CVE-2024-26665

high

Published 2024-09-24 · Modified 2024-09-24

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CVSS v3

—

CVSS v4 NEW

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not yet in upstream

VIR risk

8.0

Description

In the Linux kernel, the following vulnerability has been resolved: tunnels: fix out of bounds access when building IPv6 PMTU error If the ICMPv6 error is built from a non-linear skb we get the following splat, BUG: KASAN: slab-out-of-bounds in do_csum+0x220/0x240 Read of size 4 at addr ffff88811d402c80 by task netperf/820 CPU: 0 PID: 820 Comm: netperf Not tainted 6.8.0-rc1+ #543 ... kasan_report+0xd8/0x110 do_csum+0x220/0x240 csum_partial+0xc/0x20 skb_tunnel_check_pmtu+0xeb9/0x3280 vxlan_xmit_one+0x14c2/0x4080 vxlan_xmit+0xf61/0x5c00 dev_hard_start_xmit+0xfb/0x510 __dev_queue_xmit+0x7cd/0x32a0 br_dev_queue_push_xmit+0x39d/0x6a0 Use skb_checksum instead of csum_partial who cannot deal with non-linear SKBs.

Predictions

Exploit likelihood

20%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

Mitigation details

Source: Red Hat Errata — Red Hat Inc. · View original ↗ · Open-Errata-API

Description kernel: tunnels: fix out of bounds access when building IPv6 PMTU error Red Hat statement Red Hat Enterprise Linux 9 is not affected by this vulnerability, as it was already patched in the 9.4.0 release. CVSS v3: 7.1 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H) Errata / fixed releases ProductPackageAdvisoryReleased Red Hat Enterprise Linux…

Description

kernel: tunnels: fix out of bounds access when building IPv6 PMTU error

Red Hat statement

Red Hat Enterprise Linux 9 is not affected by this vulnerability, as it was already patched in the 9.4.0 release.

CVSS v3: 7.1 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H)

Errata / fixed releases

Product	Package	Advisory	Released
Red Hat Enterprise Linux 8	`kernel-rt-0:4.18.0-553.22.1.rt7.363.el8_10`	RHSA-2024:7001	2024-09-24T00:00:00Z
Red Hat Enterprise Linux 8	`kernel-0:4.18.0-553.22.1.el8_10`	RHSA-2024:7000	2024-09-24T00:00:00Z
Red Hat Enterprise Linux 8.8 Extended Update Support	`kernel-0:4.18.0-477.74.1.el8_8`	RHSA-2024:6993	2024-09-24T00:00:00Z

Package state

Product	Package	State
Red Hat Enterprise Linux 6	`kernel`	Out of support scope
Red Hat Enterprise Linux 7	`kernel`	Out of support scope
Red Hat Enterprise Linux 7	`kernel-rt`	Out of support scope
Red Hat Enterprise Linux 9	`kernel`	Not affected
Red Hat Enterprise Linux 9	`kernel-rt`	Affected

Apply commands

bash fix

Apply RHSA-2024:7001 for Red Hat Enterprise Linux 8

yum update -y kernel-rt
# or:
dnf upgrade -y kernel-rt

Affected

Vendor	Product	Version
redhat	Red Hat Enterprise Linux 9	`Not affected`
redhat	Red Hat Enterprise Linux 9	`Affected`

OS impact

SUSE Affected 1 release

Version	Status	Fixed in
—	Affected	—

AlmaLinux Fixed 1 release

Version	Status	Fixed in
8	Fixed	`kernel-abi-stablelists-4.18.0-553.22.1.el8_10.noarch.rpm`

Debian Fixed 5 releases

Version	Status	Fixed in
trixie	Fixed	`6.7.7-1`
sid	Fixed	`6.7.7-1`
forky	Fixed	`6.7.7-1`
bullseye	Fixed	`5.10.216-1`
bookworm	Fixed	`6.1.82-1`

Red Hat Fixed 1 release

Version	Status	Fixed in
8	Fixed	—

Rocky Linux Fixed 1 release

Version	Status	Fixed in
8	Fixed	—

References

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.