Input: ims-pcu - fix heap-buffer-overflow in ims_pcu_process_data()
Summary
| CVE | CVE-2026-64565 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-08-04 07:16:31 UTC |
| Updated | 2026-08-19 17:20:16 UTC |
| Description | In the Linux kernel, the following vulnerability has been resolved: Input: ims-pcu - fix heap-buffer-overflow in ims_pcu_process_data() The `ims_pcu_process_data()` processes incoming URB data byte by byte. However, it fails to check if the `read_pos` index exceeds IMS_PCU_BUF_SIZE. If a malicious USB device sends a packet larger than IMS_PCU_BUF_SIZE, `read_pos` will increment indefinitely. Moreover, since `read_pos` is located immediately after `read_buf`, the attacker can overwrite `read_pos` itself to arbitrarily control the index. This manipulated `read_pos` is subsequently used in `ims_pcu_handle_response()` to copy data into `cmd_buf`, leading to a heap buffer overflow. Specifically, an attacker can overwrite the `cmd_done.wait.head` located at offset 136 relative to `cmd_buf` in the `ims_pcu_handle_response()`. Consequently, when the driver calls `complete(&pcu->cmd_done)`, it triggers a control flow hijack by using the manipulated pointer. Fix this by adding a bounds check for `read_pos` before writing to `read_buf`. If the packet is too long, discard it, log a warning, and reset the parser state. [dtor: factor out resetting packet state, reset checksum as well] |
Risk And Classification
EPSS: 0.001730000 probability, percentile 0.070620000 (date 2026-08-19)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected 628329d52474323938a03826941e166bc7c8eff4 06cfff93fd40441292567b999091beab11c74504 git | Not specified |
| CNA | Linux | Linux | affected 628329d52474323938a03826941e166bc7c8eff4 992a7173364dcf63e30012af43da3c2f279839f9 git | Not specified |
| CNA | Linux | Linux | affected 628329d52474323938a03826941e166bc7c8eff4 3a801bc75ba1d121d0ed60e7234f93ba5651d87d git | Not specified |
| CNA | Linux | Linux | affected 628329d52474323938a03826941e166bc7c8eff4 40bbbf2e91fd60715525bf0405c67876af817edf git | Not specified |
| CNA | Linux | Linux | affected 628329d52474323938a03826941e166bc7c8eff4 ca9f8c09845fb8c51b6d447f6428eecd1b8b0a49 git | Not specified |
| CNA | Linux | Linux | affected 628329d52474323938a03826941e166bc7c8eff4 d03a740e087de7dcb2a26dc1123377bd3d1d84ca git | Not specified |
| CNA | Linux | Linux | affected 628329d52474323938a03826941e166bc7c8eff4 875115b82c295277b81b6dfee7debc725f44e854 git | Not specified |
| CNA | Linux | Linux | affected 3.10 | Not specified |
| CNA | Linux | Linux | unaffected 3.10 semver | Not specified |
| CNA | Linux | Linux | unaffected 5.10.265 5.10.* semver | Not specified |
| CNA | Linux | Linux | unaffected 5.15.216 5.15.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.183 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.148 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.101 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.42 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.1 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/992a7173364dcf63e30012af43da3c2f279839f9 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/06cfff93fd40441292567b999091beab11c74504 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/3a801bc75ba1d121d0ed60e7234f93ba5651d87d | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/d03a740e087de7dcb2a26dc1123377bd3d1d84ca | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/40bbbf2e91fd60715525bf0405c67876af817edf | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/875115b82c295277b81b6dfee7debc725f44e854 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/ca9f8c09845fb8c51b6d447f6428eecd1b8b0a49 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.