CVE-2021-47248 (GCVE-0-2021-47248)

Vulnerability from cvelistv5 – Published: 2024-05-21 14:19 – Updated: 2025-05-04 07:07
VLAI?
Title
udp: fix race between close() and udp_abort()
Summary
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>
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 5d77dca82839ef016a93ad7acd7058b14d967752 , < e3c36c773aed0fef8b1d3d555b43393ec564400f (git)
Affected: 5d77dca82839ef016a93ad7acd7058b14d967752 , < a0882f68f54f7a8b6308261acee9bd4faab5a69e (git)
Affected: 5d77dca82839ef016a93ad7acd7058b14d967752 , < 2f73448041bd0682d4b552cfd314ace66107f1ad (git)
Affected: 5d77dca82839ef016a93ad7acd7058b14d967752 , < 5a88477c1c85e4baa51e91f2d40f2166235daa56 (git)
Affected: 5d77dca82839ef016a93ad7acd7058b14d967752 , < 8729ec8a2238152a4afc212a331a6cd2c61aeeac (git)
Affected: 5d77dca82839ef016a93ad7acd7058b14d967752 , < 65310b0aff86980a011c7c7bfa487a333d4ca241 (git)
Affected: 5d77dca82839ef016a93ad7acd7058b14d967752 , < a8b897c7bcd47f4147d066e22cc01d1026d7640e (git)
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    Linux Linux Affected: 4.9
Unaffected: 0 , < 4.9 (semver)
Unaffected: 4.9.274 , ≤ 4.9.* (semver)
Unaffected: 4.14.238 , ≤ 4.14.* (semver)
Unaffected: 4.19.196 , ≤ 4.19.* (semver)
Unaffected: 5.4.128 , ≤ 5.4.* (semver)
Unaffected: 5.10.46 , ≤ 5.10.* (semver)
Unaffected: 5.12.13 , ≤ 5.12.* (semver)
Unaffected: 5.13 , ≤ * (original_commit_for_fix)
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Sightings

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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