ubi: ubi_wl_put_peb: Fix infinite loop when wear-leveling work failed
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Partial Red Hat: 4 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-835.
Summary
In the Linux kernel, the following vulnerability has been resolved: ubi: ubi_wl_put_peb: Fix infinite loop when wear-leveling work failed Following process will trigger an infinite loop in ubi_wl_put_peb(): ubifs_bgt ubi_bgt ubifs_leb_unmap ubi_leb_unmap ubi_eba_unmap_leb ubi_wl_put_peb wear_leveling_worker e1 = rb_entry(rb_first(&ubi->used) e2 = get_peb_for_wl(ubi) ubi_io_read_vid_hdr // return err (flash fault) out_error: ubi->move_from = ubi->move_to = NULL wl_entry_destroy(ubi, e1) ubi->lookuptbl[e->pnum] = NULL retry: e = ubi->lookuptbl[pnum]; // return NULL if (e == ubi->move_from) { // NULL == NULL gets true goto retry; // infinite loop !!! $ top PID USER PR NI VIRT RES SHR S %CPU %MEM COMMAND 7676 root 20 0 0 0 0 R 100.0 0.0 ubifs_bgt0_0 Fix it by: 1) Letting ubi_wl_put_peb() returns directly if wearl leveling entry has been removed from 'ubi->lookuptbl'. 2) Using 'ubi->wl_lock' protecting wl entry deletion to preventing an use-after-free problem for wl entry in ubi_wl_put_peb(). Fetch a reproducer in [Link].
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 2.6.25 and later | 4.14.308, 4.19.276, 5.4.235, 5.10.173, 5.15.100, 6.1.18, 6.2.5, 6.3 | Patch available | CNA |
- Linux VendorLinux Affected 2.6.25 and later Fixed in 4.14.308, 4.19.276, 5.4.235, 5.10.173, 5.15.100, 6.1.18, 6.2.5, 6.3 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 2.6.25 to before 4.14.308; 4.15 to before 4.19.276; 4.20 to before 5.4.235; 5.5 to before 5.10.173; 5.11 to before 5.15.100; 5.16 to before 6.1.18; 6.2 to before 6.2.5 | Vulnerable | Linux |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 2.6.25 to before 4.14.308; 4.15 to before 4.19.276; 4.20 to before 5.4.235; 5.5 to before 5.10.173; 5.11 to before 5.15.100; 5.16 to before 6.1.18; 6.2 to before 6.2.5 Vulnerable ·Linux
Remediation
- Fix · CNA Linux (Linux) Fixed in 4.14.308, 4.19.276, 5.4.235, 5.10.173, 5.15.100, 6.1.18, 6.2.5, 6.3
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 8 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 9 | Affected | No fix yet: Fix deferred |
Not affected: 1 product
- Red Hat Enterprise Linux 10
Timeline
- 2026-10-02 Threatist record created from CVE-2023-53481
- 2026-10-03 Alias added: GHSA-3pv3-rmr2-25g2
- 2026-10-16 CISA SSVC decision points changed
References
Patch 8
- https://git.kernel.org/stable/c/b40d2fbf47af58377e898b5062077a47bb28a132
- https://git.kernel.org/stable/c/f006f596fe851c3b6aae60b79f89f89f0e515d2f
- https://git.kernel.org/stable/c/b5be23f6ae610bdb262160a1f294afee6d0e6a69
- https://git.kernel.org/stable/c/8a18856e074479bd050b01e688c58defadce7ab0
- https://git.kernel.org/stable/c/3afaaf6f5867dc4ad383808d4053f428ec7b867d
- https://git.kernel.org/stable/c/cc4bc532acda66189bddc03b3fe1ad689d9a48a2
- https://git.kernel.org/stable/c/5af1c643184a5d09ff5b3f334077a4d0a163c677
- https://git.kernel.org/stable/c/4d57a7333e26040f2b583983e1970d9d460e56b0
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- 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-2023-53481 · CVE Program
- CVE-2023-53481 · NVD
- FIRST EPSS
- GHSA-3pv3-rmr2-25g2 · GitHub Advisory Database · CC BY 4.0
- CVE-2023-53481 · Red Hat security data · CC BY 4.0
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