CVE-2021-47248
udp: fix race between close() and udp_abort()
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
In the Linux kernel, the following vulnerability has been resolved:
udp: fix race between close() and udp_abort()
Kaustubh reported and diagnosed a panic in udp_lib_lookup().
The root cause is udp_abort() racing with close(). Both
racing functions acquire the socket lock, but udp{v6}_destroy_sock()
release it before performing destructive actions.
We can't easily extend the socket lock scope to avoid the race,
instead use the SOCK_DEAD flag to prevent udp_abort from doing
any action when the critical race happens.
Diagnosed-and-tested-by: Kaustubh Pandey <kapandey@codeaurora.org>
En el kernel de Linux se ha resuelto la siguiente vulnerabilidad: udp: corrige la ejecución entre close() y udp_abort(). Kaustubh informó y diagnosticó un pánico en udp_lib_lookup(). La causa principal es que udp_abort() compite con close(). Ambas funciones de ejecución adquieren el bloqueo del socket, pero udp{v6}_destroy_sock() lo libera antes de realizar acciones destructivas. No podemos extender fácilmente el alcance del bloqueo del socket para evitar la ejecución; en su lugar, usamos el indicador SOCK_DEAD para evitar que udp_abort realice alguna acción cuando ocurre la ejecución crítica. Diagnosticado y probado por: Kaustubh Pandey
CVSS Scores
SSVC
- Decision:Track
Timeline
- 2024-04-10 CVE Reserved
- 2024-05-21 CVE Published
- 2024-05-22 EPSS Updated
- 2024-08-04 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
CAPEC
References (8)
| URL | Tag | Source |
|---|---|---|
| https://git.kernel.org/stable/c/5d77dca82839ef016a93ad7acd7058b14d967752 | Vuln. Introduced |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
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Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.9 < 4.9.274 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.9 < 4.9.274" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.9 < 4.14.238 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.9 < 4.14.238" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.9 < 4.19.196 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.9 < 4.19.196" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.9 < 5.4.128 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.9 < 5.4.128" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.9 < 5.10.46 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.9 < 5.10.46" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.9 < 5.12.13 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.9 < 5.12.13" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.9 < 5.13 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.9 < 5.13" | en |
Affected
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