CVE-2026-46053

net: rds: fix MR cleanup on copy error

At a glance

Severity: HIGH 7.8
EPSS: EPSS 0.13 % · percentile 3 (2026-10-27)
State: PUBLISHED
Published: 2026-05-27
Updated: 2026-08-05
Assigner: Linux
NVD status: Analyzed

Description

In the Linux kernel, the following vulnerability has been resolved: net: rds: fix MR cleanup on copy error __rds_rdma_map() hands sg/pages ownership to the transport after get_mr() succeeds. If copying the generated cookie back to user space fails after that point, the error path must not free those resources again before dropping the MR reference. Remove the duplicate unpin/free from the put_user() failure branch so that MR teardown is handled only through the existing final cleanup path.

Scores

Version	Score	Vector	Scored by
CVSS 3.1	HIGH 7.8	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	Linux
CVSS 3.1	HIGH 7.8	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	NVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary)

European references

ENISA EUVD · EUVD-2026-32435
GCVE · GCVE-0-2026-46053

CERT-FR advisories

CERTFR-2026-AVI-1229 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
CERTFR-2026-AVI-1093 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
CERTFR-2026-AVI-1066 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
CERTFR-2026-AVI-0985 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
CERTFR-2026-AVI-0956 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
CERTFR-2026-AVI-0954 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
CERTFR-2026-AVI-0927 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
CERTFR-2026-AVI-0926 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
CERTFR-2026-AVI-0864 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
CERTFR-2026-AVI-0862 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
CERTFR-2026-AVI-0861 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
CERTFR-2026-AVI-0831 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
CERTFR-2026-AVI-0731 — Multiples vulnérabilités dans les produits Microsoft · cert.ssi.gouv.fr

Affected configurations (NVD CPE)

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* ≥ 5.6.1 < 5.10.258
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* ≥ 5.11 < 5.15.209
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* ≥ 5.16 < 6.1.175
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* ≥ 6.2 < 6.6.140
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* ≥ 6.7 < 6.12.86
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* ≥ 6.13 < 6.18.27
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* ≥ 6.19 < 7.0.4
cpe:2.3:o:linux:linux_kernel:5.6:-:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.6:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.6:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.6:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.6:rc6:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.6:rc7:*:*:*:*:*:*

Affected products

Product	Versions
Linux · Linux	affected 0d4597c8c5abdeeaf50774066c16683f30184dc8 < 91a44b406bc1f9e1c5da0cb7d0d5991b43b79147 ; affected 0d4597c8c5abdeeaf50774066c16683f30184dc8 < 106dc689206610cfa2098f593fdd1e020c997835 ; affected 0d4597c8c5abdeeaf50774066c16683f30184dc8 < ec55a86f7fba7d9111df94b9c11a4755ed492995 ; affected 0d4597c8c5abdeeaf50774066c16683f30184dc8 < 8fdbb6262a4a3ed44a0830a7793903b54bb27bdc ; affected 0d4597c8c5abdeeaf50774066c16683f30184dc8 < d95cea9298be1ba8876e3f156be96d3a492085ca ; affected 0d4597c8c5abdeeaf50774066c16683f30184dc8 < 033370ffb3c9c0264d19f8ba9ef769523266589a
Linux · Linux	affected 5.6 ; unaffected 0 < 5.6 ; unaffected 5.10.258 ≤ 5.10.* ; unaffected 5.15.209 ≤ 5.15.* ; unaffected 6.1.175 ≤ 6.1.* ; unaffected 6.6.140 ≤ 6.6.*

Product

Versions

Linux · Linux

affected 0d4597c8c5abdeeaf50774066c16683f30184dc8 < 91a44b406bc1f9e1c5da0cb7d0d5991b43b79147 ; affected 0d4597c8c5abdeeaf50774066c16683f30184dc8 < 106dc689206610cfa2098f593fdd1e020c997835 ; affected 0d4597c8c5abdeeaf50774066c16683f30184dc8 < ec55a86f7fba7d9111df94b9c11a4755ed492995 ; affected 0d4597c8c5abdeeaf50774066c16683f30184dc8 < 8fdbb6262a4a3ed44a0830a7793903b54bb27bdc ; affected 0d4597c8c5abdeeaf50774066c16683f30184dc8 < d95cea9298be1ba8876e3f156be96d3a492085ca ; affected 0d4597c8c5abdeeaf50774066c16683f30184dc8 < 033370ffb3c9c0264d19f8ba9ef769523266589a

Linux · Linux

affected 5.6 ; unaffected 0 < 5.6 ; unaffected 5.10.258 ≤ 5.10.* ; unaffected 5.15.209 ≤ 5.15.* ; unaffected 6.1.175 ≤ 6.1.* ; unaffected 6.6.140 ≤ 6.6.*

References

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)	Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD