CVE-2026-31630
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
rxrpc: proc: size address buffers for %pISpc output
In the Linux kernel, the following vulnerability has been resolved: rxrpc: proc: size address buffers for %pISpc output The AF_RXRPC procfs helpers format local and remote socket addresses into fixed 50-byte stack buffers with "%pISpc". That is too small for the longest current-tree IPv6-with-port form the formatter can produce. In lib/vsprintf.c, the compressed IPv6 path uses a dotted-quad tail not only for v4mapped addresses, but also for ISATAP addresses via ipv6_addr_is_isatap(). As a result, a case such as [ffff:ffff:ffff:ffff:0:5efe:255.255.255.255]:65535 is possible with the current formatter. That is 50 visible characters, so 51 bytes including the trailing NUL, which does not fit in the existing char[50] buffers used by net/rxrpc/proc.c. Size the buffers from the formatter's maximum textual form and switch the call sites to scnprintf(). Changes since v1: - correct the changelog to cite the actual maximum current-tree case explicitly - frame the proof around the ISATAP formatting path instead of the earlier mapped-v4 example
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 75b54cb57ca34cbe7a87c6ac757c55360a624590 | affected | git | 386c86412608d3449006a318a662cbcd6ca1f668 | Unavailable | None listed |
| 75b54cb57ca34cbe7a87c6ac757c55360a624590 | affected | git | 235b2115de892eab2e107a42efa7a4347baaa80b | Unavailable | None listed |
| 75b54cb57ca34cbe7a87c6ac757c55360a624590 | affected | git | 625af53a1564e31bb2df9adc3739df46137f46c1 | Unavailable | None listed |
| 75b54cb57ca34cbe7a87c6ac757c55360a624590 | affected | git | 808a34cdbe8ce336c202d8ea6d5e48496764dc37 | Unavailable | None listed |
| 75b54cb57ca34cbe7a87c6ac757c55360a624590 | affected | git | a6042b8066b24dbcc7945616a157d4d43e463668 | Unavailable | None listed |
| 75b54cb57ca34cbe7a87c6ac757c55360a624590 | affected | git | db297c78ce537c9ac96f0eda9b25ad72c8caefa9 | Unavailable | None listed |
| 75b54cb57ca34cbe7a87c6ac757c55360a624590 | affected | git | 10ebed83f9f6414af4e85bc85ffaeda7effdd874 | Unavailable | None listed |
| 75b54cb57ca34cbe7a87c6ac757c55360a624590 | affected | git | a44ce6aa2efb61fe44f2cfab72bb01544bbca272 | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 4.9 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 4.9 | Unavailable | None listed |
| 5.10.258 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.209 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.175 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.160 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.114 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.23 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 6.19.13 | unaffected | semver | Unavailable | 6.19.* | None listed |
| 7.0 | unaffected | original_commit_for_fix | Unavailable | * | None listed |