nilfs2: fix potential UAF of struct nilfs_sc_info in nilfs_segctor_thread()
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-416 and the CVSS impact.
Summary
In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix potential UAF of struct nilfs_sc_info in nilfs_segctor_thread() The finalization of nilfs_segctor_thread() can race with nilfs_segctor_kill_thread() which terminates that thread, potentially causing a use-after-free BUG as KASAN detected. At the end of nilfs_segctor_thread(), it assigns NULL to "sc_task" member of "struct nilfs_sc_info" to indicate the thread has finished, and then notifies nilfs_segctor_kill_thread() of this using waitqueue "sc_wait_task" on the struct nilfs_sc_info. However, here, immediately after the NULL assignment to "sc_task", it is possible that nilfs_segctor_kill_thread() will detect it and return to continue the deallocation, freeing the nilfs_sc_info structure before the thread does the notification. This fixes the issue by protecting the NULL assignment to "sc_task" and its notification, with spinlock "sc_state_lock" of the struct nilfs_sc_info. Since nilfs_segctor_kill_thread() does a final check to see if "sc_task" is NULL with "sc_state_lock" locked, this can eliminate the race.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 2.6.30 and later | 4.14.313, 4.19.281, 5.4.241, 5.10.178, 5.15.107, 6.1.24, 6.2.11, 6.3 | Patch available | CNA |
- Linux VendorLinux Affected 2.6.30 and later Fixed in 4.14.313, 4.19.281, 5.4.241, 5.10.178, 5.15.107, 6.1.24, 6.2.11, 6.3 Patch available CNA
CPE configurations NVD · 6
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 2.6.30 to before 4.14.313; 4.15 to before 4.19.281; 4.20 to before 5.4.241; 5.5 to before 5.10.178; 5.11 to before 5.15.107; 5.16 to before 6.1.24; 6.2 to before 6.2.11 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.3:rc1:*:*:*:*:*:* | 6.3 rc1 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.3:rc2:*:*:*:*:*:* | 6.3 rc2 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.3:rc3:*:*:*:*:*:* | 6.3 rc3 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.3:rc4:*:*:*:*:*:* | 6.3 rc4 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.3:rc5:*:*:*:*:*:* | 6.3 rc5 | Vulnerable | Linux |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 2.6.30 to before 4.14.313; 4.15 to before 4.19.281; 4.20 to before 5.4.241; 5.5 to before 5.10.178; 5.11 to before 5.15.107; 5.16 to before 6.1.24; 6.2 to before 6.2.11 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.3:rc1:*:*:*:*:*:* Versions 6.3 rc1 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.3:rc2:*:*:*:*:*:* Versions 6.3 rc2 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.3:rc3:*:*:*:*:*:* Versions 6.3 rc3 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.3:rc4:*:*:*:*:*:* Versions 6.3 rc4 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.3:rc5:*:*:*:*:*:* Versions 6.3 rc5 Vulnerable ·Linux
Remediation
- Fix · CNA Linux (Linux) Fixed in 4.14.313, 4.19.281, 5.4.241, 5.10.178, 5.15.107, 6.1.24, 6.2.11, 6.3
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
Not affected: 5 products
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
Timeline
- 2026-10-02 Threatist record created from CVE-2023-53608
- 2026-10-03 Alias added: GHSA-g3qq-fg79-63v4
- 2026-11-07 Affected versions changed · Red Hat
References
Patch 8
- https://git.kernel.org/stable/c/034cce77d52ba013ce62b4f5258c29907eb1ada5
- https://git.kernel.org/stable/c/0dbf0e64b91ee8fcb278aea93eb06fc7d56ecbcc
- https://git.kernel.org/stable/c/613bf23c070d11c525268f2945aa594704a9b764
- https://git.kernel.org/stable/c/f32297dba338dc06d62286dedb3cdbd5175b1719
- https://git.kernel.org/stable/c/92684e02654c91a61a0b0561433b710bcece19fe
- https://git.kernel.org/stable/c/bae009a2f1b7c2011d2e92d8c84868d315c0b97e
- https://git.kernel.org/stable/c/b4d80bd6370b81a1725b6b8f7894802c23a14e9f
- https://git.kernel.org/stable/c/6be49d100c22ffea3287a4b19d7639d259888e33
More Linux Kernel vulnerabilities
- TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
- TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
- TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
- TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
- TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
- TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
Sources
- CVE-2023-53608 · CVE Program
- CVE-2023-53608 · NVD
- FIRST EPSS
- GHSA-g3qq-fg79-63v4 · GitHub Advisory Database · CC BY 4.0
- CVE-2023-53608 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences