CVE-2026-90088: linux

CVSS: UnknownReceived
AliasesUBUNTU-CVE-2026-90088DEBIAN-CVE-2026-90088
Published 17-09-2026Last modified 19-10-2026
Open JSON

Vulnerability summary

CVE-2026-90088 is a vulnerability in linux with no CVSS score yet. EPSS estimates a 0.21% chance of exploitation in the next 30 days, higher than 10.7% of scored vulnerabilities.

Overall risk
0/100
0100
Minimal · default modelHow is this calculated?
CVSS score
Not scored
010
No CVSS score recorded
EPSS score
0.21%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 8 · Related 8
OPENSUSE-SU-2026:11880-1SUSE-SU-2026:24181-1SUSE-SU-2026:24182-1SUSE-SU-2026:4639-1SUSE-SU-2026:4640-1SUSE-SU-2026:4660-1

Timeline

  1. 17-09-2026
    PublishedVulnerability first disclosed.
  2. 19-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: RFCOMM: Validate MTU in rfcomm_apply_pn() to prevent infinite loop rfcomm_apply_pn() accepts the MTU value from a remote PN (Parameter Negotiation) frame without checking for zero. When the remote peer sends an MTU of zero, d->mtu is set to 0. This causes the sendmsg path to enter an infinite loop when fragmenting data, as each fragment has size == min_t(size_t, len, 0) == 0, so the remaining length never decreases. The infinite allocation of zero-length skbs exhausts all system memory. Fix by clamping d->mtu to RFCOMM_DEFAULT_MTU when the negotiated value is zero, consistent with the initial value assigned in rfcomm_dlc_alloc().

CVSS metrics

Risk metrics not yet published.

EPSS trend

Probability

0.21%

Chance of exploitation in the next 30 days

Percentile

11%

Versus all other CVEs

30-day change

0.00 pp

From 0.21% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.21%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Ubuntu169 products
  • linuxAll versions (No fix recorded)
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian2 products
  • linuxAll versions (No fix recorded) | < 6.1.190-1 | < 6.12.111-1 | < 7.2.6-1
  • linux-6.12< 6.12.111-1~deb12u1
Linux1 product
  • linux≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < e7c0aa45ae6c5a338661b23812bfcdef50bf3e96 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < cbc2962da99b6b89345267d3aa74b4b573340548 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 9b2e5f1928c99224345a9ed8c5dae5fc74964d6d | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < fc4851ff8dfb505e9a19efcc286712132bbd178d | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < f561e44261344adadf9d6a6dff31e3af9776d5c6 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < aeee917a4878af95f0c63e18c5f22eaf6299c7b8 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 3988cbb1be501dbff909a2ee024670e3c955a66d | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 44c98fd082eafd49d55a8a4077ff488175b2fe24 | 2.6.12

3 vendors · 172 products

References

13 links
Show all 13 references