https://vulnerability.circl.lu/rss/recent/all/10 Most recent entries from all 2026-10-06T21:52:08.771384+00:00 Vulnerability-Lookup info@circl.lu python-feedgen Contains only the most 10 recent entries. https://vulnerability.circl.lu/vuln/cve-2021-46981 CVE-2021-46981 — nbd: Fix NULL pointer in flush_workqueue 2026-10-06T21:52:08.784345+00:00

Affected: Linux

In the Linux kernel, the following vulnerability has been resolved:

nbd: Fix NULL pointer in flush_workqueue

Open /dev/nbdX first, the config_refs will be 1 and the pointers in nbd_device are still null. Disconnect /dev/nbdX, then reference a null recv_workq. The protection by config_refs in nbd_genl_disconnect is useless.

[ 656.366194] BUG: kernel NULL pointer dereference, address: 0000000000000020 [ 656.368943] #PF: supervisor write access in kernel mode [ 656.369844] #PF: error_code(0x0002) - not-present page [ 656.370717] PGD 10cc87067 P4D 10cc87067 PUD 1074b4067 PMD 0 [ 656.371693] Oops: 0002 [#1] SMP [ 656.372242] CPU: 5 PID: 7977 Comm: nbd-client Not tainted 5.11.0-rc5-00040-g76c057c84d28 #1 [ 656.373661] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS ?-20190727_073836-buildvm-ppc64le-16.ppc.fedoraproject.org-3.fc31 04/01/2014 [ 656.375904] RIP: 0010:mutex_lock+0x29/0x60 [ 656.376627] Code: 00 0f 1f 44 00 00 55 48 89 fd 48 83 05 6f d7 fe 08 01 e8 7a c3 ff ff 48 83 05 6a d7 fe 08 01 31 c0 65 48 8b 14 25 00 6d 01 00 <f0> 48 0f b1 55 d [ 656.378934] RSP: 0018:ffffc900005eb9b0 EFLAGS: 00010246 [ 656.379350] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 656.379915] RDX: ffff888104cf2600 RSI: ffffffffaae8f452 RDI: 0000000000000020 [ 656.380473] RBP: 0000000000000020 R08: 0000000000000000 R09: ffff88813bd6b318 [ 656.381039] R10: 00000000000000c7 R11: fefefefefefefeff R12: ffff888102710b40 [ 656.381599] R13: ffffc900005eb9e…

 https://vulnerability.circl.lu/vuln/usn-6777-1 USN-6777-1 — linux, linux-aws, linux-azure-4.15, linux-gcp-4.15, linux-hwe, linux-kvm, linux-oracle vulnerabilities 2026-10-06T21:52:08.784447+00:00

Affected: Ubuntu:Pro:16.04:LTS: linux-hwe, Ubuntu:Pro:16.04:LTS: linux-oracle, Ubuntu:Pro:18.04:LTS: linux, Ubuntu:Pro:18.04:LTS: linux-aws, Ubuntu:Pro:18.04:LTS: linux-azure-4.15, Ubuntu:Pro:18.04:LTS: linux-gcp-4.15, Ubuntu:Pro:18.04:LTS: linux-kvm, Ubuntu:Pro:18.04:LTS: linux-oracle

Zheng Wang discovered that the Broadcom FullMAC WLAN driver in the Linux kernel contained a race condition during device removal, leading to a use- after-free vulnerability. A physically proximate attacker could possibly use this to cause a denial of service (system crash). (CVE-2023-47233)

Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems: - Block layer subsystem; - Userspace I/O drivers; - Ceph distributed file system; - Ext4 file system; - JFS file system; - NILFS2 file system; - Bluetooth subsystem; - Networking core; - IPv4 networking; - IPv6 networking; - Logical Link layer; - MAC80211 subsystem; - Netlink; - NFC subsystem; - Tomoyo security module; (CVE-2023-52524, CVE-2023-52530, CVE-2023-52601, CVE-2023-52439, CVE-2024-26635, CVE-2023-52602, CVE-2024-26614, CVE-2024-26704, CVE-2023-52604, CVE-2023-52566, CVE-2021-46981, CVE-2024-26622, CVE-2024-26735, CVE-2024-26805, CVE-2024-26801, CVE-2023-52583)