CVE-2024-36937
published 2024-05-30CVE-2024-36937: In the Linux kernel, the following vulnerability has been resolved: xdp: use flags field to disambiguate broadcast redirect When redirecting a packet using…
PriorityP419medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.22%
13.2th percentile
In the Linux kernel, the following vulnerability has been resolved:
xdp: use flags field to disambiguate broadcast redirect
When redirecting a packet using XDP, the bpf_redirect_map() helper will set
up the redirect destination information in struct bpf_redirect_info (using
the __bpf_xdp_redirect_map() helper function), and the xdp_do_redirect()
function will read this information after the XDP program returns and pass
the frame on to the right redirect destination.
When using the BPF_F_BROADCAST flag to do multicast redirect to a whole
map, __bpf_xdp_redirect_map() sets the 'map' pointer in struct
bpf_redirect_info to point to the destination map to be broadcast. And
xdp_do_redirect() reacts to the value of this map pointer to decide whether
it's dealing with a broadcast or a single-value redirect. However, if the
destination map is being destroyed before xdp_do_redirect() is called, the
map pointer will be cleared out (by bpf_clear_redirect_map()) without
waiting for any XDP programs to stop running. This causes xdp_do_redirect()
to think that the redirect was to a single target, but the target pointer
is also NULL (since broadcast redirects don't have a single target), so
this causes a crash when a NULL pointer is passed to dev_map_enqueue().
To fix this, change xdp_do_redirect() to react directly to the presence of
the BPF_F_BROADCAST flag in the 'flags' value in struct bpf_redirect_info
to disambiguate between a single-target and a broadcast redirect. And only
read the 'map' pointer if the broadcast flag is set, aborting if that has
been cleared out in the meantime. This prevents the crash, while keeping
the atomic (cmpxchg-based) clearing of the map pointer itself, and without
adding any more checks in the non-broadcast fast path.
Affected
17 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 6.1.94-1 (bookworm) | linux 6.1.94-1 (bookworm) |
| linux | linux | — | — |
| linux | linux | >= e624d4ed4aa8cc3c69d1359b0aaea539203ed266 < 12481f30128fbebc2eeb55eb2d56390fdfa30c5e | 12481f30128fbebc2eeb55eb2d56390fdfa30c5e |
| linux | linux | >= e624d4ed4aa8cc3c69d1359b0aaea539203ed266 < 272bfb019f3cc018f654b992115774e77b4f3ffc | 272bfb019f3cc018f654b992115774e77b4f3ffc |
| linux | linux | >= e624d4ed4aa8cc3c69d1359b0aaea539203ed266 < e22e25820fa04ea5eaac4ef7ee200e9923f466a4 | e22e25820fa04ea5eaac4ef7ee200e9923f466a4 |
| linux | linux | >= e624d4ed4aa8cc3c69d1359b0aaea539203ed266 < 6fd81f9d333e7b3532036577b1beb74ba1323553 | 6fd81f9d333e7b3532036577b1beb74ba1323553 |
| linux | linux | >= e624d4ed4aa8cc3c69d1359b0aaea539203ed266 < 5bcf0dcbf9066348058b88a510c57f70f384c92c | 5bcf0dcbf9066348058b88a510c57f70f384c92c |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 0 < 6.1.94-1 | 6.1.94-1 |
| linux | linux_kernel | >= 0 < 6.8.11-1 | 6.8.11-1 |
| linux | linux_kernel | >= 0 < 6.8.11-1 | 6.8.11-1 |
| linux | linux_kernel | >= 0 < 5.15.0-118.128 | 5.15.0-118.128 |
| linux | linux_kernel | >= 0 < 6.8.0-40.40 | 6.8.0-40.40 |
| linux | linux_kernel | >= 5.14 < 5.15.159 | 5.15.159 |
| linux | linux_kernel | >= 5.16 < 6.1.91 | 6.1.91 |
| linux | linux_kernel | >= 6.2 < 6.6.31 | 6.6.31 |
| linux | linux_kernel | >= 6.7 < 6.8.10 | 6.8.10 |
CVSS provenance
nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv6.5MEDIUM
vendor_ubuntu6.5MEDIUM
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
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CVE-2024-36937 [MEDIUM] CVE-2024-36937: In the Linux kernel, the following vulnerability has been resolved: xdp: use flags field to disambiguate broadcast redirect When redirecting a packet
