CVE-2021-47248
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2021
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
udp: fix race between close() and udp_abort()
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>
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 5d77dca82839ef016a93ad7acd7058b14d967752 | affected | git | e3c36c773aed0fef8b1d3d555b43393ec564400f | Unavailable | None listed |
| 5d77dca82839ef016a93ad7acd7058b14d967752 | affected | git | a0882f68f54f7a8b6308261acee9bd4faab5a69e | Unavailable | None listed |
| 5d77dca82839ef016a93ad7acd7058b14d967752 | affected | git | 2f73448041bd0682d4b552cfd314ace66107f1ad | Unavailable | None listed |
| 5d77dca82839ef016a93ad7acd7058b14d967752 | affected | git | 5a88477c1c85e4baa51e91f2d40f2166235daa56 | Unavailable | None listed |
| 5d77dca82839ef016a93ad7acd7058b14d967752 | affected | git | 8729ec8a2238152a4afc212a331a6cd2c61aeeac | Unavailable | None listed |
| 5d77dca82839ef016a93ad7acd7058b14d967752 | affected | git | 65310b0aff86980a011c7c7bfa487a333d4ca241 | Unavailable | None listed |
| 5d77dca82839ef016a93ad7acd7058b14d967752 | affected | git | a8b897c7bcd47f4147d066e22cc01d1026d7640e | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 4.9 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 4.9 | Unavailable | None listed |
| 4.9.274 | unaffected | semver | Unavailable | 4.9.* | None listed |
| 4.14.238 | unaffected | semver | Unavailable | 4.14.* | None listed |
| 4.19.196 | unaffected | semver | Unavailable | 4.19.* | None listed |
| 5.4.128 | unaffected | semver | Unavailable | 5.4.* | None listed |
| 5.10.46 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.12.13 | unaffected | semver | Unavailable | 5.12.* | None listed |
| 5.13 | unaffected | original_commit_for_fix | Unavailable | * | None listed |