- 9.8CriticalCVSS base score
- 0.72%Exploitation in 30 daysEPSS · top 45% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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.
Timeline
ID reserved
By Linux
- 6 days later
· 6 days later
Published
- 2 months later
· 2 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Received | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.72% · top 45% of all CVEs (11 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Affected products
- affected 4949314c7283ea4f9ade182ca599583b89f7edd6 – < 7d56f5c868d92c9d504a34a3ea450bce481c7f63
- affected 4949314c7283ea4f9ade182ca599583b89f7edd6 – < 59a2a5a37dc49a641ad6bc64aee34e5a61025ffd
- affected 4949314c7283ea4f9ade182ca599583b89f7edd6 – < 9f8076cc73dfa6b10155978c160587e986b22169
- affected 4949314c7283ea4f9ade182ca599583b89f7edd6 – < a040004846f1fbe687f6ec76d9ccc27b4ead42e4
- affected 4949314c7283ea4f9ade182ca599583b89f7edd6 – < 05b3e37433cf2eaf8867f1c16528aa347bb212ab
- affected 4949314c7283ea4f9ade182ca599583b89f7edd6 – < cb7bdae7fba404852ade34b0c1445fbaf3e54fbb
- affected 4949314c7283ea4f9ade182ca599583b89f7edd6 – < ef2ee18fec92088c7d8877baf7674e89389ccd66
- affected 4949314c7283ea4f9ade182ca599583b89f7edd6 – < fda6a1f3c3d7047b5ce5654487649c2daa738bfc
- affected d2227f84ba0e97906153ac83db13213fb2e3938d
- affected 3.2.9 – < 3.3
- affected 3.3
- unaffected < 3.3
- unaffected 5.10.261 – ≤ 5.10.*
- unaffected 5.15.212 – ≤ 5.15.*
- unaffected 6.1.178 – ≤ 6.1.*
- unaffected 6.6.145 – ≤ 6.6.*
- unaffected 6.12.97 – ≤ 6.12.*
- unaffected 6.18.40 – ≤ 6.18.*
- unaffected 7.1.5 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References8
- https://git.kernel.org/stable/c/7d56f5c868d92c9d504a34a3ea450bce481c7f63 (opens in a new tab)
- https://git.kernel.org/stable/c/59a2a5a37dc49a641ad6bc64aee34e5a61025ffd (opens in a new tab)
- https://git.kernel.org/stable/c/9f8076cc73dfa6b10155978c160587e986b22169 (opens in a new tab)
- https://git.kernel.org/stable/c/a040004846f1fbe687f6ec76d9ccc27b4ead42e4 (opens in a new tab)
- https://git.kernel.org/stable/c/05b3e37433cf2eaf8867f1c16528aa347bb212ab (opens in a new tab)
- https://git.kernel.org/stable/c/cb7bdae7fba404852ade34b0c1445fbaf3e54fbb (opens in a new tab)
- https://git.kernel.org/stable/c/ef2ee18fec92088c7d8877baf7674e89389ccd66 (opens in a new tab)
- https://git.kernel.org/stable/c/fda6a1f3c3d7047b5ce5654487649c2daa738bfc (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-59041 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-72083)Record last updated .