In the Linux kernel, the following vulnerability has been resolved: xdp: use flags field to disambiguate broadcast redirect When redirecting a packet using XDP, the bpf_redirect_map() helper will set up the redirect destination information in struct bpf_redirect_info (using the __bpf_xdp_redirect_map() helper function), and the xdp_do_redirect() function will read this information after the XDP program returns and pass the frame on to the right redirect destination. When using the BPF_F_BROADCAST flag to do multicast redirect to a whole map, __bpf_xdp_redirect_map() sets the 'map' pointer in struct bpf_redirect_info to point to the destination map to be broadcast. And xdp_do_redirect() reacts to the value of this map pointer to decide whether it's dealing with a broadcast or a single-value
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interrupts and compromise the security guarantees of AMD SEV-SNP. This flaw
is known as WeSee. A local attacker in control of the hypervisor could use
this to expose sensitive information or possibly execute arbitrary code in
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An attacker could possibly use these to compromise the system.
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- Bluetooth drivers;
- Clock framework and drivers;
- FireWire subsystem;
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- Multiple devices driver;
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Summary: Several security issues were fixed in the Linux kernel.
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An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM32 architecture;
- ARM64 architecture;
- M68K architecture;
- OpenRISC architecture;
- PowerPC architecture;
- RISC-V architecture;
- x86 architecture;
- Block layer subsystem;
- Accessibility subsystem;
- Bluetooth drivers;
- Clock framework and drivers;
- CPU frequency scaling framework;
- Hardware crypto device drivers;
- DMA engine subsystem;
- DPLL subsystem;
- FireWire subsystem;
- EFI core;
- Qualcomm firmware drivers;
- GPIO subsystem;
- GPU drivers;
- Microsoft Hyper-V drivers;
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discovered that an untrusted hypervisor could inject malicious #VC
interrupts and compromise the security guarantees of AMD SEV-SNP. This flaw
is known as WeSee. A local attacker in control of the hypervisor could use
this to expose sensitive information or possibly execute arbitrary code in
the trusted execution environment. (CVE-2024-25742)
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM32 architecture;
- ARM64 architecture;
- Block layer subsystem;
- Bluetooth drivers;
-
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- ARM64 architecture;
- M68K architecture;
- OpenRISC architecture;
- PowerPC architecture;
- RISC-V architecture;
- x86 architecture;
- Block layer subsystem;
- Accessibility subsystem;
- Bluetooth drivers;
- Clock framework and drivers;
- CPU frequency scaling framework;
- Hardware crypto device drivers;
- DMA engine subsystem;
- DPLL subsystem;
- FireWire subsystem;
- EFI core;
- Qualcomm firmware drivers;
- GPIO subsystem;
- GPU drivers;
- Microsoft Hyper-V drivers;
- InfiniBand d
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Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Benedict Schlüter, Supraja Sridhara, Andrin Bertschi, and Shweta Shinde
discovered that an untrusted hypervisor could inject malicious #VC
interrupts and compromise the security guarantees of AMD SEV-SNP. This flaw
is known as WeSee. A local attacker in control of the hypervisor could use
this to expose sensitive information or possibly execute arbitrary code in
the trusted execution environment. (CVE-2024-25742)
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM32 architecture;
- ARM64 architecture;
- M68K architecture;
- OpenRISC architecture;
- PowerPC
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CVE-2024-36952 Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM32 architecture;
- ARM64 architecture;
- M68K architecture;
- OpenRISC architecture;
