CVE-2026-72083
- Source
- https://cve.org/CVERecord?id=CVE-2026-72083
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72083.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-72083
- Downstream
- Published
- 2026-08-15T05:52:32Z
- Modified
- 2026-08-18T03:56:19Z
- Severity
-
- 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- scsi: target: core: Fix iSCSI ISID use-after-free in REGISTER AND MOVE
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
scsi: target: core: Fix iSCSI ISID use-after-free in REGISTER AND MOVE
core_scsi3_emulate_pro_register_and_move() maps the PERSISTENT RESERVE OUT parameter list with transport_kmap_data_sg() and parses the destination TransportID with target_parse_pr_out_transport_id(). For an iSCSI TransportID (FORMAT CODE 01b), iscsi_parse_pr_out_transport_id() returns the ISID in iport_ptr as a raw pointer into that mapped buffer.
The function then unmaps the buffer with transport_kunmap_data_sg() before dereferencing iport_ptr in strcmp(), __core_scsi3_locate_pr_reg() and core_scsi3_alloc_registration(). When the parameter list spans more than one page (PARAMETER LIST LENGTH > 4096), transport_kmap_data_sg() uses vmap() and transport_kunmap_data_sg() does vunmap(), so the kernel virtual address backing iport_ptr is torn down and every subsequent dereference is a use-after-free read of the unmapped region.
Keep the parameter list mapped until iport_ptr is no longer needed: drop the early transport_kunmap_data_sg() and unmap once on the success path, right before returning. The error paths already unmap through the existing "if (buf) transport_kunmap_data_sg(cmd)" at the out: label, which now runs on every post-map error exit because buf is no longer cleared early. Only reads of the mapping happen while spinlocks are held; the map and unmap calls remain outside any lock. The sibling caller core_scsi3_decode_spec_i_port() already uses the buffer before unmapping it and is left unchanged.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72083.json" }- References
-
- https://git.kernel.org/stable/c/05b3e37433cf2eaf8867f1c16528aa347bb212ab
- https://git.kernel.org/stable/c/59a2a5a37dc49a641ad6bc64aee34e5a61025ffd
- https://git.kernel.org/stable/c/7d56f5c868d92c9d504a34a3ea450bce481c7f63
- https://git.kernel.org/stable/c/9f8076cc73dfa6b10155978c160587e986b22169
- https://git.kernel.org/stable/c/a040004846f1fbe687f6ec76d9ccc27b4ead42e4
- https://git.kernel.org/stable/c/cb7bdae7fba404852ade34b0c1445fbaf3e54fbb
- https://git.kernel.org/stable/c/ef2ee18fec92088c7d8877baf7674e89389ccd66
- https://git.kernel.org/stable/c/fda6a1f3c3d7047b5ce5654487649c2daa738bfc
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72083.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-72083
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced4949314c7283ea4f9ade182ca599583b89f7edd6Fixed7d56f5c868d92c9d504a34a3ea450bce481c7f63Fixed59a2a5a37dc49a641ad6bc64aee34e5a61025ffdFixed9f8076cc73dfa6b10155978c160587e986b22169Fixeda040004846f1fbe687f6ec76d9ccc27b4ead42e4Fixed05b3e37433cf2eaf8867f1c16528aa347bb212abFixedcb7bdae7fba404852ade34b0c1445fbaf3e54fbbFixedef2ee18fec92088c7d8877baf7674e89389ccd66Fixedfda6a1f3c3d7047b5ce5654487649c2daa738bfc
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedLast Affectedd2227f84ba0e97906153ac83db13213fb2e3938d
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced3.2.9Fixed3.3
Affected versions
v2.*
v3.*
Linux / Kernel
Package
- Name
- Kernel
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced3.3.0Fixed5.10.261
- Type
- ECOSYSTEM
- Events
-
Introduced5.11.0Fixed5.15.212
- Type
- ECOSYSTEM
- Events
-
Introduced5.16.0Fixed6.1.178
- Type
- ECOSYSTEM
- Events
-
Introduced6.2.0Fixed6.6.145
- Type
- ECOSYSTEM
- Events
-
Introduced6.7.0Fixed6.12.97
- Type
- ECOSYSTEM
- Events
-
Introduced6.13.0Fixed6.18.40
- Type
- ECOSYSTEM
- Events
-
Introduced6.19.0Fixed7.1.5