CVE-2024-56717: net: mscc: ocelot: fix incorrect IFH SRC_PORT field in ocelot_ifh_set_basic()
First published: Sun Dec 29 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: net: mscc: ocelot: fix incorrect IFH SRC_PORT field in ocelot_ifh_set_basic() Packets injected by the CPU should have a SRC_PORT field equal to the CPU port module index in the Analyzer block (ocelot->num_phys_ports). The blamed commit copied the ocelot_ifh_set_basic() call incorrectly from ocelot_xmit_common() in net/dsa/tag_ocelot.c. Instead of calling with "x", it calls with BIT_ULL(x), but the field is not a port mask, but rather a single port index. [ side note: this is the technical debt of code duplication :( ] The error used to be silent and doesn't appear to have other user-visible manifestations, but with new changes in the packing library, it now fails loudly as follows: ------------[ cut here ]------------ Cannot store 0x40 inside bits 46-43 - will truncate sja1105 spi2.0: xmit timed out WARNING: CPU: 1 PID: 102 at lib/packing.c:98 __pack+0x90/0x198 sja1105 spi2.0: timed out polling for tstamp CPU: 1 UID: 0 PID: 102 Comm: felix_xmit Tainted: G W N 6.13.0-rc1-00372-gf706b85d972d-dirty #2605 Call trace: __pack+0x90/0x198 (P) __pack+0x90/0x198 (L) packing+0x78/0x98 ocelot_ifh_set_basic+0x260/0x368 ocelot_port_inject_frame+0xa8/0x250 felix_port_deferred_xmit+0x14c/0x258 kthread_worker_fn+0x134/0x350 kthread+0x114/0x138 The code path pertains to the ocelot switchdev driver and to the felix secondary DSA tag protocol, ocelot-8021q. Here seen with ocelot-8021q. The messenger (packing) is not really to blame, so fix the original commit instead.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | >=6.1.107<6.1.122 | |
| Linux Kernel | >=6.6.48<6.6.68 | |
| Linux Kernel | >=6.10.7<6.12.7 | |
| Linux Kernel | =6.13-rc1 | |
| Linux Kernel | =6.13-rc2 | |
| Linux Kernel | =6.13-rc3 | |
| debian/linux | 5.10.223-1 5.10.234-1 6.1.129-1 6.1.128-1 6.12.20-1 6.12.21-1 | |
| debian/linux-6.1 | 6.1.129-1~deb11u1 |
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Reference Links
- https://git.kernel.org/stable/c/59c4ca8d8d7918eb6e2df91d2c254827264be309
- https://git.kernel.org/stable/c/2f3c62ffe88116cd2a39cd73e01103535599970f
- https://git.kernel.org/stable/c/a8836eae3288c351acd3b2743d2fad2a4ee2bd56
- https://git.kernel.org/stable/c/2d5df3a680ffdaf606baa10636bdb1daf757832e
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-56717
- https://nvd.nist.gov/vuln/detail/CVE-2024-56717
- https://launchpad.net/bugs/cve/CVE-2024-56717
- https://security-tracker.debian.org/tracker/CVE-2024-56717
- https://ubuntu.com/security/CVE-2024-56717
- https://git.kernel.org/linus/2d5df3a680ffdaf606baa10636bdb1daf757832e
Frequently Asked Questions
What is the severity of CVE-2024-56717?
CVE-2024-56717 has not been assigned a specific severity rating, but it involves a fix in the Linux kernel that addresses packet handling.
How do I fix CVE-2024-56717?
To fix CVE-2024-56717, upgrade to the latest version of the Linux kernel that includes the patch.
Which versions of the Linux kernel are affected by CVE-2024-56717?
CVE-2024-56717 affects Linux kernel versions between 6.1.107 to 6.1.122, 6.6.48 to 6.6.68, 6.10.7 to 6.12.7, and specific release candidates 6.13-rc1, 6.13-rc2, and 6.13-rc3.
What kind of vulnerability is CVE-2024-56717?
CVE-2024-56717 is a vulnerability related to incorrect packet handling in the Linux kernel.
Is CVE-2024-56717 actively being exploited?
There is currently no public indication that CVE-2024-56717 is being actively exploited in the wild.
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