- PowerPC architecture;
- RISC-V architecture;
- x86 architecture;
- Block layer subsystem;
- Accessibility subsystem;
- Bluetooth drivers;
- Clock framework and drivers;
- CPU frequency scaling framework;
- Hardware crypto device drivers;
- DMA engine subsystem;
- DPLL subsystem;
- FireWire subsystem;
- EFI core;
- Qualcomm firmware drivers;
- GPIO subsystem;
- GPU drivers;
- Microsoft Hyper-V drivers;
- InfiniBand drivers
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vendor_ubuntu·2024-08-08·CVSS 5.5
CVE-2024-36937 [MEDIUM] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM32 architecture;
- ARM64 architecture;
- Block layer subsystem;
- Bluetooth drivers;
- Clock framework and drivers;
- FireWire subsystem;
- GPU drivers;
- InfiniBand drivers;
- Multiple devices driver;
- EEPROM drivers;
- Network drivers;
- Pin controllers subsystem;
- Remote Processor subsystem;
- S/390 drivers;
- SCSI drivers;
- 9P distributed file system;
- Network file system client;
- SMB network file system;
- Socket messages infrastructure;
- Dynamic debug library;
- Bluetooth subsystem;
- Networking
Red Hat
kernel: xdp: use flags field to disambiguate broadcast redirect
vendor_redhat·2024-05-30·CVSS 5.5
CVE-2024-36937 [MEDIUM] CWE-476 kernel: xdp: use flags field to disambiguate broadcast redirect
kernel: xdp: use flags field to disambiguate broadcast redirect
In the Linux kernel, the following vulnerability has been resolved:
xdp: use flags field to disambiguate broadcast redirect
When redirecting a packet using XDP, the bpf_redirect_map() helper will set
up the redirect destination information in struct bpf_redirect_info (using
the __bpf_xdp_redirect_map() helper function), and the xdp_do_redirect()
function will read this information after the XDP program returns and pass
the frame on to the right redirect destination.
When using the BPF_F_BROADCAST flag to do multicast redirect to a whole
map, __bpf_xdp_redirect_map() sets the 'map' pointer in struct
bpf_redirect_info to point to the destination map to be broadcast. And
xdp_do_redirect() reacts to the value of this map pointer
Debian
CVE-2024-36937: linux - In the Linux kernel, the following vulnerability has been resolved: xdp: use fl...
vendor_debian·2024·CVSS 5.5
CVE-2024-36937 [MEDIUM] CVE-2024-36937: linux - In the Linux kernel, the following vulnerability has been resolved: xdp: use fl...
In the Linux kernel, the following vulnerability has been resolved: xdp: use flags field to disambiguate broadcast redirect When redirecting a packet using XDP, the bpf_redirect_map() helper will set up the redirect destination information in struct bpf_redirect_info (using the __bpf_xdp_redirect_map() helper function), and the xdp_do_redirect() function will read this information after the XDP program returns and pass the frame on to the right redirect destination. When using the BPF_F_BROADCAST flag to do multicast redirect to a whole map, __bpf_xdp_redirect_map() sets the 'map' pointer in struct bpf_redirect_info to point to the destination map to be broadcast. And xdp_do_redirect() reacts to the value of this map pointer to decide whether it's dealing with a broadcast or a single-value
No detection rules found.
No public exploits indexed.
https://git.kernel.org/stable/c/12481f30128fbebc2eeb55eb2d56390fdfa30c5ehttps://git.kernel.org/stable/c/272bfb019f3cc018f654b992115774e77b4f3ffchttps://git.kernel.org/stable/c/5bcf0dcbf9066348058b88a510c57f70f384c92chttps://git.kernel.org/stable/c/6fd81f9d333e7b3532036577b1beb74ba1323553https://git.kernel.org/stable/c/e22e25820fa04ea5eaac4ef7ee200e9923f466a4https://git.kernel.org/stable/c/12481f30128fbebc2eeb55eb2d56390fdfa30c5ehttps://git.kernel.org/stable/c/272bfb019f3cc018f654b992115774e77b4f3ffchttps://git.kernel.org/stable/c/5bcf0dcbf9066348058b88a510c57f70f384c92chttps://git.kernel.org/stable/c/6fd81f9d333e7b3532036577b1beb74ba1323553https://git.kernel.org/stable/c/e22e25820fa04ea5eaac4ef7ee200e9923f466a4
2024-05-30
Published