. drivers/vhost/vdpa.c has a use-after-free because v->config_ctx has an invalid value upon re-opening a character device aka CID-f6bbf0010ba0.
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 products is identified, we will update the
Debian
CVE-2021-29266: linux - An issue was discovered in the Linux kernel before 5.11.9. drivers/vhost/vdpa.c ...
vendor_debian·2021·CVSS 7.8
CVE-2021-29266 [HIGH] CVE-2021-29266: linux - An issue was discovered in the Linux kernel before 5.11.9. drivers/vhost/vdpa.c ...
An issue was discovered in the Linux kernel before 5.11.9. drivers/vhost/vdpa.c has a use-after-free because v->config_ctx has an invalid value upon re-opening a character device, aka CID-f6bbf0010ba0.
Scope: local
bookworm: resolved (fixed in 5.10.26-1)
bullseye: resolved (fixed in 5.10.26-1)
forky: resolved (fixed in 5.10.26-1)
sid: resolved (fixed in 5.10.26-1)
trixie: resolved (fixed in 5.10.26-1)
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.9https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=f6bbf0010ba004f5e90c7aefdebc0ee4bd3283b9https://security.netapp.com/advisory/ntap-20210513-0005/https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.9https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=f6bbf0010ba004f5e90c7aefdebc0ee4bd3283b9https://security.netapp.com/advisory/ntap-20210513-0005/
2021-03-26
Published