CVE-2026-98524rds: ib: Clear the sg list when mapping an MR fails
- 7.8HighCVSS base score
- 0.17%Exploitation in 30 daysEPSS · top 93% 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: rds: ib: Clear the sg list when mapping an MR fails rds_ib_map_frmr() stores the caller's scatterlist in the MR before DMA mapping and registration can fail. On failure, __rds_rdma_map() unpins the pages and frees the scatterlist, but rds_ib_free_frmr() can still return the MR to the pool with the stale pointer set. This leaves the pool with a dangling scatterlist and can lead to local privilege escalation. KASAN detects the resulting use-after-free when the MR is later torn down: BUG: KASAN: slab-use-after-free in __rds_ib_teardown_mr Read of size 8 Call Trace: __rds_ib_teardown_mr rds_ib_unreg_frmr rds_ib_flush_mr_pool rds_ib_flush_mrs rds_free_mr rds_setsockopt Store the scatterlist in the MR only after DMA mapping succeeds. If DMA mapping fails, return directly while the MR fields remain clear; the caller keeps ownership of the scatterlist and its pinned pages. If a later registration step fails, unmap the scatterlist and clear the MR fields before returning.
Timeline
ID reserved
By Linux
- 23 days later
· 23 days later
Published
- 6 days later
· 6 days 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 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Received | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.17% · top 93% of all CVEs (12 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected 1659185fb4d0025835eb2058a141f0746c5cab00 – < 1be3211e6ac77adbb1eac01314d989d243b32c59
- affected 1659185fb4d0025835eb2058a141f0746c5cab00 – < c42d316163f89cd23de2f3e24558177a8c29bad8
- affected 1659185fb4d0025835eb2058a141f0746c5cab00 – < 8dca3c81344532a7f05edb3d12f31f3009410a90
- affected 1659185fb4d0025835eb2058a141f0746c5cab00 – < 49ba5ed0129906e0362c2e4b5e21c89b2a41e115
- affected 1659185fb4d0025835eb2058a141f0746c5cab00 – < 4468df5bcdef959fd96494e9968f323561a45f4c
- affected 1659185fb4d0025835eb2058a141f0746c5cab00 – < e2ee0616260080376123997488b5cf8a3870b8d9
- affected 1659185fb4d0025835eb2058a141f0746c5cab00 – < b36d32f30c3f1e58e3a5ae79d0f52836a316b36e
- affected 1659185fb4d0025835eb2058a141f0746c5cab00 – < 58eb1b3325edac42dc6df72c80962bd53a3c8ca7
- affected 4.6
- unaffected < 4.6
- unaffected 5.10.271 – ≤ 5.10.*
- unaffected 5.15.222 – ≤ 5.15.*
- unaffected 6.1.189 – ≤ 6.1.*
- unaffected 6.6.158 – ≤ 6.6.*
- unaffected 6.12.112 – ≤ 6.12.*
- unaffected 6.18.55 – ≤ 6.18.*
- unaffected 7.2.9 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References8
- https://git.kernel.org/stable/c/1be3211e6ac77adbb1eac01314d989d243b32c59 (opens in a new tab)
- https://git.kernel.org/stable/c/c42d316163f89cd23de2f3e24558177a8c29bad8 (opens in a new tab)
- https://git.kernel.org/stable/c/8dca3c81344532a7f05edb3d12f31f3009410a90 (opens in a new tab)
- https://git.kernel.org/stable/c/49ba5ed0129906e0362c2e4b5e21c89b2a41e115 (opens in a new tab)
- https://git.kernel.org/stable/c/4468df5bcdef959fd96494e9968f323561a45f4c (opens in a new tab)
- https://git.kernel.org/stable/c/e2ee0616260080376123997488b5cf8a3870b8d9 (opens in a new tab)
- https://git.kernel.org/stable/c/b36d32f30c3f1e58e3a5ae79d0f52836a316b36e (opens in a new tab)
- https://git.kernel.org/stable/c/58eb1b3325edac42dc6df72c80962bd53a3c8ca7 (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-2026-103569 (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-2026-98524)Record last updated .