CVE-2026-68143
CVE-2026-68143: 1 tracked advisory record across Red Hat. Compare vendor sources and published fix guidance.
Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.
Vendor advisory comparison
Red Hat
1 advisory- Advisory severityHigh7.8
High [CVE-2026-68143] Linux kernel SLIP: Out-of-bounds write due to race condition during MTU change
CVE-2026-68143Source published Source updated
In the Linux kernel, the following vulnerability has been resolved: net: slip: serialize receive against buffer reallocation sl_realloc_bufs() replaces rbuff and updates buffsize while holding sl->lock. slip_receive_buf() reads those fields and writes through rbuff without holding the lock. An MTU change can therefore race with receive processing. An MTU shrink can expose the new smaller rbuff with the old larger bound, causing an out-of-bounds write. A receive callback which already loaded the old rbuff can instead continue writing after that buffer has been freed. A flaw was found in the Linux kernel's SLIP (Serial Line Internet Protocol) network component. A race condition exists during an MTU (Maximum Transmission Unit) change when the system reallocates receive buffers. This can…
- Affected products in this advisory
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
2 more entries in the full advisory.
- Source-reported affected versions
- Affected-version details not available in this record.
- Source-reported fixed versions
- No fixed-version detail extracted. This does not mean no fix exists.
- Mitigation guidance
- To mitigate this vulnerability, prevent the `slip` kernel module from loading if the SLIP protocol is not required. Create a file `/etc/modprobe.d/disable-slip.conf` with the content `blacklist slip`. Then, regenerate the initramfs using `dracut -f -v`. A system reboot is required for the changes to be fully applied. This action may impact systems relying on the SLIP protocol for network communication.
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