CVE-2026-72014 in the critical feed json
drbd: reject data replies with an out-of-range payload size
published 2026-08-15 2 mo ago modified 2026-10-19 20 d ago also EUVD-2026-59113
- cvss
- 9.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.7%
- EPSS 0.7% chance of exploitation in 30 days, percentile 54%
- public exploits
- 0
- none known
Summary
In the Linux kernel, the following vulnerability has been resolved:
drbd: reject data replies with an out-of-range payload size
recv_dless_read() receives a P_DATA_REPLY from a peer into the bio of an outstanding read request. The peer-supplied payload length reaches it as the signed int data_size, and two peer-controlled inputs can make it negative. With a negotiated data-integrity-alg the digest length is subtracted first, so a reply whose payload is smaller than the digest underflows data_size. With no integrity algorithm (the default) data_size is assigned from the unsigned h95/h100 wire length and drbdd() never bounds it for a payload-carrying command, so a length above INT_MAX casts it negative; this path needs no non-default feature. The bio receive loop then computes expect = min_t(int, data_size, bv_len), which is negative, and drbd_recv_all_warn(mapped, expect) receives with a size_t of SIZE_MAX into the first mapped page.
The sibling receive path read_in_block() is not affected: it uses an unsigned size and rejects it against DRBD_MAX_BIO_SIZE before receiving. Reject a data reply whose size is negative after the optional digest subtraction, covering both triggers.
Impact: a malicious or man-in-the-middle DRBD peer copies attacker-chosen bytes past a bio page in the receiver, corrupting kernel memory. A node that reads from its peer (a diskless node, or read-balancing to the peer) is exposed in the default configuration; data-integrity-alg is not required.
Patch / fix
- Linux Linux 5.10.261, 5.15.212, 6.1.178, 6.6.145, 6.12.97, 6.18.40, 7.1.5, 7.2
- linux Debian 12 6.1.180-1
- linux Debian 13 6.12.100-1
- linux Debian 14 7.1.5-1
debian advisories DEBIAN-CVE-2026-72014
- linux Ubuntu 22.04 LTS 5.15.0-198.208
- linux Ubuntu 24.04 LTS 6.8.0-147.147
- linux Ubuntu 26.04 LTS 7.0.0-34.34
- linux-aws Ubuntu 22.04 LTS 5.15.0-1117.124
- linux-aws Ubuntu 24.04 LTS 6.8.0-1067.70
- linux-aws Ubuntu 26.04 LTS 7.0.0-1013.13
- linux-gcp Ubuntu 22.04 LTS 5.15.0-1118.128
- linux-gcp Ubuntu 24.04 LTS 6.8.0-1071.79
ubuntu advisories UBUNTU-CVE-2026-72014
Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0
- git.kernel.org/stable/c/bca33f5442c3094511719d9db792ce3165d87e76 commit
- git.kernel.org/stable/c/741a682535deffe9ab7e5c89caf83571efbc9dd9 commit
- git.kernel.org/stable/c/f14e87d7b166490bceb9603b39310e51595d05b9 commit
- git.kernel.org/stable/c/f16866c62656865854106b79bcf6e4ca97a51a92 commit
- git.kernel.org/stable/c/5f59a8142000f0b8f75c432209ead73c424a745d commit
- git.kernel.org/stable/c/38cc4867540ae8beedfe41a1a1a6ed37052c77d6 commit
- git.kernel.org/stable/c/648d4317326e6aa3f8c05cbf0fd14cc2eba6ca99 commit
- git.kernel.org/stable/c/bd910a7660d280595ef94cb6d193951d855d330f commit
Vendor advisories
What the vendors themselves say about their products: affected, fixed or not affected, and what to do.
red hat product security vex CVE-2026-72014 updated cvss 5.5
kernel: drbd: reject data replies with an out-of-range payload size
-
Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-rt, kernel-core, kernel-tools, +29 more Red Hat Enterprise Linux 9 rv, perf, rtla, kernel, bpftool, libperf, +83 more Red Hat Enterprise Linux 10 kernelnot affected: vulnerable code not present
Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- total
- Assessed
- 23 d ago
Exploit prediction
0.72% chance of exploitation in the next 30 days, higher than 54% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected products
- Linux Linux
Classification
- Weakness
-
- CWE-190 Integer Overflow or Wraparound
- Technology feeds
References
- git.kernel.org /stable/c/bca33f5442c3094511719d9db792ce3165d87e76
- git.kernel.org /stable/c/741a682535deffe9ab7e5c89caf83571efbc9dd9
- git.kernel.org /stable/c/f14e87d7b166490bceb9603b39310e51595d05b9
- git.kernel.org /stable/c/f16866c62656865854106b79bcf6e4ca97a51a92
- git.kernel.org /stable/c/5f59a8142000f0b8f75c432209ead73c424a745d
- git.kernel.org /stable/c/38cc4867540ae8beedfe41a1a1a6ed37052c77d6
- git.kernel.org /stable/c/648d4317326e6aa3f8c05cbf0fd14cc2eba6ca99
- git.kernel.org /stable/c/bd910a7660d280595ef94cb6d193951d855d330f
Sources
- CVE List CVE-2026-72014
- NVD CVE-2026-72014
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