Summary
Stonejiajia, Shir Tamari and Sagi Tzadik discovered that the OverlayFS
implementation in the Ubuntu Linux kernel did not properly perform
permission checks in certain situations. A local attacker could possibly
use this to gain elevated privileges. (CVE-2023-2640)
Shir Tamari and Sagi Tzadik discovered that the OverlayFS implementation in
the Ubuntu Linux kernel did not properly perform permission checks in
certain situations. A local attacker could possibly use this to gain
elevated privileges. (CVE-2023-32629)
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:
- Network drivers;
- NVME drivers;
- SMB network file system;
- Netfilter;
- io_uring subsystem;
(CVE-2024-35862, CVE-2024-50060, CVE-2026-23112, CVE-2026-23273,
CVE-2026-23274, CVE-2026-23351)
Fixed packages 1
| Release | Package | Fixed in |
|---|---|---|
| Ubuntu · Pro 20.04 LTS Pro:20.04:LTS | linux-oracle-5.15 | 5.15.0-1104.110~20.04.1 |
Vulnerabilities 8
-
Critical 9.8
smb: client: fix potential UAF in smb2_is_network_name_deleted()
In the Linux kernel, the following vulnerability has been resolved: smb: client: fix potential UAF in smb2_is_network_name_deleted() Skip sessions that are being teared down (status == SES_EXITING) to avoid UAF.
-
Critical 9.8
nvmet-tcp: add bounds checks in nvmet_tcp_build_pdu_iovec
In the Linux kernel, the following vulnerability has been resolved: nvmet-tcp: add bounds checks in nvmet_tcp_build_pdu_iovec nvmet_tcp_build_pdu_iovec() could walk past cmd->req.sg when a PDU length or offset exceeds sg_cnt and then use bogus sg->length/offs…
-
High 7.8
On Ubuntu kernels carrying both c914c0e27eb0 and "UBUNTU: SAUCE: overlayfs: Skip permission checking for trusted.overla…
-
High 7.8CVE-2023-32629 Public exploit
Local privilege escalation vulnerability in Ubuntu Kernels overlayfs ovl_copy_up_meta_inode_data skip permission checks…
-
High 7.8
macvlan: observe an RCU grace period in macvlan_common_newlink() error path
In the Linux kernel, the following vulnerability has been resolved: macvlan: observe an RCU grace period in macvlan_common_newlink() error path valis reported that a race condition still happens after my prior patch. macvlan_common_newlink() might have made @…
-
High 7.8
netfilter: xt_IDLETIMER: reject rev0 reuse of ALARM timer labels
In the Linux kernel, the following vulnerability has been resolved: netfilter: xt_IDLETIMER: reject rev0 reuse of ALARM timer labels IDLETIMER revision 0 rules reuse existing timers by label and always call mod_timer() on timer->timer. If the label was create…
-
High 7.8
netfilter: nft_set_pipapo: split gc into unlink and reclaim phase
In the Linux kernel, the following vulnerability has been resolved: netfilter: nft_set_pipapo: split gc into unlink and reclaim phase Yiming Qian reports Use-after-free in the pipapo set type: Under a large number of expired elements, commit-time GC can run f…
-
Unscored —
io_uring: check if we need to reschedule during overflow flush
In the Linux kernel, the following vulnerability has been resolved: io_uring: check if we need to reschedule during overflow flush In terms of normal application usage, this list will always be empty. And if an application does overflow a bit, it'll have a fe…
References
-
report
https://ubuntu.com/security/CVE-2023-2640
-
report
https://ubuntu.com/security/CVE-2023-32629
-
report
https://ubuntu.com/security/CVE-2024-35862
-
report
https://ubuntu.com/security/CVE-2024-50060
-
report
https://ubuntu.com/security/CVE-2026-23112
-
report
https://ubuntu.com/security/CVE-2026-23273
-
report
https://ubuntu.com/security/CVE-2026-23274
-
report
https://ubuntu.com/security/CVE-2026-23351