https://vulnerability.circl.lu/rss/recent/all/10 Most recent entries from all 2026-09-30T01:01:24.851641+00:00 Vulnerability-Lookup info@circl.lu python-feedgen Contains only the most 10 recent entries. https://vulnerability.circl.lu/vuln/cve-2021-47103 CVE-2021-47103 — inet: fully convert sk->sk_rx_dst to RCU rules 2026-09-30T01:01:28.106339+00:00

Affected: Linux

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

inet: fully convert sk->sk_rx_dst to RCU rules

syzbot reported various issues around early demux, one being included in this changelog [1]

sk->sk_rx_dst is using RCU protection without clearly documenting it.

And following sequences in tcp_v4_do_rcv()/tcp_v6_do_rcv() are not following standard RCU rules.

[a] dst_release(dst); [b] sk->sk_rx_dst = NULL;

They look wrong because a delete operation of RCU protected pointer is supposed to clear the pointer before the call_rcu()/synchronize_rcu() guarding actual memory freeing.

In some cases indeed, dst could be freed before [b] is done.

We could cheat by clearing sk_rx_dst before calling dst_release(), but this seems the right time to stick to standard RCU annotations and debugging facilities.

[1] BUG: KASAN: use-after-free in dst_check include/net/dst.h:470 [inline] BUG: KASAN: use-after-free in tcp_v4_early_demux+0x95b/0x960 net/ipv4/tcp_ipv4.c:1792 Read of size 2 at addr ffff88807f1cb73a by task syz-executor.5/9204

CPU: 0 PID: 9204 Comm: syz-executor.5 Not tainted 5.16.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 print_address_description.constprop.0.cold+0x8d/0x320 mm/kasan/report.c:247 __kasan_report mm/kasan/report.c:433 [inline] kasan_report.cold+0x83/0xdf mm/kasan/r…

 https://vulnerability.circl.lu/vuln/usn-7332-1 USN-7332-1 — linux, linux-aws vulnerabilities 2026-09-30T01:01:28.106504+00:00

Affected: Ubuntu:Pro:14.04:LTS: linux-aws, Ubuntu:Pro:16.04:LTS: linux, Ubuntu:Pro:16.04:LTS: linux-aws

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: - PowerPC architecture; - Block layer subsystem; - GPIO subsystem; - GPU drivers; - Media drivers; - Network drivers; - SCSI subsystem; - Direct Digital Synthesis drivers; - TTY drivers; - 9P distributed file system; - JFS file system; - NILFS2 file system; - File systems infrastructure; - BPF subsystem; - Netfilter; - Network sockets; - Memory management; - Amateur Radio drivers; - B.A.T.M.A.N. meshing protocol; - Bluetooth subsystem; - Ethernet bridge; - Networking core; - IPv4 networking; - IPv6 networking; - Netlink; - TIPC protocol; - Wireless networking; - ALSA framework; (CVE-2022-48994, CVE-2024-43900, CVE-2024-40943, CVE-2024-41063, CVE-2024-42070, CVE-2024-38567, CVE-2024-36964, CVE-2023-52522, CVE-2024-53156, CVE-2024-53104, CVE-2024-43854, CVE-2024-42068, CVE-2023-52818, CVE-2024-44931, CVE-2021-47103, CVE-2023-52799, CVE-2024-43893, CVE-2024-36886, CVE-2024-49902, CVE-2024-36952, CVE-2024-40911, CVE-2023-52488, CVE-2024-35896, CVE-2024-50117, CVE-2024-50171, CVE-2021-47606, CVE-2024-40910, CVE-2024-43892, CVE-2024-50148, CVE-2024-41064, CVE-2024-44938, CVE-2024-50233, CVE-2023-52880, CVE-2024-43863, CVE-2024-26685, CVE-2024-40981)