CVE-2026-53274
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
net/smc: fix sleep-inside-lock in __smc_setsockopt() causing local DoS
In the Linux kernel, the following vulnerability has been resolved: net/smc: fix sleep-inside-lock in __smc_setsockopt() causing local DoS A logic flaw in __smc_setsockopt() allows a local unprivileged user to cause a Denial of Service (DoS) by holding the socket lock indefinitely. The function __smc_setsockopt() calls copy_from_sockptr() while holding lock_sock(sk). By passing a userfaultfd-monitored memory page (or FUSE-backed memory on systems where unprivileged userfaultfd is disabled) as the optval, an attacker can halt execution during the copy operation, keeping the lock held. Combined with asynchronous tear-down operations like shutdown(), this exhausts the kernel wq (kworkers) and triggers the hung task watchdog. [ 240.123456] INFO: task kworker/u8:2 blocked for more than 120 seconds. [ 240.123489] Call Trace: [ 240.123501] smc_shutdown+... [ 240.123512] lock_sock_nested+... This patch moves the user-space copy outside the lock_sock() critical section to prevent the issue.
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) |
|---|---|---|---|---|---|
| a6a6fe27bab48f0d09a64b051e7bde432fcae081 | affected | git | 35a22117839602bb52283de08894c5a7dde92420 | Unavailable | None listed |
| a6a6fe27bab48f0d09a64b051e7bde432fcae081 | affected | git | 5d27d2ffe487df89ce28fda0410eafa05dbe03a0 | Unavailable | None listed |
| a6a6fe27bab48f0d09a64b051e7bde432fcae081 | affected | git | 89f6fbe0033c942cb790ffd53ca93a45eeaf1c91 | Unavailable | None listed |
| a6a6fe27bab48f0d09a64b051e7bde432fcae081 | affected | git | dcd90f42a33e4220385f27b515183d0c91b2fc4a | Unavailable | None listed |
| a6a6fe27bab48f0d09a64b051e7bde432fcae081 | affected | git | 94d286fa5eedc550d42bcb9c85416af8f77736ff | Unavailable | None listed |
| a6a6fe27bab48f0d09a64b051e7bde432fcae081 | affected | git | a3fdd924d88c30b9f488636ce0e4696012cf5511 | 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) |
|---|---|---|---|---|---|
| 5.18 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 5.18 | Unavailable | None listed |
| 6.1.176 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.143 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.94 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.36 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 7.0.13 | unaffected | semver | Unavailable | 7.0.* | None listed |
| 7.1 | unaffected | original_commit_for_fix | Unavailable | * | None listed |