CVE-2026-98742ALSA: seq: Serialize compat port-info ioctls
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In the Linux kernel, the following vulnerability has been resolved: ALSA: seq: Serialize compat port-info ioctls The native sequencer ioctl path serializes handler calls with client->ioctl_mutex, but the translated port-info compat path invokes the same handlers through snd_seq_kernel_client_ctl() without taking that mutex. This lets concurrent compat CREATE_PORT requests pass the port-count check before any request reaches the serialized insertion. The computed integer port index can then exceed the address field range and wrap to an existing index. Subsequent subscriber teardown can resolve the duplicate address to the wrong port and access a freed subscriber. Take ioctl_mutex while dispatching converted port-info requests, matching the native ioctl path. All translated port-info commands share this helper, so their accesses to the client port state are serialized as well.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 18, 2026
- First seen by InfoSec Signals
- Oct 18, 2026
Affected products
Linux Linux linux:linux (from the name) | from b3defb791b26ea0683a93a4f49c77ec45ec96f10 before 413211dd31cb2ef2fc99fb0aa1a037a97509502c; from b3defb791b26ea0683a93a4f49c77ec45ec96f10 before fc5c52848e405b6efb073db5035bb9ebaed11ec4; from b3defb791b26ea0683a93a4f49c77ec45ec96f10 before 702d92f361f65d9698c473c7599d471395dc4341; from b3defb791b26ea0683a93a4f49c77ec45ec96f10 before 95b2e0361c88753afa030c10698be0a1a5b67650; d6693160906d55ba376bf0b88b7c129762170162; 02cbce8576a31df8fca54aaec91ee081076bd79d; 6aab3aa52366a0051e5abf8aae4616c42053fd8e; f8a38ab4cd9624fc5ac8a7f965c7b20f5b62c03c; and 10 more ranges | CNA record |
References
- https://git.kernel.org/stable/c/413211dd31cb2ef2fc99fb0aa1a037a97509502c
- https://git.kernel.org/stable/c/fc5c52848e405b6efb073db5035bb9ebaed11ec4
- https://git.kernel.org/stable/c/702d92f361f65d9698c473c7599d471395dc4341
- https://git.kernel.org/stable/c/95b2e0361c88753afa030c10698be0a1a5b67650
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.