CVE-2026-47328: medium-severity vulnerability in Canonical Ubuntu Linux
Invalid pointer deallocation in Ubuntu Linux AppArmor notification handling
Published
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 6.1epss 0.1%
exploitation probability
0.1%top 98% of all CVEs
observed exploitation
nono source reports it
Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which incorrectly attempt to free a pointer which was not previously kmalloc()d, while at the same time leaking allocated memory. The bug can be triggered by an unprivileged local user and can result in the corruption of slab metadata and could lead to resource exhaustion.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H
Affected products
Canonical · Ubuntu LinuxRelated CVEs — Canonical Ubuntu Linux
In the same product, most dangerous first.
CVE-2026-47331HIGHUse-after-free in Ubuntu Linux AppArmor notification handlingEPSS 0.2%CVE-2026-47333HIGHOut-of-bounds read in Ubuntu Linux AppArmor notification handlingEPSS 0.2%CVE-2025-13350HIGHUse-after-free of orphaned AF_UNIX in Ubuntu builds of Linux kernelEPSS 0.2%CVE-2026-47332MEDIUMOut-of-bounds read in Ubuntu Linux AppArmor notification handlingEPSS 0.1%CVE-2026-47335MEDIUMNULL pointer dereference in Ubuntu Linux AppArmor notification handlingEPSS 0.1%CVE-2026-47326MEDIUMMemory leak in Ubuntu Linux AppArmor large notification response allocationEPSS 0.1%