CVE-2026-89503
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
ring-buffer: Fix subbuf resize race with ring_buffer_alloc_read_page()
In the Linux kernel, the following vulnerability has been resolved: ring-buffer: Fix subbuf resize race with ring_buffer_alloc_read_page() ring_buffer_alloc_read_page() is racy with ring_buffer_subbuf_order_set, it can allocate a reader page with an outdated order. This isn't a big issue, the user can still re-allocate a new reader page and try again. However, what is more problematic is if the value of subbuf_order changes in the middle of ring_buffer_alloc_read_page(). In that case, bpage->order might not match the actual allocated memory. Use bpage->order for the allocation to prevent this race.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| bce761d757452ba5eb77e11fecc37a04b67494e7 | affected | git | 2313ff69bd237aad264a5913907f374f958335a2 | Unavailable | None listed |
| bce761d757452ba5eb77e11fecc37a04b67494e7 | affected | git | 2dc510957fe8fd098ab3c3147ebdf34d00cd2734 | Unavailable | None listed |
| bce761d757452ba5eb77e11fecc37a04b67494e7 | affected | git | 53106e9262a310ef2c9a9321168c03705940c678 | Unavailable | None listed |
| bce761d757452ba5eb77e11fecc37a04b67494e7 | affected | git | e743527c5bfdceda1095bc0a9e596e2aebb6a9c3 | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 6.8 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 6.8 | Unavailable | None listed |
| 6.12.112 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.50 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 7.2.4 | unaffected | semver | Unavailable | 7.2.* | None listed |
| 7.3 | unaffected | original_commit_for_fix | Unavailable | * | None listed |